Electrical Specs

Al Ameera Village Ajman: Package 1 Phase B Residential Buildings Volume – II Specification (Electrical Works)

SECTION – 00

TABLE OF CONTENTS

ELECTRICAL SPECIFICATION SECTION

CONTENT

01

SCOPE OF WORK

02

POWER SUPPLY AND SUBSTATION

03

LOW VOLTAGE SWITCHGEAR

04

POWER FACTOR CORRECTION EQUIPMENT

05

MOTOR STARTER AND CONTROL DEVICES

06

DISCONNECT SWITCHES

07

AUTOMATIC TRANSFER SWITCH

08

MOTOR CONTROL CENTERS AND CONT. PANEL

09

SUB-SWITCH BOARD

10

DISTRIBUTION BOARD

11

Not Applicable

12

CABLE TRAY/LADDER AND FITTING

13

CONDUIT/TRUNKING AND FITTING

14

BUILDING WIRE AND CABLE

15

JUNCTION AND PULL BOXES

16

WIRING DEVICES

17

LIGHTING FIXTURES

18

GROUNDING AND BONDING

19

EMERGENCY LIGHTING SYSTEM

20

Not Applicable

21

ANALOGUE ADDRESSABLE FIRE ALARM SYSTEM

22 23 24

Not Applicable

25

TELEPHONE SYSTEM

26

TELEVISION DISTRIBUTION SYSTEM

27

Not Applicable

28

TESTS & CERTIFICATES

29

APPENDIX A: APPROVED MANUFACTURE

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Al Ameera Village - Ajman Volume –II

Part IIB General Specifications for MEP Works

SECTION – 01 1.1

SCOPE OF WORK

Provide all materials, equipment, labor and services to complete the installation, wiring, testing and commissioning of the complete and functioning electrical system including, but not limited to, the following:

1.1.1

Main Distribution board, Sub main distribution boards, Final Distribution boards, network and distribution cabling etc.

1.1.2

Lighting Points.

1.1.3

Small Power Outlets.

1.1.4

Fire Alarm System

1.1.5

Emergency Lighting System

1.1.6

Light Fitting Installation.

1.1.7

SMATV And CATV System

1.1.8

Telephone System

1.1.9

Earthing System.

1.1.10 Intercom and Door Entry System 1.1.11 Cables, Wires and all networks containments (ladders, cable trays and conduits) 1.1.12 All power points required for any Installed Equipments requiring electrical power in general. 1.2

The responsibility includes for the supply and installation of all materials and equipment referred to or required to provide complete installation complying with this and quoted specifications to the satisfaction of the Engineer.

1.3

The responsibility includes the maintenance of the new electrical installations as specified and as show on drawings for the maintenance period.

1.4

Upon completion of works, the Contractor shall leave the premises in a clean and tidy condition to the satisfaction of the Engineer and the Employer.

1.5

The Contractor shall be responsible for maintaining all liaisons with DEWA, ETISALAT and Civil Defence on all aspects of this project. He shall pay all costs related to this project made by them in connection with the approval, installation, testing and commissioning to achieve the necessary approvals and connections including all extension of services, diversions and other changes made by them to suit the contract programme.

1.6

The contractor shall Co-ordinate the work of the Electrical Division with the work of the other Divisions in all such a manner to ensure proper co-ordination and that there is no interference. In areas where conduits and equipment called for in the Electrical Division are to be installed in conjunction with pipes, ductwork and equipment called for in other Divisions co-ordinate the work to ensure the best use of the space.

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Part IIB General Specifications for MEP Works

1.7

The contractor should comply with the rules and regulations of the IEE, NFPA, UL, IEC, BS, DEWA, Etisalat, Civil Defence Dept. and all local Municipal and Statutory Authorities having jurisdiction over the installation.

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SECTION – 02

POWER SUPPLY AND SUBSTATION

2.1 POWER SUPPLY 2.1.1

The nominal distribution voltage shall be 415 V, 50 Hz, 3 phases and neutral, 4 wires.

2.1.2

Electrical power shall be supplied at 11 KV/415V three phase 50Hz.

2.1.3

Power for the substation shall be brought to the site by others. The supply and installation of H.V. Switchgear transformers and associated cabling shall be by FEWA.

2.1.4

The building shall be fed from the transformers located in the Ground Floor. The main LV switch room shall be located adjacent to the transformer room. The details of the power distribution philosophy are shown in the electrical power schematic.

2.1.5

The Contractor shall be responsible for co-ordinating all trenches, manholes, ducts, cables etc. for the complete installation of the works. Manholes where required shall be equipped with heavy-duty covers.

2.1.6

Where cable ducts enter the building they shall each be provided with an approved waterproof seal and gland arrangement to prevent water entering the building inside the duct and in addition a puddle flange on the outside of each duct. All ducts shall be sloped minimum (1:50) falling away from the building to minimize the likelihood of water entering the building. The route of all underground ducts and cables shall be clearly indicated in the ground surface in an approved manner with cable marker tiles.

2.1.7

Motors, electric heating controls and distribution devices and equipment shall operate satisfactorily at 50 Hz and within the operation limits established by the codes without damage to equipment.

2.1.8

The entire system shall comply with the 16th edition of the IEE Regulations and the regulations of the Local Authority.

2.2 SUBSTATION 2.2.1

The substation shall be equipped with all necessary heavy-duty galvanized steel chequer plate covers on all trenches. All trenches shall be equipped with galvanized steel cable ladder and stainless steel cleats to support the incoming LV cables.

2.2.2

All outgoing cables shall be run on the cable ladder within the trenches in trefoil formation, and all runs shall be straight and parallel. Crossovers shall be eliminated wherever possible by proper planning of the cable routes. Where crossovers are unavoidable they shall be achieved using proprietary cable ladder accessories.

2.2.3

Cable from different circuits shall never touch each other under any circumstances. Adequate spacing shall be provided to ensure that maximum heat dissipation from the cables is achieved.

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2.3 TRANSFORMERS

2.3.1

The transformers shall be supplied and installed by FEWA to FEWA specification i.e. Cast resin as appropriate with terminals suited for cable incoming and outgoing connections to DEWA specifications.

2.3.2

The transformer shall be arranged to supply load as shown on the schematic.

2.3.3

The Contractor shall be responsible for coordinating all trenches, manholes, ducts cables etc for the complete installation of the works.

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SECTION – 03

LOW VOLTAGE SWITCHGEAR

3.1 GENERAL 3.1.1

The scope of work shall cover the design, manufacture, testing in the factory, packing insurance, delivery to site, unloading, installation, testing and commissioning of a multi-panel metal clad low voltage switchboard with all necessary accessories in accordance with this technical specifications. The Contractor shall offer switchboard of a design that has been in satisfactory commercial service for a minimum period of three (3) years. Indicate export record of last three (3) years, giving contract reference, value of contract and telex/fax address of the purchaser. The Contractor shall submit with his offer notarized /attested copy of the type test certificate for the type of switchboard offered, issued by a recognized independent testing laboratory. The type test shall cover clauses 8.2.1 to 8.2.7 of IEC Publication 60439-1 and BS EN 60439-1. Moreover, switchboards shall be tested for Internal Arc Fault Containment. Certifying body shall be from ASTA or KEMA. Manufacturer shall have quality control in compliance with ISO 9001 or its approved equivalent national standard. Certificate of compliance issued by an independent agency shall be submitted. The agency shall be from west Europe, Japan or U.S.A. The switchgear shall be assembled only by an authorized panel builder of the original manufacturer and approved by the engineer.

3.1.2

3.1.3

3.1.4

3.1.5

3.2 SHOP DRAWINGS The Contractor shall submit the following information. 3.2.1 3.2.2

All technical schedules fully completed and signed. General arrangement drawing showing all important dimensions, together with mountings/accessories. 3.2.3 Details of circuit breakers. 3.2.4 Sections showing bus arrangement and LV cable compartments. 3.2.5 Earthing arrangement. 3.2.6 Details of CT’s, VT’s and relays. (where applicable). 3.2.7 Single line diagram of the complete assembly offered. 3.2.8 Brochures and technical catalogues for standard equipment offered. 3.2.9 List of accessories included in the Tender. 3.2.10 Summery of deviations from technical specification. 3.2.11 The contractor shall submit all shop drawings. 3.3 STANDARDS The contractor shall provide equipment that complies with the latest issues of IEC standards. Characteristics of design and construction, ratings and testing procedures shall meet the following IEC standards. • •

IEC 185 – current transformers IEC 186 – voltage transformers

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• • • • •

IEC 269 – low voltage fuses IEC 439 – low voltage switchgear and control gear assemblies IEC 292 – low voltage motor starters IEC 947 – low voltage switchgear and control gear Applicable local laws and regulations

3.4 ENVIRONMENT • Climatic conditions are as follows. • Maximum ambient temperature: 50°C • Maximum relative humidity: 100% • Location: Dubai, United Arab Emirates 3.5 RATING Nominal continuous current rating of the complete switchboard, circuit breakers, protective devices and bus bar shall be adequate to the environment conditions as specified in item 1.6 above. • Switchboard shall have the following ratings: • Highest system voltage

600 Volts

• Rated normal voltage

415 Volts

• Rated frequency

50 Hz

• Rated short time current

50 kA for 3 second

• System

3 phase and neutral 4 wire

3.6 TEMPERATURE RISE The temperature rise in any part or component shall comply with BS/IEC standard specifications. 3.7 PRODUCTS 3.7.1

The main switchboard shall be a complete factory assembly, built in accordance with BS 60439, tested and shipped ready for installation, including but not limited to the following:

• Main breakers • Feeder breakers • Metering 3.7.2

Switchboard shall be rated 415 volts three phase and neutral 4 wire 50 Hz with neutral solidly grounded. The equipment shall be suitable for operating on a system having a fault level of 50,000 A RMS symmetrical for three seconds (ASTA or KEMA certified).

3.7.3

Switchboard shall be of the size and number of sections indicated, and shall not exceed the dimensions shown on the drawings or specified herein.


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3.7.4

Entire switchboards shall be shipped in one section unless approval is given by the Engineer.

3.7.5

Switchboard manufacturer shall be independently certified to ISO 9000 Quality specification. The Contractor shall submit a copy of the certification to the Engineer for approval.

3.7.6

Refer to single line diagrams for rating and type of feeders required.

3.7.7

As per the single line diagram, provide utility energy meters and CT’s for each incoming section. Meters to be mounted in separate compartments in each section. All meters to be approved and be calibrated to utility requirements, fully in accordance with DEWA Regulations.

3.8 CONSTRUCTION 3.8.1

Switchboard shall be designed and manufactured to form 3 constructions for circuit breaker cubicles as defined in BS5486. Enclosures shall be constructed to BS5420 having additional gaskets and cover plates to provide a category of duty IP54. Switchboard shall hold a current type-tested ASTA certificate covering the principle elements of construction. The certificate must be obtained by the manufacturer. Third party compliance will not be acceptable.

3.8.2

Enclosure shall be made up of steel frames bolted and welded together to form a rigid free-standing dead front structure, with flush flange type sheet steel doors and cover plates as required.

3.8.3

Sections shall be 2mm zinc coated corrosion resistant treated after all forming and welding has been completed and all holes have been punched. The finish coat shall be epoxy powder paint deposited by an electrically charged procedure, both inside and outside – light blue/Grey color, RAL 7032. Paint thickness shall be 90 microns minimum.

3.8.4

Incoming cable entries to the switchboard shall be from below and the majority of outgoing circuits shall be from below with front access only unless otherwise specified.

3.8.5

Switchboard heights shall not exceed 2300mm.

3.8.6

Compartments for future breakers shall be complete with bus connections, disconnecting contacts and supporting rails, ready for the insertion of a breaker, and with insulating covers for the disconnecting contacts.

3.8.7

If required, mounting channels and hardware shall be supplied by the vendor.

3.8.8

Nameplates shall be engraved lamicoid, with black letters on a white background.

3.8.9

Nameplates for main, tie breakers, sections, cell identification and for the entire switchboard shall have letters not smaller than 13mm high. Nameplates for branch breakers, switches, pushbuttons, control devices, pilot lights and metering shall have letters not smaller than 3mm high. Nameplates shall be mechanically fixed with round head screws.


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3.8.10 Warning signs on doors and access panels shall be engraved lamicoid or enamelled steel, with white letters on a red background. 3.8.11 Control contacts, auxiliary contacts, relays and small or light mechanisms shall be enclosed and protected, and shall be accessible for repair or adjustment. 3.8.12 Provide a mimic bus configured to reflect the single line distribution of the system. The mimic bus shall be black and attached on the face of each switchboard by a heat process. Alternatively, Mimics bus shall be provided by the means of cast type aluminium profiles to be mounted on the face of each panel. Painted lines and “Dymo” tape will not be accepted. 3.8.13 Anti condensation heaters shall be provided within the assembly and shall be controlled by a panel mounted hygrostat (humidity detector) with a 50% to 100% relative humidity setting. 3.9 BUSES 3.9.1

Bus bars shall be rectangular section, hard drawn high conductivity copper and should be electro-tinned throughout length: Provision shall be made for extending the buses to future cubicles at each end of the switchboard.

3.9.2

Bus bars shall be ASTA certified for a fault rating of 50 kA for three seconds.

3.9.3

Bus bars shall be totally enclosed within sheet steel compartments to provide optimum safety against accidental contact.

3.9.4

Main and neutral bus shall be rated continuous as depicted on the drawings. (The neutral bus shall be rated same as phase bus).

3.9.5

A copper ground bus not smaller than 10 x 50mm shall be run near the bottom, the full length of the switchboard. The metal frames of all components shall be connected to the grounds bus. Provide a lug for connecting to the external ground conductors at each end of the bus.

3.9.6

Bus bars vertical and horizontal shall be fully insulated using high di-electric strength, purpose manufactured, PVC sleeves.


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3.10

AIR CIRCUIT BREAKERS

3.10.1 Air circuit breakers shall be four poles with microprocessor based protection and shall respond to true RMS value of waveform including harmonic distortion within the neutral pole. Air circuit breakers should have a control voltage of 24V to 250V AC from one unit. Air circuit breakers shall comply with EN 60947 part 2 and IEC947 Part 2. The bus coupler air circuit breakers shall be four poles, electrically operated, spring assisted withdrawable pattern. (Provided with electrical and mechanical interlocks to prevent incorrect operation and to provide safety for personnel in `Test’, `Service’, and `Withdrawn’ positions.) 3.10.2 Breakers shall be drawout type, with interlocks to prevent moving a closed breaker into or out of the connected position. 3.10.3 Breakers shall be equipped with a grounding device to solidly ground the framework before the main disconnecting contacts are engaged and to maintain the grounding until after the contacts have separated. 3.10.4 Breaker trips shall be completely self-powered with no external control power source required. If external control power is required, 110V DC batteries and charger shall be provided. Batteries to be Ni-cad type. 3.10.5 Breakers shall be provided for protection against overload, short circuits with time delay and earth faults and have the following functions: • Adjustable long time delay trip. • Adjustable short time delay trip. • Instantaneous trip; • Ground fault trip. 3.10.6 Breakers of the same type and interrupting rating shall be interchangeable. 3.10.7 Air circuit breakers shall be provided with tripping and electric closing, and shall be capable of withdrawal to the test and disconnected position with the cubicle door closed. Motor charged spring operated mechanism shall be automatically recharged immediately following their closing duty. Means shall be provided on the circuit breakers to prevent closing, unless the spring mechanism is fully charged. The facility to charge circuit breaker spring mechanism by manual means shall also be provided. All circuit breakers shall be provided with a hand operated mechanical trip device to trip the circuit breaker. 3.10.8 Breakers shall be complete with microprocessor based control unit. 3.10.9 Breakers shall be designed for operating in a 50°C ambient temperature and the contractor shall provide copies of all test certificates for the Engineer’s approval.


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3.11

MOULDED CASE CIRCUIT BREAKERS

3.11.1 Feeder circuits shall be protected by MCCB’s. 3.11.2 Circuit breakers shall comply with BS 4752, IEC 947 Part 2 and have a factory set instantaneous magnetic trip release and adjustable thermal trip. 3.11.3 Circuit breaker shall be fixed mounted type. 3.11.4 Breakers shall be provided with adjustable ground fault protection (40% - 100% of the rated current) or earth leakage protection as detailed on the drawings. 3.11.5 Interrupting capacity shall be a minimum ICU 50 kA RMS symmetrical. 3.11.6 Circuits shown as “spare” shall include a breaker of the rating indicated. 3.11.7 Air circuit breakers and moulded case circuit breakers shall be individually designed to 50°C ambient temperatures. A formal certificate will be required from the manufacturer confirming that the breakers have been suitably temperature compensated. 3.11.8 To maintain uniformity of components and maintain discrimination, all moulded case circuit breakers and air circuit breakers should be of the same manufacturer. 3.12

METERING

3.12.1 Provide all necessary current and potential transformers to operate metering and alarms. 3.12.2 Provide digital totalizing type, polyphase voltage, current frequency, power factor, kVA, kW and accumulating total of MWHR and Kw. 3.12.3 Provide line drivers for remote sensing on the BMS. Co-ordinate with BMS supplies. 3.12.4 Provide digital meters on all main incoming breakers. 3.12.5 Provide ground indicating light signals for remote alarms annunciation. 3.13

EXTERNAL CONNECTIONS

3.13.1 Provide bus extensions and bus duct flanges as required completely coordinated with the outgoing bus duct feeders. Provide bus transition section where required with bolted access panels. 3.13.2 Provide barrier type terminal blocks for all interconnecting and outgoing small wiring. Identify terminals and conductor ends by means of suitable markers, to agree with the wiring diagrams. Terminal blocks shall be accessible for inspection and testing.


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3.14

CURRENT TRANSFORMERS

3.14.1 Current transformers shall comply with IEC 185. 3.14.2 Conditional ratings of current transformers shall correspond with the switchboard rating and shall maintain overall metering accuracy as is necessary to operate relays within the tolerances specified by the manufacturer. 3.14.3 Current transformer secondary ratings shall be: • For protection

5A

• For metering

5A

3.14.4 Current transformers shall have the following accuracies as a minimum. • For Protection

Class 5P (except for REF Protection which will have PS Class CT)

• For Metering:

Class 1.0

3.14.5 Manufacturer shall ensure current transformers will operate relays correctly when set at any point within their ranges. 3.14.6 Current transformers secondary wiring shall be earthed on one side through a removable link. Where current transformers are connected in star, the star point shall be earthed through a removable link. 3.14.7 Shorting links shall be provided for each current transformer. 3.14.8 Current transformer shall be cast resin insulated. 3.15

VOLTAGE TRANSFORMERS

3.15.1 Voltage transformers shall comply with IEC 186. 3.15.2 Voltage transformers shall be suitable in rating and accuracy for their functions, loads and duties. As a minimum they shall have the following accuracies:: • Protection applications:

Class 6P

• Indication and Metering:

Class 1.0

3.15.3 Primary and secondary circuits of voltage transformers shall be protected by fuses and the secondary winding shall be earthed at one point through a removable link. 3.15.4 Voltage transformers shall be air insulated type. 3.15.5 Manufacturer shall provide MCB’s with auxiliary contacts or alternatively 4-pole MCB’s on the secondary side of the voltage transformers.


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3.16

TESTING

3.16.1 The Contractor shall submit type test certificate from a locally recognized authority from ASTA or KEMA acceptable to the Purchaser as evidence that the circuit breaker with panel has been successfully tested to relevant IEC. The certificate shall include the test results and circuit breaker performance during the tests. 3.16.2 Full type test certificate shall be made available to the Engineer at the time of inspection. The inspection may require certain type tests to be repeated at the supplier’s expense, if it is found that the offered equipment substantially differs in design and construction with the type test unit 3.16.3 LV switchboard shall be subject to inspection and testing during manufacture and after completion by the Engineer. 3.16.4 Acceptance by the Engineer of any LV switchboard shall not alleviate the manufacturer or the contractor from any performance guarantee, or from any other contractual obligations. 3.16.5 Defects as a result of testing and inspection shall be repaired and made good by the manufacturer. Failed tests shall be repeated and witnessed by the engineer or his representative prior to shipment of the LV switchboard. All costs incurred due to repeated tests shall be borne by the Contractor. All results of such repairs and repeated tests shall be documented and issued to the Engineer. 3.16.6 The engineer shall be notified 7 days in advance of any testing at the manufacturer’s plant or at site. Failure to notify the Engineer of tests may result in tests being repeated with all costs for same being borne by the Contractor. 3.16.7 Test procedure shall be as follows: • Megger test all main circuits at 2.5kV for one minute. Insulation resistance shall not be less than 10 mega ohms. • Flash test all main circuits at 2.5kV for one minute. Record leakage current. • Repeat Megger test to verify insulation resistance has not been affected by the flash test. • Functional test all circuit breakers switches, contactors, and the like. All control circuits to verify correct operation. • Primary injection test all relays, CT’s, indicating and metering instruments. 3.16.8 The original manufacturer should provide a declaration of conformity after the switchboard has been assembled by the authorised panel builder. 3.17

INSPECTION

3.17.1 Inspection procedures shall be as follows: • All conductors and cable entries and exits checked for proper routing space and all devices for proper mounting.


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• Check effectiveness of all handles, locks, interlocks, operating mechanical devices and the like. • Check all screwed and bolted connections for adequate surface contact, random checks only. • Check conformity to drawings and Engineers requirements. • Record all deficiencies. 3.17.2 Inspection and Tests (ON SITE) Prior to energizing the switchboard, perform the following checks on site: • Operate the equipment through all design functions, including remote operation, actuation of alarms and indicating devices, mechanical and electrical tripping and closing and operation of all protective devices. • Insulation resistance measurements on the buses, phase to phase and phase to earth, with all breakers in the fully connected position and contacts open. • Control circuit insulation resistance to earth. • Inspect all relays and protective devices, and verify settings in accordance with the manufacturer’s instructions and information in the Co-ordination study. • Inspect current transformers and relays for correct polarity of connections and the installation of jumpers on unused current transformer circuits and removal of jumpers on used current transformer circuits. • Simulate operations and check the logic of interlocks. • Manually close and trip each breaker checking and adjusting the main contact alignment and wiping action in accordance with the manufacturer’s instructions. • Check the phasing on both sides of each the breaker, before closing. • Flash test all main circuits at 2.5 kV for one minute on 380V switchboard and record leakage current. • Test protective relay operation for incoming air circuit breakers. 3.18

OPERATION AND MAINTENANCE MANUAL

3.18.1 Prior to delivery of the equipment the supplier shall submit to the owner six (6) sets of manuals for all equipments supplied under the contract. The manual shall be A4 size bound in a loose leaf binder or booklets suitably enclosed and shall including the following: • A complete set of all corrected drawings prepared by the supplier and approved by the Engineer. All drawings included shall be folded to fit within the binders. • Setting up, commissioning and operation instructions. • Trouble shooting procedure. • Maintenance instructions including schedules for preventive maintenance. • Complete recommended spare parts list including manufacturer's name and cata1ogue number with all required ordering information.


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3.19

MANUFACTURER Main switchboard construction and fabrication shall be manufactured and assembled by one of the following: • ABB • Merlin Gerin • General Electric • Siemens • Dorman Smith • Klockner Moller


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SECTION – 04

POWER FACTOR CORRECTION EQUIPMENT

4.1

The contractor shall supply, install, test and commission the capacitor bank complete with control equipment for automatically controlling the connection and disconnection of capacitance in response to changes in the load power factor and to correct the power factor to the required value set and approved by the local power supply authority, which is currently 0.93.

4.2

Capacitors with suitable harmonic suppression detuned series reactors are to be offered for those sections of the network, where there are harmonic generating loads like variable speed drives for elevators, UPS systems, fax machines, computers, etc. The participating vendors should check for the same from the load details furnished and furnish appropriate offers accordingly.

4.3

Power factor correction capacitors shall be of proven and established design and shall comply with requirements of IEC 831-1 and 2.

4.4

The capacitor bank shall be fully assembled and internally connected. All equipment shall be suitable for continuous operation within the specified ambient temperature.

4.5

The capacitor bank shall comprise of a cubicle with protection, control equipment and steel racks for the capacitor units. The capacitor bank shall be freestanding individual unit or part of the switchgear as indicated on the drawings

4.6

The equipment ratings shall be selected to give a generous margin to withstand the high capacitor currents due to harmonics on the system voltage.

4.7

Capacitor elements shall comprise of a self-healing metallic polypropylene film requiring no gas or liquid impregnation, an overpressure disconnect device with an HRC fuse for low current fault protection and an HRC cartridge fuse for high current fault protection, all encapsulated in plastic enclosure having double electrical insulation.

4.8

Capacitor units shall comprise of a sheet steel enclosure incorporating a number of capacitor elements. Every capacitor shall be capable of operating for prolonged period without damage at voltage 10% higher than the rated voltage.

4.9

All capacitors shall be capable of operating without damage under conditions where current through it exceeds by 15% the current corresponding to the rated voltage and frequency. All capacitors shall incorporate an internal discharge resistor. Losses shall be less than 0.7W/KVAR including discharge resistors.

4.10

The power factor controller shall be microprocessor based and shall be programmable at site. The programme shall permit to permanently measure the reactive power of the installation and control connection and disconnection of capacitor steps in order to obtain required power factor. The power factor controller shall comply with IEC 1010-1.

4.11

The power factor controller shall have ‘Automatic’ and ‘Manual’ control facility with target power factor settings from 0.80 inductive to 0.90 capacitive.

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4.12

The controller shall display power factor and energised steps.

4.13

The controller alarm contact, alarm message memory and reset function

4.14

The controller shall be panel mounted

4.15

The active filter should work on the principle of measurement of harmonic currents and generate actively a harmonic spectrum in opposite phase to the measured distorting harmonic current thereby cancelling the original harmonics.

4.16

The rating of the Active Filters should be so selected that the Total Harmonic Voltage Distortion at the point of common coupling is brought down to below the Total Harmonic Voltage Distortion limits specified in IEEE 519.

4.17

The active filter shall be of parallel configuration. The active filter shall monitor all three phases of the low voltage line current in real time by means of a Digital Signal Processor (DSP). The output of the DSP unit in combination with a micro-controller based system shall generate a pulse width modulated (PWM) signal to control power modules based on IGBT (Insulated Gate Bipolar Transistor) technology, which act as a current source. The PWM signal shall be of fixed switching frequency.

4.18

The system shall be operated under closed loop control and shall have a maximum response time of not more than 40 milliseconds. The control system shall be such that the active filter cannot be overloaded. Simultaneous filtering shall be provided for 20 individual harmonics that shall be individually programmable per harmonic up to the 50th harmonic.

4.19

The operating power factor of the active filter shall be programmable over the range 0.7 inductive to 0.7 capacitive. Both fixed and dynamic reactive power compensation shall be available for selection by the programmer.

4.20

The active filter shall be protected against over current, short-circuit; thermal overload and IGBT bridge abnormal operation. The Active Filters should be suitable for an ambient temperature of 40 deg C.

4.21

Specialist supplier and contactor are responsible for complete analysis of the system and provide the required filters.

4.22

Third harmonic filters shall be provided only if the harmonic current in neutral exceeds 33% of the phase current.

4.23

MANUFACTURER

The power factor correction equipment shall be supplied one of the following: •

ABB

•

Merlin Gerin

•

Siemens

•

Klockner Moeller

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SECTION – 05

MOTOR STARTER AND CONTROL DEVICES

5.1

The scope of work shall cover the supply, design, manufacture, testing in the factory, packing, insurance, delivery to site, unloading, installation, testing and commissioning of all components with all the necessary accessories.

5.2

Starters located indoors shall have IP 42 sheet steel enclosures. Starters located outdoors or in damp areas shall have IP 55 weather resistant enclosures.

5.3

Enclosures shall be finished in tight blue/Gray (RAL 7032) epoxy powder coating.

5.4

Starters and control devices located in finished areas shall be flush-mounted.

5.5

Starters shall be equipped with one manual reset thermal overload relay in each ungrounded conductor. Starter shall have utilization category of AC-3.

5.6

Starters shall be automatic air break type as specified or as shown on the drawings.

5.7

Magnetic starters shall include main contactor, fused 240V control transformer, auxiliary contacts, door switches, and cover mounted control devices as shown on the drawings.

5.8

Magnetic starters shall include main contactor, fused 240V .control transformer and ' cover mounted hand-off-auto switch and red "run" indicating tight.

5.9

Combination starters shall include a molded case circuit breaker as described in the article on disconnect switches with an interrupting capacity of 35kA for 1 second RMS symmetrical.

5.10 Starters for three phase motors shall have maximum starting current characteristics of five to six times full load current. 5.11 Where an external control voltage is present in a starter, provide a warning nameplate and Mylar barriers or a door disconnect auxiliary switch to interrupt the control circuit. 5.12 Select overload relays according to code and the recommendations of the manufacturer, based on motor nameplate full load current. 5.13 MANUFACTURERS Starters and control devices shall be of one manufacturer as followings: • GE • Allen Bradley • Telemecanique

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SECTION – 06

DISCONNECT SWITCHES

6.1

Provide disconnect switches local to all motors, starters and electrical equipment where required to meet Code regulations and jurisdictional authorities, whether supplied or installed under the electrical Division or any other Division.

6.2

Disconnect switches (isolators) shall be manufactured to IEC and British standards.

6.3

Disconnect switches. Shall be heavy duty (AC23), in rust protected sheet steel (IP 44) general purpose enclosure finished in light blue/grey RAL 7032.

6.4

Switches shall be quick make, quick break action. Provision shall be made for padlocking in either the 'On' or 'Off position.

6.5

Operating handle shall be interlocked to prevent doors from being opened when switch is closed. Provision shall be made to defeat this interlock with a screwdriver.

6.6

Fuse clips shall be designed for HRC BS 88 fuses without adapters and shall have standard code fuse rejection feature.

6.7

Switches mounted outside or in damp, or unconditioned dusty locations shall be supplied in weather resistant, IP65 enclosures.

6.8

MANUFACTURER Switches shall be manufactured by one of the following:

•

Moeller

•

De1ta

•

MK

•

Federal Electric

•

ABB

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SECTION – 07

AUTOMATIC TRANSFER SWITCH

7.1

The automatic transfer switches shall be 415V, three phase, and neutral 4 pole contactor type in double throw arrangement with microprocessor controls.

7.2

The switches shall be transfer-bypass type, with draw out transfer mechanism and controls. Bypass switches shall permit maintenance of the transfer switching and controls without interruption of service.

7.3

The enclosures shall be (IP42), finished in light Gray enamel. The front panel shall be hinged for access for inspection & maintenance. All sections shall be 2mm zinc coated with corrosion resistant treatment.

7.4

The switches shall be double throw, mechanically and electrically interlocked, anD mechanically held in both positions.

7.5

Failure of any electrical component or disarrangement of any part shall not permit the switch to remain in a neutral position.

7.6

The operating mechanism shall obtain its power from the source to which the load is being transferred.

7.7

An auxiliary contact shall close, starting the engine -alternator set, when the voltage in any phase falls to 75% of rated for an adjustable period of 0.5-6 seconds, factory set a 2 seconds. When the alternator voltage has risen to 90% of rated on all phases, the switches shall transfer from the normal to the emergency source.

7.8

The switch shall retransfer to the nominal source when all phases have remained above 90% of rated, for an adjustable time period of 0 to 30 minutes.

7.9

The switch shall be equipped with a timer to keep the engine running for an adjustable period of 0 to 5 minutes after the load has been retransferred to the normal source.

7.10

The switch shall be equipped with an in-phase monitor or equivalent arrangement for retransferring to the normal source.

7.11

One 4-position off-auto-run-test control switch shall be provided on the front of the enclosure. The run position shall start the engine without operating the transfer switch. The test position shall simulate a power failure and shall transfer the load to the emergency source.

7.12

The switch shall transfer when the voltage in any phase falls to 75% of rated, and shall retransfer when all phases have remained above 90% of rated, for an adjustable time period of a to 30 minutes.

7.13

The switch shall be equipped with a timer to delay transfer for an adjustable period of 0 to 30 seconds, to prevent transferring during testing of the standby power system.

7.14

One 3-position off-auto-test switch shall be provided on the front of the enclosure.

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7.15

All control gear shall be calibrated for operating conditions in a 50°C ambient temperature.

7.16

The automatic load transfer equipment shall be designed to comply with the following criteria: •

Monitor voltage of normal power supply.

•

Initiate cranking of the generator on failure of normal power.

•

Transfer load from normal supply to generator when it reaches its rated speed voltage and frequency.

•

Re-transfer load from generator to normal power supply when normal power is restored.

•

Shut down generator unit.

7.17

Co-ordinate with generator supplier to ensure compatibility for control operation.

7.18

The automatic transfer switch shall be by an approved following: •

ABB

•

Caterpillar

•

Schneider Electric

•

Zenith Control (GE)

•

Moeller

manufacturer by one of the

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SECTION - 08

MOTOR CONTROL CENTERS AND CONT. PANEL

8.1

GENERAL

8.1.1

Assemblies and associated equipment shall conform to the requirements of the latest edition of the following standards and codes where applicable.

•

IEC 185

- Current transformers

•

IEC 186

- Voltage transformers

•

IEC 269

- Low voltage fuses

•

IEC 439

- Low voltage switch gear and control gear assemblies

•

IEC 292

- Low voltage motor starters BS – 4941)

•

IEC 408

- Low voltage air break switches, air break disconnect, air Break switch disconnected and fuse combination switches.

•

IEC 947

- Low voltage switchgear and control gear BS5486-Motor Control Centre Construction – Form4

8.1.2

ENVIRONMENT Climatic conditions are as follows: - Maximum ambient temperature: 50°C - Maximum relative humidity: 100% -

Location: Ajman, UAE.

8.1.3

Control Centers shall be suitable for use on a 380 Volt three phase and neutral, (TP/N) 4- wire 50Hz, solidly earthed AC system.

8.1.4

Equipment supplied shall comply with the relevant British Standards and DEWA regulations.

8.1.5

Bus bars, structures, enclosures and equipment shall be adequate to withstand the stresses imposed by short circuit of 50kA RMS for 1 second ASTA certified.

8.1.6

Control Centers shall be complete with all interconnecting wiring and shall have terminals in each compartment for control wiring and power connections.

8.1.7

Refer to Contract drawing for details of motor control Centers.

8.1.8

Motor Control Centre shall have the capability to be integrated with the Integrated Building Automation System (IBMS) as shown in the Contract drawings and IBAS schedules.

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8.2

CONSTRUCTION

8.2.1

Motor control centers shall be modular construction factory built assemblies, floor mounted, free standing with minimum degree of protection IP54 for indoor areas. The control centers shall be built to form 4 type 6 constructions.

8.2.2

Control centers shall be based on a unit grid system with a maximum height of 2200mm. The top and bottom frames shall be fitted with gland plates or cover plates depending on the cable entry. The top frame shall have provision for fitting lifting eye bolts and the bottom frame with mounting holes for framing foundation bolts.

8.2.3

Enclosures shall be made of steel frames bolted and welded together to form a rigid free-standing dead front structure, with flush, flange type sheet steel doors and cover plates as required. All sections shall be of uniform dimension and appearance.

8.2.4

Sections shall be 2mm zinc coated corrosion resistant treated after all forming and welding has been completed and all holes have been punched.

8.2.5

Functional units shall be plug-in mounted in a multi-tier modular assemblies or compartments prefabricated to accept the complete range of manufacturer's products.

8.2.6

Mounting assemblies, together with their functional units shall be bolted to the basic structure. The structure shall be 16 basic modules high and capable of accepting mounting assemblies that are in multiples' of a basic module.

8.2.7

Functional units shall have rotary front operating handles interlocked to prevent opening the unit when the switching device is closed. Side and rear covers shall completely enclose all live parts. Provision shall be made for padlocking the operating handles with the switching device open.

8.2.8

Steelwork shall pass through four stages of finishing Chemical spray, degreasing, iron phosphate and electrostatic ally applied top coat. The top coat shall be light blue/Gray -RAL 7032. Inside color shall be white.

8.2.9

Unless otherwise indicated on the drawings, cable entries shall be from the top, with cable access from the front.

8.2.10

Starter feeder power and control cables shall be brought out neatly to terminals which shall be segregated by a steel enclosure.

8.2.11

Provide engraved Lamicoid nameplates with black letters on white background, as follows:

•

Main nameplate, 13mm letters, mounted on front of upper wiring compartment.

•

Unit nameplates, 3mm letters, mounted on unit doors or cover plates.

•

Nameplates shall be mechanically fixed with round head screw. Nameplates shall include equipment numbers and names in agreement with the riser diagrams.

8.2.12

Indicating lamps, push buttons, control and selector switches shall be neatly and logically flush mounted on front of the respective equipment compartment doors.

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8.2.13

Control centers shall be complete with cable supports, cleats, glands clamps, lugs and the like for the termination of all incoming and outgoing cables. Sizes and types shall be as specified on the drawings for power, control, protection, indication and alarm cables.

8.2.14

Anti-condensation heaters shall be provided within the assembly and shall be controlled by a panel mounted hygrostat (humidity detector) with a 50% to 100% relative humidity setting.

8.3

BUSBARS

8.3.1

Main horizontal busbars shall be insulated hard drawn copper with silver plated joints running the full length of the switchboards. Current rating as shown in the drawings rated for 50ºC ambient. Supports shall be fibreglass reinforced, moulded type material, and shall be totally enclosed in a separate sheet steel compartment, braced for a fault level of 50 kA RMS (symmetrical).

8.3.2

Vertical and horizontal busbars shall be fully insulated using either high dielectric strength purpose manufactured rigid PVC sections or coating applied by the fluidized bed principle. Vertical busbars shall be hard drawn copper with silver plated joints, suitable connected to the main horizontal bus-bar run in a separate totally enclosed sheet steel enclosure. The busbars shall be supported at short intervals by fibreglass reinforced moulded type material.

8.3.3

Vertical busbar shall be of the same size and current rating as the horizontal busbar assemblies.

8.3.4

A copper earth busbar not smaller than 6 x 50mm shall be run across the bottom of the control Centers. The metal enclosure and bases of all equipment shall be connected to the earth bus.

8.3.5

Provision shall be made for extending the main and ground buses at either end of the control centre.

8.4

EQUIPMENT

8.4.1

Starters, contactors, protective devices, control transformers, pushbuttons, indicating lights and the like shall be in accordance with the applicable sections and standards of this Specification.

8.4.2

Control and switching units shall be modular plug-in type, secured in place by captive screws or speed fasteners. Control and switching units of the same size shall be interchangeable.

8.4.3

Provide insulating barriers and door switches where required to isolate and Interrupt remote control voltages. Identify remote voltage sources by means of engraved lamicoid warning signs on the compartment doors, with 3mm white letters on red background.

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8.4.4

Provide spaces for the future addition of control or switching units totalling at least 20% of the active spaces in the control centre. Future spaces shall be complete with bus, guide rails and all required parts, ready to receive a starter.

8.4.5

MCCB’s feeding motors shall be motor Duty Type and shall be as detailed on the drawings, manually operated, fixed type with thermal and magnetic release for short circuits protection and without overload release. Short circuit breaking capacity shall not be less than 50kA for 1 sec. at 380V, 50Hz.

8.4.6

Starter feeders shall be equipped with but not limited to:

•

Main MCCB with door interlocked rotary handle. (Lockable in the off position).

•

Contactors for direct on-line starting or star-delta starting as shown on the drawings.

•

Thermal overload relay with built in single phasing prevention feature.

•

Hand-Off-Auto control switch.

•

Common duty selector switch. (Where applicable).

•

Thermister relay. (where applicable)

•

RUN/TRIP lamps.

•

Auto changeover arrangement.(where applicable)

8.4.7

Controls within each starter shall be 24VAC fed via a 220/24V transformer located in each functional unit.

8.4.8

Current transformers shall comply with IEC 185.

8.4.9

The conditional ratings of current transformers shall correspond with the F.B.A. rating, and shall maintain metering accuracy or as required to operate relays within the tolerances specified by the manufacturer.

8.4.10

Current transformers shall have the following accuracies as a minimum:

•

Protection applications

: Class 5P.

•

Indication

: Class 3

•

Metering

: Class 0.5

8.4.11

Manufacturer shall ensure that the current transformers will operate relays correctly when set at any point within their ranges.

8.4.12

Current transformers secondary wiring shall be earthed on one side through a removable link. Where current transformers are connected in star, the star point shall be earthed through a removable link.

8.4.13

Shorting links shall be provided for each current transformer.

8.4.14

Current transformer shall be cast resin insulated.

8.4.15

Voltage transformers shall comply with IEC 186.

8.4.16

Voltage transformers shall be suitable in rating and accuracy for their functions, loads and duties. As a minimum they shall have the following accuracies:

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•

Protection Applications

: Class 6P

•

Indication and Metering

: Class 0.5

8.4.17

Primary and secondary circuits of the voltage transformers shall be protected by fuses and the secondary winding shall be earthed at one point through removable ink.

8.4.18

Voltage transformers shall be cast resin insulated.

8.4.19

Manufacturers shall provide MCB’s with auxiliary contacts or alternatively 4-pole MCB’s on the secondary side of the voltage transformers.

8.4.20

Provide three spare fuses of each rating used clipped inside each panel.

8.4.21

Provide six spare indicator lamps and transformers clipped inside each panel.

8.4.22

Indicators shall be of the integral transformer type.

8.4.23

For details of power factor correction refer to Section 16686.

8.4.24

Control wiring shall be suitably rated (1.5mm² as a min.). Color coded PVC insulated 600/1000V multi-strand flexible cable runs in PVC trunking internal within the panels only.

8.5

INSPECTION & TESTING

8.5.1

Control centers shall be subject to inspection and testing during manufacture and after completion by the Engineer or his appointed representative. All expenses for executive travel, accommodation, visa and the like for one visit in connection with the inspection and testing of the first lot shall be included in the Tender by the Contractor.

8.5.2

Acceptance by the Engineer or his appointed representative of any control centre shall not alleviate the manufacturer or the contractor from any performance guarantee, or from any other contractual obligations.

8.5.3

Defects as a result of testing and inspection shall be repaired and made good by the manufacturer. Failed tests shall be repeated and witnessed by the Engineer, or his representative prior to shipment of the control centers. All costs incurred due to repeated tests shall be borne by the Contractor. All results of such repairs and repeated tests shall be documented and issued to the Engineer.

8.5.4

The Engineer shall be notified 14 days in advance of any testing at the manufacturer’s plant of at site. Failure to notify the engineer of tests may result in tests being repeated with all costs for same being borne by the Contractor.

8.5.5

Test procedure shall be as follows:

•

Complete point to point check of all control wiring.

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•

Meger test all control and dower circuits at 1000 volts for 1 minute with all electronic devices disconnected. Insulation resistance shall not be less than 10 megohms.

•

Functional test all circuit breakers, switches, contactors, control circuit logic, indicating tights, push buttons and the like to verify correct operation .

•

Primary injection tests of all relays, CT’s, indicating and metering instruments.

8.6

ACCESSORIES

Provide any special tools in duplicate. The standard accessories to be supplied with each control centre shall be stated in the tender. Tendered shall furnish a list of recommended spare parts for four years maintenance. 8.7

APPROVAL OF DRAWINGS

Within a month from the commercial date, or other period as may be agreed with the Engineer, the Contractor shall submit the following drawings and/of particulars: 8.7.1

Detailed technical specifications.

8.7.2

Technical schedule.

8.7.3

Testing schedule procedure.

8.7.4

List of drawings corresponding to all drawings submitted by the Contractor with the Tender.

8.7.5

Outline general arrangement, sections and detailed drawings for the control centers.

8.7.6

Drawings showing the construction of the control centers and terminal arrangements with details of all accessories.

8.7.7

Single line diagram showing all auxiliary devices and the connections.

8.7.8

Details of cable terminations and fittings.

8.7.9

Details of anti-corrosion protection and painting specification.

8.7.10

Drawings shall be scaled and fully detailed. All important dimensions shall be given in metric units and the materials of which each part is to be constructed shall be indicated. Drawings shall not exceed 750mm in any dimensioned, and shall bear approved contract reference.

8.7.11

Six (6) sets of drawings for approval shall be submitted. After having been approved, the Contractor shall supply as many corrected copies as required by the Engineer. At least one copy shall be reproducible tracing. A minimum period of ten (10) days shall be allowed for study and comments/approval.

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8.8

OPERATION AND MAINTENANCE MANUAL

8.8.1

Prior to delivery of the equipment the Contractor shall submit to the Owner six (6) sets of manuals for all equipment supplied under the contract. The manual shall be A4 size bound in a loose leaf binder or booklets suitably enclosed and shall include the following:

8.8.2

A complete set of all corrected drawings prepared by the supplier and approved, by the Engineer. All drawings included shall be folded to fit within the binders.

8.8.3

Setting up, commissioning and operation instructions.

8.8.4

Trouble shooting procedure.

8.8.5

Maintenance instructions including schedules for preventive maintenance.

8.8.6

Complete recommended spare parts list including manufacturer's name and catalogue number with all required ordering information.

8.8.7

Operation and maintenance manuals shall be prepared to allow the purchaser and operators to truly understand the product, its theory of operations, its application and performance.

8.9

MANUFACTURER Motor control centers and control panels shall be manufactured by one of the following:

•

ABB

•

Schneider Electric

•

Cutler Hammer

•

Siemens

•

Moeller

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SECTION – 09 9.1

9.2

SUB-SWITCH BOARD

Assemblies and the associated equipment shall conform to the requirements of the latest edition of the following standards where applicable: •

IEC 185

-

Current transformers

•

IEC 186

-

Voltage transformers

•

IEC 269

-

Low voltage fuses

•

IEC 439

-

Low voltage switch gear and control gear assemblies.

•

IEC 292

-

Low voltage motor starters

•

IEC 941

-

Low voltage switch gear and control gear .

•

Applicable local laws and regulations

ENVIRONMENT Climatic conditions are as follows: •

Maximum ambient temperature: 50°C

•

Maximum relative humidity: 100%

•

Location: Dubai, UAE.

9.3

Sub-switch boards shall be manufactured BS5486 Part 1 with Degree of Protection to IP 42, BS 5420 and IEC529.

9.4

Refer to single line diagram for rating and type of feeders required.

9.5

Equipment shall be indoor type 380 volt, 3 phase and neutral (TP/N), 4 wire, 50 Hz earth wire system with neutral solidly earthed and a withstand rating of 25 kA RMS symmetrical (ASTA certified) for one second or as specified.

9.6

Sub-switchboards shall be wall mounted unless noted otherwise on the drawings, metal enclosed, tamperproof, dead front type and separation to IEC439.1 form 2, Type 2.

9.7

Sections shall be 2mm zinc coated corrosion resistant treat after all forming and welding have been completed and all holes have been punched. The finish coat shall be epoxy powder paint deposited by an electrically charged procedure both inside and outside light blue/grey color RAL 7032.

9.8

Main incoming section shall contain a system service circuit breaker with thermal magnetic protection.

9.9

Busbars shall be copper (size as indicated on the drawings),

9.10

Provide a copper earth bus extending the full width of the cubicle, and located at the bottom, with lugs at each end for earth cable connections.

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9.11

Switchboards shall be factory assembled at the manufacturer's factory.

9.12

Ensure sufficient gladding and termination facilities are available for the main incoming cables.

9.13

Removable gland plates shall be provided at the top and bottom of all panel boards enclosures for cable gland termination.

9.14

Name plates for the sub main switchboards and for each outgoing to be fixed and shall be engraved lamicoid, with white letters on a black background according to DEWA regulations.

9.15

MANUFACTURER Sub switchboards shall be manufactured by the same manufacturer appointed to provide the main switchboards.

9.15.1 Manufacturer of the equipment shall be independently certified to ISO 9001/BS 5750 Quality specification. 9.15.2 Routine tests as specified in standards (see serial number) shall be carried out at manufacturer's works. 9.15.3 The sub-switchboards constructing and fabrication shall be as assembled by one of the following: •

ABB

•

Merlin Gerin

•

General Electric

•

Siemens

•

Dorman Smith

•

Klockner Moeller

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Part IIB Particular Specifications for MEP Works

SECTION – 10

DISTRIBUTION BOARD

10.1

Distribution boards shall be manufactured to comply with BS EN 604 39-3 and BS 5486 Part 12 with degree of protection to IP 42 in conditioned areas and IP 55 in unconditioned areas, such as plant rooms, service rooms, car park, store area etc.

10.2

Refer to distribution board’s schedules for rating and type of feeders required.

10.3

Type, mains, ampere capacity, branch circuit rating and total number of circuits shall be as shown on schedules.

10.4

Distribution boards shall:

10.4.1

Have dead front sheet steel enclosure with flush doors, concealed hinges, flush lock and concealed trim bolts.

10.4.2

Be 2.0 mm zinc coated sheet steel corrosion resistant treated after all forming and welding have been completed and all holes have been punched. The finish coat shall be epoxy-powdered paint deposited by an electrically charged procedure, both inside and outside -light blue/grey color, RAL 7032 and subject to the engineer’s approval.

10.4.3

Be rated for operation on a 415-volt, 3 phase and neutral (TP/N), 4-wire system, with neutral solidly earthed.

10.4.4

Have bus bar and connections of high conductivity tin plated copper mounted on heavy duty glass polyester supports. Bus joints and connections shall be bolted with high strength bolts and Belleville washers: Provide double sized neutral busbar where indicated on schedule. Neutral bus bar shall have one terminal per outgoing way.

10.4.5

Flush or surface mounted as shown on the drawings or as required for the area and shall have adjustable trim clamps.

10.4.6

Be complete with a directory mounted on the inside of the door in a metal frame: with a clear plastic cover. After completion of the wiring, type the directory showing clearly the description of each circuit controlled from the panel.

10.4.7

Be assembled under license to the supplier of the equipment.

10.4.8

Have trim and doors finished with epoxy coated powder painted-light blue/grey colour.

10.4.9

Have suitably size copper earth bars running full height of the board with one incoming terminal and one per outgoing way plus earth studs for additional connections.

10.4.10 Have a maximum depth of 150mm or as permissible by wall depth as shown on drawings. 10.5

Where more than one section is required, bolt sections together to form a rigid assembly complete with all necessary interconnections.

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10.6

Where more than one section required bolt sections together to form a rigid assembly.

10.7

Name plate shall be engraved lamicoid, with white letters on a black background (according to FEWA regulations).

10.8

Miniature Circuit Breakers

10.8.1

Comply with BS EN 60898 & BS 3871

10.8.2

Be quick make quick break moulded case type, with thermal magnetic trips. Two and three pole breakers shall have a common trip and single operating handle.

10.8.3

Have plug in connections to the bus bars.

10.8.4

Be ambient temperature corrected. Details of certificates shall be handed to the Engineer for approval.

10.8.5

Be instantaneous trip type ‘C' with a minimum short, circuit rating of 9 kA.

10.9

Residual current circuit breakers shall comply with E N 60898 or EN 61 008.

10.10

Main breakers, switches and contactors shall comply with the applicable Sections of this specification.

10.11

Branch circuits indicated as “Spare" shall include a breaker of the rating indicated. Branch circuits indicated "Space" shall have a cover, and shall be ready to receive breaker of the rating indicated. "Spaces" in fused switch panels shall include a blank door or cover.

10.12

Power circuits shall be protected by combined MCB/30mA RCD.

10.13

Lighting circuits shall be protected by 100mA RCD’s refer to schedules for grouping of circuits.

10.14

Manufacturer

Distribution board, circuit breakers and switches shall be manufactured by one of the following: •

ABB

•

Hager

•

Merlin Gerin

10.14.1 Manufacturer of the equipment shall be independently certified to ISO 9001/BS 5750 Quality specification. 10.14.2 Routine tests as specified in applicable standard specifications shall be carried out at manufacturer’s works.

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SECTION – 11

PLUG-IN BUS WAYS

Not Applicable

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SECTION – 12 12.1

CABLE TRAY / LADDER AND FITTING

SUBMITTALS a. Product data for each component. b. Designate components and accessories, including clamps, brackets, fittings etc. to complete the system. c. Co-ordination drawings, showing accurately scaled Cable Ladder/trays layout and relationships between components and adjacent structural and mechanical elements. d. Maintenance data for cable Ladder and trays, for inclusion in 'Operation & Maintenance Manual' include detailed manufacturer's instruction on tightening connections. e. Quality assurance f.

The manufacturer should have a long and proven record conforming to ISO 9001 standards.

g. Listing and labelling: Provide products specified that are listed and labelled. h. Single Source responsibility: All Cable Ladder and trays components shall be the product of a single manufacturer. i.

Sequencing & scheduling

j.

Co-ordinate layout and installation of Cable Ladder with other installations.

k. Revise locations and elevations from those indicated as required to suit field, conditions and as approved by the Engineer. 12.2

MATERIALS

12.2.1

The Cable ladder/tray system shall be complete with all necessary sizes of ladders/trays and the necessary accessories like Support Bracket, Profile Clamps, Joints, Couplings, Bends, End covers, Fittings etc. required for the installation.

12.2.2

The Cable ladder and tray system shall be Hot Dip Galvanized Steel according to BS729 1971 specifications including all internal surfaces. The thickness of the sheet steel shall be a minimum of 1 Metric Gauge for all sizes of ladders. The reinforcement of the ladder shall be by the hexagonal profile of the ladder supporting the rungs. Cable Ladder\tray widths to be as indicated by manufacturer and allowing for 30% spare capacity for future additional cables.

12.2.3

The Cable Ladders/trays should have a high resistance against Ultra Violet radiation of the sun.

12.2.4

The Cable/Ladders trays shall be connected to each other in such a way that the electrical earth connectivity is continuously maintained.

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12.2.5

Where cables enter and leave Cable Ladders/trays, the electrical Contractor shall ensure that no sharp edges are carrying the weight of the cables or that cables subjected to any vibration are in a position where they could be affected by sharp edges.

12.2.6

The Cable Ladders/trays may either be run horizontally and supported from the ceiling, or cantilever wall brackets or supported directly on top of cantilever brackets or mounted vertically as required. Fixing will be such that there will be no perceptible deflection on the ladder when all cables are in position. A safety factor of 2 shall be considered during design of the ladder such that, with a uniformly distributed load of 120 Kg/m, the ladder can take a point load of 100 Kg at a middle span without deformation.

12.2.7

Where Cable ladders/trays pass through walls of a specific fire resistance, the electrical Contractor shall conform according to the Local Fire Regulation Norms.

12.2.8

The various accessories shall be of the same material as that of the Cable Ladder trays.

12.2.9

A multistage, stringently controlled pretreatment process (including degreasing rinsing pickling -rinsing -fluxing -drying, etc.} to be carried out prior to hot dip galvanizing, to , ensure a very high quality of the galvanized product and to obtain the specified micron thickness of zinc.

12.2.10 Protect steel hardware against corrosion by galvanizing conforming to BS 729. 12.2.11 Fabricate Cable Ladder/trays products with rounded edges and smooth surfaces.

12.3

CABLE LADDER / TRAYS ACCESSORIES

•

Fittings: Tees, Crosses, Risers, Elbows and other fittings as indicated, same manufactured as the Cable Ladder/trays and shall be specifically designed for the type of Ladder/tray used.

•

Cable Ladder/tray supports and connectors, as recommended by Cable Ladder/tray manufacturer.

12.4

MANUFACTURER All cable tray and fittings shall be manufactured by one of the following: . - Swift - Davis - Wibe

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12.5

`EXECUTION

12.5.1

Accessories including bends, intersections, tees, risers and reducing sections shall be purpose-made by the tray manufacturer. Only one manufacturer's tray and accessories shall be used.

12.5.2

Sizing of cable trays shall allow 30% spare capacity for future cables.

12.5.3

Care shall be taken to avoid any electrolytic action between dissimilar metals. Under no circumstances shall any copper sheathed cable or fitting be in direct contact with the galvanizing.

12.5.4

Off-sets and bends shall be sized to allow for the minimum permissible radius of the largest cable on the tray. Cables shall retain their relative positions on bends and sweeps.

12.5.5

Earth continuity shall be maintained at all joints with suitable earthling links.

12.5.6

Cable trays shall be cut along a line of plain metal and not through perforations. Burrs or sharp edges shall be removed prior to the installation of tray sections or accessories.

12.5.7

Bushing shall be provided through all holes cut in the body of the tray.

12.5.8

Cable tray shall be made good at all joints or holes by first treating the surfaces with a suitable rust proofing agent, then applying finishes comparable to the remainder of the surface.

12.5.9

A minimum space of 75mm shall be allowed between trays and structures to provide for securing cable and for general maintenance.

12.5.10 Cable tray shall be secured to galvanized steel or stainless steel supports, fixed to the structure at not more than 3.0m intervals, depending on cable tray thickness. 12.5.11 Mid span joints shall be avoided. Joints shall be positioned as close to the support as practical. Fixing of supports shall utilize "Rawlbolts" or equal. 12.5.12 Alternatively, proprietary steel channel may be used, permitting easy adjustment and modification. 12.5.13 Proprietary clamps fixing on to the flanges of structural members may be used. 12.5.14 All metal work fixing bolt and the like shall be suitably primed and painted with two coats of zinc-enriched paint. 12.5.15 Cables shall be installed on trays in a single layer with spacing between cables of 1 times the largest cable diameter in accordance with the IEE Wiring Regulations, using plastic coated, metal reinforced clips or saddles and by proprietary cleats of a pattern recommended by the cable manufacturer. 12.5.16 Not more than four cables shall be secured by a single clip or saddle. Binding tape fixings must not be used. On vertical tray installations load-bearing cleats or saddles shall be used and securely fixed to the tray.

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12.5.17 Provide, cable tray expansion joints at all locations where the tray crosses a building expansion joint and at other locations recommended by the manufacturer. 12.5.18 Where cables in tray pass through a floor or fire barrier interrupt the tray and provide an Electro tray cable transit with openings sized for the cables. 12.5.19 Protect cables against mechanical damage for a minimum distance of 1800mm. above finished floor level. 12.5.20 Provide ventilated galvanized sun shield cover plates on all cable trays exposed to the sun.

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SECTION – 13

CONDUITS / TRUNKING AND FITTING

13.1

MATERIALS

13.1.1

Surface conduits shall be heavy gauge hot dipped galvanized rigid steel Class 4 manufactured in accordance with BS 4568 Part 1.

13.1.2

Conduits run in or under floor slabs, or in poured concrete walls shall be high impact PVC type, minimum 1.7mm wall thickness manufactured in accordance with as 4607 and BS6099.

13.1.3

Use flexible steel conduit with inside earth conductor for final connections to motors. Lengths shall not exceed 500mm.

13.1.4

Use liquid-tight PVC jacketed flexible conduit with inside earth conductor for connections to sump pumps or other equipment in damp locations.

13.1.5

Metal cable trunking shall be manufactured from sheet steel in accordance with BS 4678.

13.1.6

Gauges shall be 1.6mm thickness up to 100mm x 100mm or equivalent cross sectional area, and 2mm thickness for sizes over 100mm x 100mm.

13.1.7

Protection against corrosion shall be hot dip zinc coating.

13.1.8

Support and hangers shall be stainless steel or galvanized steel.

13.1.9

Plastic cable trunking shall be manufactured from heavy gauge high impact quality, self-extinguishing, extruded PVC compound. Trunking shall be smooth inside and outside and fitted with drip-proof covers manufactured in accordance with BS 4678 Part 4.

13.1.10

All conduit and trunking in unconditioned, unfinished areas such as plant rooms electrical rooms and the like shall be painted with one coat of metal primer after installation.

13.2

MANUFACTURER

All conduit and trunking including fittings shall be manufactured by-one of the following: •

EGA Tube

•

Decoduct

•

Marshall Tuflex

•

Clipsal

13.3

EXECUTION

13.3.1

Make bends and offsets with a hickey or power bender, without flattening or denting conduits.

13.3.2

Surface conduits shall be supported by distance spacing saddles fixed at intervals not exceeding that specified in the IEE wiring regulations.

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13.3.3

Attach clamps to masonry walls by means of expansion shields. Use beam clamps or Erico 'Caddy Fasteners' to attach conduits to exposed steel work.

13.3.4

Provide expansion couplings with bonding jumpers and clamps for conduits crossing building expansion joints. Refer to structural drawings for details.

13.3.5

Provide conduit fittings with suitable covers on runs of exposed conduit. Conduit fittings shall be of a type suitable for its particular environment. Covers shall be located so they will not be blocked by the future installation of additional conduits.

13.3.6

Running couplers with lock nuts shall not be permitted. Only three piece conduit unions shall be accepted.

13.3.7

Run conduit in finished areas concealed In building fabric and above suspended ceilings.

13.3.8

All areas shall be considered finished unless indicated otherwise. Electrical rooms, mechanical rooms, stores, lift motor room and the like shall be classed as unfinished areas.

13.3.9

Run exposed conduits in groups, parallel to building lines, accurately in line and level.

13.3.10

Install conduits so there is no interference with access openings in ceilings, removal of ceiling tiles, or access to equipment in the ceiling space.

13.3.11

Do not install conduit within 150mm of water or heating pipes. Where crossings are unavoidable, maintain a minimum distance of 150mm from the pipe covering.

13.3.12

Requirements governing the installation of conduits apply equally to surface or exposed cable Installations.

13.3.13

Protect conduit stub-ups from damage during construction, and seal the ends with plastic plugs or other approved devices to prevent the entrance of foreign material. Taping or similar protection is not acceptable.

13.3.14

Where conduits pass through a water proof membrane, install sleeves with a 50 mm wide collar continuously welded all around, at membrane level. Ensure that the membrane is dressed over the color. Sleeves shall be sized large enough to allow free passage of the conduits. Make the sleeves watertight with sealer after the conduits are installed.

13.3.15

Where conduits pass through other floor slabs or fire wall, place seal into the concrete or pass through a sleeve. Sleeves shall be high density plastic, with flange for attaching to formwork or structure. Pack the sleeve with fireproof packing and sealant as approved by Civil Defence.

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13.3.16

Only the general routing and location of conduits are indicated. Install all conduits so as to provide a maximum head room and minimum interference with in the space. Install conduits as close to the structure as possible to minimize furring.

13.3.17

Replace, at no change to the contract price, any conduit or cable which, in the opinion of the Engineer is not installed properly.

13.3.18

Install a nylon fish cord in each empty conduit. Each conduit shall have a cap and bushing at each end.

13.3.19

Conduits concealed in plaster walls shall have a minimum 15mm cover along its whole length. Horizontal runs shall be avoided.

13.3.20

During construction, identify conduits with sprayed on color at both terminations immediately after installation. The following color code shall be used:

-

Electric power

-

black

-

Fire alarm and smoke detection

-

red

-

Low voltage system, PA, clock, L V switching, intercom

-

yellow

-

Isolated or ungrounded systems

-

orange

-

Earthing

-

green

13.3.21

Where conduits are connected to trunking, steel boxes, panels, switch gear, or any item not having a tapped entry of 6mm or less, the connections shall be made by long threaded male brass bushings with a coupling and serrated spring washer after removing paint with a purpose-made tool.

13.3.22

Bushings shall be tightened with a tool specifically designed for those purpose pliers or serrated wrenches shall not be allowed.

13.3.23

Sufficient draw-in boxes shall be provided to permit easy wiring as followings:

-

No. of right-angled bends

-

Nil

10m

-

1

10m

-

2

6m

Max. distance between draw boxes

13.3.24

For clarification: a double offset in a conduit run constitutes the equivalent of one right-angled bend.

13.3.25

Not more than two right-angled bends or 10m length of conduit shall be permitted between draw boxes. Vertical conduit runs more than 3.0m shall provide cable support using draw-in box.

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13.3.26

Each bend, offset, adapter box, conduit box and the like, shall be supported 15Ø mm (approx.) from each side.

13.3.27

Saddles and boxes shall be secured by sheradised class 1 or stainless steel screws 30mm x No.8 minimum or equal.

13.3.28

A separate green and yellow insulated protective conductor shall be installed within the trunking system for each circuit and services.

13.3.29

Conduit capacity shall be in accordance with BS 7631/IEE wiring regulations.

13.4

METAL TRUNKING INSTALLATION

13.4.1

Trunking runs shall be installed neatly on the surface and be truly vertical, horizontal or parallel with the features of the building.

13.4.2

Trunking shall be sized in accordance with the IEE wiring regulations for submain, 600/1000 V grade distribution cables .A space full factor of 45% shall not be exceeded. For sub-circuit, 4501750V grade wiring, to BS 6004, a space full factor of 35% shall not be exceeded.

13.4.3

Trunking runs shall be mechanically and electrically continuous throughout their length. Brass continuity links shall be fitted to all trunking joints exterior to the trunking, utilizing brass bolts and vibration proof washers.

13.4.4

Multi-compartment trunking shall be used where segregation of services is required, and shall consist of earthed steel partitions of no less than 0.5mm thickness greater than the gauge of the trunking and be a minimum of 1.0mm thickness.

13.4.5

Compartments shall be drilled to allow conduits to pass through to the compartment served.

13.4.6

In situations where tees and junctions are encountered, the multi-compartment fittings shall be of such depth as to allow for suitable pass-over connections.

13.4.7

Where vertical runs of trunking exceed 5.0m, appropriate heat barriers shall be provided.

13.4.8

Insulated pin racks shall be provided to support cables in vertical runs exceeding 3.0m. Removable cable restraining straps shall be 'sprung' into trunking at 600mm centres where trunking covers are fixed on the underside or side of the trunking.

13.4.9

Trunking covers shall be the same length as the run, drip-proof, close fitting and of similar protective coating as the trunking. Cover joints shall not coincide with trunking joints, but be staggered, producing a more rigid construction. Covers shall only be installed on the underside of trunking in unavoidable circumstances, when approved in .writing, by the Engineer.

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13.4.10

Trunking shall be securely fixed to the building fabric at intervals not exceeding that specified in the IEE wiring regulations.

13.4.11

Trunking up to 50mm wide shall have one screw at each fixing point. Trunking over 50mm wide shall have two screws at each fixing point. Screws shall be sheradised Class 1 or stainless steel, No.12 up to 75mm width and No.14 for larger sizes.

13.4.12

Manufacturer's standard fitting shall be used. Where these are inadequate, fabricated fittings as approved by the Engineer shall be accepted. These fittings shall be finished to the same protective coating standard as manufactured trunking. Bends and tees shall have gusset or radii fittings.

13.4.13

Connections to distribution boards shall be made using flanges to allow full trunking capacity future installation of cables from spare ways.

13.4.14

Connections between trunking and apparatus shall utilize a brass male bush coupling and internally. Serrated washer or alternatively a standard flanged coupling.

13.4.15

Covers shall be removable over the whole length of the trunking. Where trunking passes through walls or floors a small length of cover must be provided on the section passing through to form a sleeve for 25mm on each side.

13.4.16

All trunking and accessories shall be from one manufacturer.

13.4.17

Separate green and yellow insulated protective conductors shall be installed within the trunking system for all circuits and services.

13.4.18

Trunking shall be installed in lieu of multiple runs of conduit and in areas which are fully accessible.

13.5

PLASTIC CABLE TRUNKING INSTALLATION

13.5.1

Trunking runs shall be as described for metal cable trunking.

13.5.2

Multi-compartment trunking shall be used where segregation of cables is required, and these shall be cut to allow conduits to pass through to the appropriate compartment.

13.5.3

In concealed conduit installations, recessed boxes shall terminate immediately behind the Compartment being served with cables, fed back entry into the trunking.

13.5.4

In situations where tees and junctions are encountered, the multi-compartment fittings shall have sufficient depth to allow for suitable pass-over connections.

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13.5.5

Vertical runs of trunking, 5.0m or more shall have suitable heat barriers. PVC trunking shall not pass through fire compartment walls or floors. Metal cable trunking of the correct classification complete with internal fire barriers shall be used in these locations. The cover of the PVC trunking shall be removable throughout.

13.5.6

For changes in direction, terminations, and tees, manufacturer's fittings shall be used. All bends and tees shall have gusset or radii fittings to suit bending radii of cables. Site fabricated fittings shall not be permitted.

13.5.7

Connections to distribution boards shall be flanged, allowing, full trunking capacity.

13.5.8

Insulated pin racks shall be provided to Support cables in vertical runs exceeding 3.0m.

13.5.9

Retaining straps shall be sprung into trunking at 600mm intervals where trunking covers are fixed to the underside or side of the trunking.

13.5.10

Methods of fixing trunking to the building fabric shall be as described for metal cable trunking except large washers shall be used at screw fixing points.

13.5.11

Covers outside buildings shall be weatherproof.

13.5.12

Methods of jointing the trunking utilizing connectors and the fixing of accessories shall be in strict accordance with the manufacturer's recommendations.

13.5.13

Fixings and connections shall give due allowance for expansion as recommended by the manufacturer or a minimum of 2mm per meter of length.

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SECTION – 14

BUILDING WIRE AND CABLE

14.1

MATERIALS

14.1.1

All cables supplied and installed shall be selected from the following types with stranded copper conductors and shall comply with the appropriate British Standard referred to below as applicable.

a.

PVC insulated wiring cables

non-

Armored 450/750V grade

BS.

6004.

BS.

6346.

BS.

5467

Cables.

BS.

5467.

e.

MICC cables.

BS.

6207.

f.

Flexible cables.

g.

Single core PVC insulated non-sheathed Cables.

BS.

6004.

Cables for wiring of luminaries.

BS.

4533.

b.

PVC insulated steel

wire

armored

PVC sheathed cables 600/1000V grade c.

XLPE insulated steel wire armored PVC sheathed multi-core cables 600/ 1000V grade.

d.

XLPE

insulated

aluminum

wire

Armored PVC sheathed single core

h.

14.1.2

No cable installation work shall be carried out in temperatures at which the cable being installed is likely to suffer damage.

14.1.3

Each drum length of cable shall be allotted a distinctive and separate reference number. This number shall appear on the test sheet covering the respective length of cable and shall also be clearly marked on the cable drum. The Contractor shall advise the Engineer upon delivery to site of each drum length, quoting this reference number, which shall also appear on the invoices. All cables shall be delivered to site with the manufacturer's seals, labels or other proof or origin intact. These labels and seals shall not be removed until the cable is required for use and shall be retained for inspection by the Engineer. The arrangement of cables and all methods of installation shall be approved by the Engineer.

14.1.4

14.1.5

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14.1.6

14.1.7

14.1.8

14.1.9

Cables shall be installed from terminal point to terminal point and straight through joints shall not be made unless approved. Where a run of MICC cable is of a length which exceeds the maximum to which the cable can be manufactured, a through joint of approved pattern will be permitted. The radius of each bend or change in direction of the route of any cable shall not be less than that laid down in the relevant table of current issues of IEE Regulations and the relevant British Standard Specifications, and shall generally not be less than eight times the overall diameter of the cable. The spacing of cable supports shall be those laid down for the relevant size and type of cable in the current issue of the IEE Regulations and the manufactures recommendations, but the horizontal longitudinal distance between wire armored support centers of unarmored cable support centers shall not exceed 1 meter, the horizontal distance between support centers of unarmored cables shall not exceed 800 mm and the distance between support centers for either type of cable on vertical runs is not to exceed 1 meter. Cables of and less than 50 mm eternal diameter shall be supported at not more than 800 mm centers. The cables may be installed in a number of different ways: (a) Laid direct in the ground (b) Laid in ducts (c) Installed in covered concrete trenches (d) Installed on cable ladders (e) Installed on perforated steel trays (f) Fixed to concrete and brickwork (g) Fixed to steelwork

14.1.10 Single core cables forming a three phase group shall be fixed in trefoil cleats of a British Insulated Calendars Cables Limited alloy pattern or similar. Flat formation may be used where specified or approved. 14.1.11 Unarmored PVC cables and wires shall be enclosed in trunking or conduit unless otherwise stated. 14.2

Cables Direct in Ground

14.2.1

Cables shall be laid in prepared trenches and the Contractor shall satisfy himself as to the suitability of the trenches. 80mm of fine riddled soil shall, unless otherwise approved, be placed at the bottom of the trench to form a bed for the cables. After the cables have been laid they shall be covered, by the Contractor, with 80mm of fine riddled soil well panned over and around the cables. If the Contractor considers the soil unsuitable for shifting he shall notify the Engineer, and if approval is obtained, well rammed selected sand may be used in lieu of finely riddled soil. All cables must then be covered by interlocking PVC cable tiles labeled in English and Arabic laid in a continuous manner, with PVC warning tape over it at an approved depth. All cables shall be supplied by the Contractor. All cables shall be laid at depth of not less than 600 mm for LV. cables and 800 for H.V. cables at all points and where this depth is not possible approved mechanical

14.2.2

14.2.3 14.2.4

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protection shall be provided. All underground cable routes shall be marked at 15 meter intervals, at changes of direction and at straight through cable joints by approved markers. 14.2.5 The contractor shall supervise and be responsible for all trenching and backfill operations irrespective of who carried out the work. 14.2.6 The contractor shall, before laying any power cable satisfy himself that the conditions on Site are such that the maximum current carrying capacity is maintained over the whole route. 14.2.7 If the Contractor considers that the conditions are such as to reduce the maximum current carrying capacity, he shall before installing the cable notify the Engineer as to what the current capacity would be under these conditions and shall not proceed with the work until the Engineer has given his permission in writing or otherwise instructed the sub-contractor to alter the cable. Before any section of the work is taken over, the sub-contractor shall confirm to the engineer, in writing, the maximum continuous current carrying capacity of the cables. 14.2.8 When the cables are laid into trenches, they shall be drawn by cable pulling grips with rotating eyes from drums supported on stands, on to the rollers throughout their length. All rollers must be removed from the trench before the covering of sifted sand is laid over the cables. All cables shall be inspected by the Engineer before backfilling. 14.2.9 Where more than one horizontal layer of cables is laid, the level of the upper layer of cable shall be gauged from the level of the finished bottom of the trench and marked on the side of the trench at frequent intervals before the installation of the lower layers, to ensure that the correct vertical spacing is maintained. 14.2.10 Final trench back filling shall not proceed until all required test for cables are performed. 14.2.11 Cable pulling machine shall have a calibrated tension meter to ensure the correct cable pulling tension as recommended by the manufacturer. 14.3

Cables Direct In Ducts

14.3.1

Where cables pass under roads or rail tracks and where shown as being in ducts in the Drawings, the cables shall be drawn into ducts. The removal of temporary plugs, rodding and cleaning of the ducts shall be the responsibility of the Contractor. Particular attention shall be given to the sealing of ducts where any of such ducts enter cable trenches within the confines of the building. Where cables are detailed to be drawn into ducts, cable pulling grips with rotating eyes shall be used and the cables shall be supported on rollers without sharp edges during drawing operation. All cable ducts shall first be cleaned and proved by drawing a mandrel of slightly less diameter than the duct immediately before pulling the cables. Any lubricant used shall have no harmful effect on the cables. Where ducts are unused, they shall be sealed before backfilling by means of wooden plugs. Where draw-in pits are inserted in the route, they will be of such size that no undue strain caused by bending is placed upon the cables. Minimum bending radii should be as specified. Cable rollers shall be used when drawing cables into a pit to ensure that no undue strain is placed upon the cables. When the cable is taken off the drum and flaked, the bending radii shall be not less than those stated for installation.

14.3.2 14.3.3

14.3.4 14.3.5

14.3.6

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14.3.7

After the cable is installed in the duct, a split wooded bus shall be drilled to suit the cable diameter and refitted and caulked with an approved asbestos compound followed by not less than 38 mm of bitumen compound soft cement.

14.4

Cables in Covered Concrete Trenches

14.4.1

The construction of cable trenches and draw-pits and the provision of cable trench and draw-pit covers shall be included. All cables shall be so arranged and fixed that any one cable may be removed without disturbance to the remainder. Multicore cables shall be installed on cable hangers, ladder or tray-work fixed to back-straps which in turn are fixed to the side of the trench. All single core phase cables shall be installed in die-cast, non-ferrous, trefoil cleats of British Insulated Calendars Cables manufacture or similar and neutral cables in similar single way cleats of the same manufacture. Flat formation may be used in specified cases when approved cleats shall be used. MICC and FP 200 type cables shall be installed on cable trays mounted and secured to back-straps fixed to the side of the trench. Such cables shall be saddled to this cable tray at intervals of not more than 500. The crossing over of cables in the same trench shall be avoided as far as possible. All unnecessary bends shall be straightened after lying. In very exception circumstances, and then only with the Engineers approval in writing, cables installed under this method shall be laid on the bottom of trenches and then in a neat and orderly manner. The laying of cables will require the removal of trench covers from time to time, and the contractor shall include in his price for the removal and immediate replacement of covers after laying each cable. The trenches shall not any time therefore be left open to be fouled and trench covers damaged. Whilst trenches are open the Contractor shall be responsible to ensure that covers are undamaged and trenches are clean before recovering; any damage to covers shall be made good by the Contractor at his own expense.

14.4.2 14.4.3 14.4.4

14.4.5

14.4.6 14.4.7

14.4.8

14.5

Cables On Cable Ladders

14.5.1

Where so indicated on the layout drawings a cable ladder system may be run. The ladders shall be of adequate width for disposing the cables with a width allowance of 25% for additional cables. Care shall be taken to ensure that the ladders do no foul overhead cranes, doors or other features. The ladder shall be of such strength that, when loaded with all the cables for which it is designed, plus an additional 15kg/m, it shall not deflect from the horizontal by more than 3 mm. The contractor shall supply. All medium duty mild steel ladders to BS 1449 part 1 1983, fixing bolts etc., for supporting the cable, including marking out and checking. Cables shall be supported on steel cable ladders using approved cleats. All single core phase cables are to be installed in die-cast, non-ferrous, trefoil cleats of British Insulated Calendars Cables manufacture or similar and neutral cable in similar single way cleats of the same manufacture unless flat formation is used when approved single cleats may be used.

14.5.2

14.5.3 14.5.4

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14.5.5

14.5.6

14.5.7

14.5.8

14.6

For cables of core area of and less than 25mm2 c.s.a. multi-cleats, on a common bolt or spindle, of British Insulated Calendars Cables manufacture, or approved or equivalent will be acceptable. Multiple cables shall be secured with PC cleats at spacing consistent with the size of cables used. Every care shall be taken in cabling handling during erection to avoid the slightest damage to cables. When cables are clamped in the ladders, the contractor shall ensure that undue stress is not placed on any shading or armoring. All supports and ladders shall be arranged as far as practicable for the easy removal of any single cable in a multi-cable run, without disturbing other cables and without threading cables through supports or racks. Cutting away, fixing and grouting of rawlbolts or approved rawlbolts type fixings and making good shall be done by the Contractor. Cables shall be run in a neat and orderly manner. The Contractor shall be responsible for the design and detailing of the steelwork for cable ladder and shall submit such design for approval before putting the work in hand. The contractor shall include the cost of this design work in his price for this method of installation.

Cables on Trays

14.6.1

Trays shall be adequately supported to prevent sagging by more than 3mm between fixed points; all supporting steelwork shall be fixed at not more than 1m centers unless otherwise specified or approved. 14.6.2 All cables shall be saddled to tray-work. MICC cabling shall be saddled at not more than 500 mm centers and all other cabling at not more than 1m centers. 14.6.3 All cables, other than pilot or control, when installed on trays shall not be more than one layer. 14.6.4 The saddling of MICC or FP 200 type cable to tray-work shall be by 12mm PVC coated copper strip unless otherwise specified or approved. 14.6.5 All cable tray shall be of the heavy duty hot dipped galvanized (with thickness not less than 1 mm width of the tray) to BS 2989 1982, return flange type unless approved otherwise for specific locations only. 14.6.6 The contractor shall submit detailed drawings for cable tray (H.T. & L.T.) and cable tray suspension system to DEWA for their approval. 14.6.7 Cable tray mounted externally on roofs etc. shall be provided with heavy duty sunshields made of galvanized steel or aluminum. The sunshields shall be arranged to allow adequate ventilation of the cables or the tray. 14.6.8 All external fixings and brackets shall be galvanized steel, galvanized after fabrication. 14.6.9 All internal fixings shall be either proprietary galvanized channel or a galvanized fabricated channel or angle steel to the Engineer's approval. 14.6.10 Cables Fixed to Concrete and Block work 14.6.11 Where cables, other than MICC are run individually, they shall be supported by approved cleats fixed directly to the concrete or brick work. These cleats shall be spaced so as to avoid sagging of cables and in no case at more than 1m between centers. 14.6.12 When more than one row of cables follows a single route, cables cleats shall be fixed to approve back-straps.

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14.6.13 MICC cables run individually shall be saddled with spacer bars at intervals of not more than 500 mm. Where five or more cables are required to be supported, the fixing saddles and spacer bars shall be fabricated from 12mm copper strips. 14.6.14 Except where otherwise stated cables within buildings shall be supported on purpose made cable hangers. Where single runs or cables are to be installed along walls, the hangers shall be of the 'J' bracket type manufactured form mild steel and mounted on mild steel back-straps, which shall be fixed to the wall by means of a ragbolts. 14.6.15 Where multiple runs of cables are to be installed along walls, or in ducts, the hangers shall be of the 'claw' type mounted on slotted channel the full height of the ducts. 14.6.16 All cleats, clamps and hangers shall have rounded edges and a single lapping of bitumastic felt inserted between the cable armoring and the metalwork of any hanger or bracket. Spacing of fixing shall be in accordance with the relevant IEE regulations and, where a number of cables are run together, the spacing of the fixings shall be that required by the smallest cable in the run. 14.6.17 Bends in cables shall not exceed the limits as laid out in the IEE regulations. 14.6.18 Cables installed in open positions shall be cased to a height of 2 meters above platform or floor. Sheet steel of not less than 2mm thickness shall be used for this purpose. 14.7

Cables Fixed to Steelwork

14.7.1

14.7.2

Structural steelwork shall not be drilled for cable fixing. Individual cables other than MICC cables run on steelwork shall be supported in approved cleats fixed to approve backstraps clamped to the structural steelwork. These cleats shall be spaced so as to avoid sagging of cables and in no case at more than 1m between centers. MICC and FP 200 type cable run individually shall be saddled at intervals of not more than 500mm and spacer bar saddles shall be used, mounted on back-straps clipped or welded to the steelwork. Where five or more cables are required to be supported, the fixing saddles and spacer bars shall be fabricated from 12mm copper strip.

14.8

Cable Termination

14.8.1

All jointing materials to be used shall conform to the relevant requirements of British Standards and the Contractor shall state the quality of the compounds he proposes to use, which shall be entirely suitable for the site conditions. The contractor shall be responsible for 'ringing through' and testing all cables before finally making off end and connecting up. The correct phase rotation of motors etc., shall be the responsibility of the Contractor. Phase rotation tests shall be carried out by the Contractor and, if found necessary, the Contractor shall carry out any reversal of phase connections. This work shall be included in the works. During the maintenance period, the contractor shall be responsible for maintaining the filling medium at correct level in all terminal boxes or other apparatus to be filled by him, and shall inform the Engineer when action has been necessary. All cables shall be colour coded in accordance with the IEE Regulations current edition and amendments.

14.8.2

14.8.3

14.8.4

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14.8.5

All sealing and jointing work shall be in accordance with the best current practice and of first class workmanship. 14.8.6 Where cable sheaths are used as earth continuity conductors, glands shall have the necessary contact surfaces or straps to provide a low resistance path under fault conditions. 14.8.7 All cables connections to plant shall be made with approved cable lugs, compression type lugs being used, together with tools supplied by the lug manufacture. 14.8.8 All cable ends shall be marked to identify the cable connection. Identification labels for all cables shall give the cable an approved reference number. 14.8.9 All cables shall have a label fixed to them below each cable joints, also where the cable passes through ducts and trenches at each exit from or entry to such ducts and trenches and where the cable enters a room or building. The label shall indicate the cable potential and destination as well as the cable number. 14.8.10 Home runs exceeding 25m in length to distribution boards shall be minimum 4mm2 unless otherwise stated. 14.8.11 Color code conductors as follows: • 3 phase red, yellow, blue •

1 phase

-

red

•

Control wiring

-

orange or red with cable markers to match the diagrams at each point of connection and termination.

•

Neutrals

-

black

•

Earth

-

green/yellow striped

14.8.12 Conductors shall have the color impregnated into the insulation at the time of manufacture. 14.8.13 Painting of conductor insulation will not be accepted. 14.9

MANUFACTURER Cables shall be manufactured by one of the following: •

Ducab- BICC .

•

DELTA

•

Pirelli

•

Riyadh Cables

•

Oman Cables

Flame resistant cables shall be manufactured by one of the following: •

Firecel SR114

•

Firetuf PVC

•

Flamsil

•

Pirelli FP200 gold

•

Fire safe

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14.10

INSTALLATION

14.10.1

Wiring of multi-point circuits shall utilize a 'looping-in' system. Joints and connections other than those required for the connection of switches, fuses, socket outlets, motors and the like shall not be allowed.

14.10.2

PVC cables shall not be in direct contact with any form of polystyrene used in the building. PVC cables shall not be installed when manufacturers recommended installation temperature. If cable has been exposed to a temperature below recommended value a warming up cable is installed. PVC cables shall not enter any Luminaire or heat-producing equipment. For tungsten luminaries, heat-resisting cables shall be installed from the luminaries to the lighting switches or equivalent. For fluorescent luminaries high temperature PVC cables shall be installed from the lighting switch or equivalent. For recessed tungsten and fluorescent luminaries and heat-producing/emitting equipment, final connections shall be made using heat-resistant flexible cables. Where cables are permitted to traverse channel-ways or similar on continuously mounted fluorescent luminaries, heat-resistant cables shall be used throughout. Soldered connections or lugs shall not be permitted. Conductors requiring bolted connection shall be terminated with compression lugs using an automatic compression crimp tool which will only release after the correct crimp depth has been obtained. All crimped connections shall be contained within an appropriately sized conduit box. Bolted connections shall have spring washers. Pinch screw terminals may not be used for conductors greater than 6.0mm. Single strand cables shall be doubled back on themselves when terminations are made. PVC cables shall not be used for final connections to any appliances containing a heating element or any appliance emitting heat. Where flexible conduit is used as a final connection wiring medium, heat-resistant cables shall be used and these shall commence at the solid conduit end of the flexible conduit provided it is not in a heated area. If this is not possible, heat-resistant cables shall be run back to the first switch outside the hot area. PVC cables shall not exceed the carrying capacity of the conduit or trunking. The installations shall comply strictly with the IEE Wiring Regulations regarding capacity of conduits and trunking for 450/750V cables, and a space fill factor of 35% shall not be exceeded for trunking. Circuit protective conductors shall be used throughout the installation and shall be the same grade and temperature rating of the live conductors of the circuit. Metal conduit and/or the trunking system enclosure shall not be used exclusively as a circuit protective medium. Separate circuit protective conductors shall be installed and shall be colored green and yellow.

14.10.3

14.10.4

14.10.5

14.10.6 14.10.7

14.10.8

14.10.9 14.10.10

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14.10.11 14.10.12 14.10.13 14.10.14 14.10.15 14.10.16

14.10.17 14.10.18 14.10.19 14.10.20

The cross-sectional area of circuit protective conductors shall be in strict accordance with the requirement of the IEE Wiring Regulations. Conductors shall be pulled into conduit in a careful and workmanlike manner without overstressing or exceeding the pulling limitations of the conductors. Conductors shall be ‘combed’ as pulling proceeds. The neutral and circuit protective conductor or each circuit shall be pulled with the phase conductors. Conductors of a circuit run in trunking shall be ‘grouped’ together with approved plastic binding clips. Tape shall not be used. Clip cables neatly to tray with cable separation and support spacing as recommended by the manufacturer. Where more than two power cables are run together, provide a cable tray. Secure cables with cleats, saddles or ties as appropriate to location and use spacers where more than one layer is required. Install cables in accordance with the manufacturer’s instructions, using manufacturer’s approved terminating devices. Terminate single conductor cables entering steel cabinets through a non-ferrous plate. Where cables pass through a floor or fire barrier provide cable transit or equivalent fire stop with openings properly sized for the cables. Run surface cables similar to exposed conduit installations. Run cables concealed above ceilings in finished areas. Where exposed, run parallel to building lines and avoid proximity to water.

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SECTION – 15

JUNCTION BOXES, PULL BOXES AND OUTLET BOXES

15.1

MATERIALS

15.1.1

Junction and pull boxes shall be sized to accommodate the conduits indicated and to facilitate pulling conductors required. Minimum depth shall be 50mm.

15.1.2

Junction and pull boxes shall be steel with covers attached by screws.

15.1.3

Junction boxes for signaling, communications, alarms and control wiring shall be provided with terminal strips. Terminal strips shall have screw type terminals and cable identification strip.

15.1.4

15.1.11

Outlet boxes shall be manufactured of galvanized sheet steel, for surface run conduit and UPVC where conduits are buried in concrete slabs. Use metal clad weatherproof boxes outdoors or in damp locations. Use metal clad boxes where surface mounted in unfinished areas. Ceiling boxes shall be 75mm circular or square, and 50mm deep complete with fittings where required to support fixtures. Outlet boxes in walls ceilings or floors shall be of an approved type suitable for the application. Provide gang boxes at locations where more than one device is to be mounted. Provide combination boxes with barriers for wiring of more than one voltage source. Provide panel mounted fixing frames where outlet boxes are installed in paneling.

15.2

MANUFACTURERS

15.1.5 15.1.6 15.1.7 15.1.8 15.1.9 15.1.10

Junction and pull boxes shall be manufactured by one of the following: MEM MK Crabtree Legrand Volex Barton

15.3

INSTALLATION

15.3.1

Junction and pull boxes to be accessible at all times. Boxes may be installed in mechanical, electrical, storage or janitor rooms or in hung ceiling space.

15.3.2

Provide access hatches for boxes installed in ceiling spaces unless ceiling tiles are

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of lay-in or snap-in type. 15.3.3

Locate junction and pull boxes so piping, ductwork or equipment will not restrict or block access. If such obstruction are installed after junction or pull box is installed, the obstruction shall be removed or junction or pull box relocated with no adjustment to the contract price.

15.3.4

Cables connected to terminals shall be identified by cable markers and at the terminal strip.

15.3.5

Terminal strips may be omitted where there are less than 5 connections in a junction box. All conductors shall be identified by wire markers.

15.3.6

Terminals and cable identification may be omitted for through cables which are not broken at a junction box.

15.3.7

Provide pull boxes in conduit runs where required to facilitate the pulling of cable.

15.3.8

Provide outlet boxes for all lighting fixtures, receptacles or other devices in walls ceilings, or floors. Wire each fixture from an outlet box, with a maximum of four fixtures per box.

15.3.9

Support boxes independently of the conduit system and mechanical ducts.

15.3.10

Locate boxes in hung ceilings Spaces so as not interfere with the removal of ceiling tiles or equipment.

15.3.11

Openings for outlet boxes installed flush in concrete block shall be cut by the Masonry Division. Ensure that openings are cut to fit boxes so that edges of openings are not visible after installation of cover plates. The use of mortar to patch oversize or ragged openings not be permitted.

15.3.12

Do not mount boxes between pairs of studs, on opposite sides of sound-rated partitions. Seal spaces between boxes and gypsum board with acoustical sealant.

15.3.13

Adjust floor boxes so that closure plates are flush with the surface of the floor tile, or the floor if carpeting is specified. Provide under floor duct fittings and outlets or single flush outlets with waterproof covers, as indicated on the drawings.

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SECTION – 16

16.1

WIRING DEVICES

GENERAL

Wiring devices for finished areas shall be flush mounted as follows: Apartments shall be white plastic as manufactured by MK "Accent" range or equal. Note: All accessories shall be screw less fix. Wiring devices in all unfinished areas such as pump rooms electrical rooms and the like shall be surface mounted metal clad. 16.2

SWITCHES Light switches shall be of manufacture, rating and type as specified. Light switches shall-comply to BS3676 and shall be grid type. Switches shall be installed in boxes with adjustable lugs to ensure front plate is true and square. Flush boxes shall be flush with the finished wall surface and overlapping front plates shall be used. Boxes shall be suitable for the wiring system used. Switches shall be 15/20 ampere rated. Where switches are mounted in Class 4 installations where exposed to weather or continual dampness they shall be water-tight pattern with approved gaskets. Enclosure shall comply with BS 5420 1977 with ingress protection to IP 54. Ceiling type switches shall be to BS 3676 insulated pattern finished white (unless otherwise specified) with single cord operation. Switches shall be suitable for back and side wiring with 4.0mm2 or 2 x 2.5mm2 standard conductors.

16.3

13AM. SOCKETS OUTLETS Socket outlets shall comply to BS 1363, switched, shuttered and mounted in ring or multiple assemblies and shall be of the type and rating as specified/indicated on the drawings. Matching plugs shall be provided for each socket outlet installed. Half of the plugs shall house 13A fuses and half 3A fuses. Plugs tops shall be fitted with the correct rated fuse for the appliance to which it is connected. Socket outlets shall be complete with boxes not less than 35mm deep and the box shall have a suitably mounted, brass, protective conductor terminal. Socket outlets installed in flush installations shall have overlapping front plates.

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In surface installations front plates shall be flush with the sides of the box and shall be metal clad unless otherwise specified. Where socket outlets are installed on perimeter paneling, provide suitable metal frames for panel mounting. The earth pin of the socket shall be connected to the box earth terminal with a green and yellow PVC-insulated protective conductor. Cover screws are not acceptable for earth continuity. Indicating pattern socket outlets shall be used for appliances containing a heating element and the like. In Class 4 protection areas, where socket outlets are installed in exterior or damp locations, outlets shall be watertight pattern with watertight caps and approved gaskets. Suitable plugs shall be provided for each outlet. Enclosure shall comply to BS 5420 1977 and ingress protection to IP 44. Socket outlet shall be suitable for back and side wiring with 1 x 6.0mm2 or 2 x 4.0mm2 standard conductors. 240/110V socket outlets shall comprise of double wound transformer with mid point of secondary winding earthed. The socket outlet shall be 16A rated, 3 pin for portable tools and hand lamps. 16.4

FUSED CONNECTION UNITS Fused connection units shall be to BS5733, double-pole, insulated pattern, switched with neon Indicator as specified, with brushed satin, stainless steel face plates or face plates to match socket outlets. Where used as a flexible outlet to an appliance, fused connection units shall be of the flexible outlet pattern with cable anchoring clamp. Fuses shall be provided with each connection unit.

16.5

COVER PLATES Socket outlets and switch cover plate finishes to be as detailed in 2.1.1. Socket outlets and switch cover plate in unfinished areas and above ceilings shall be metal clad. Samples of all cover plates shall be provided to the Engineer for approval prior to ordering.

16.6

INDUSTRIAL SOCKETS 20 AMPERE AND 30 AMPERE RATING Industrial sockets shall comply to BS 4343 and shall be switched. Industrial sockets located internally shall have minimum ingress protection of IP44 and IP65 for external sockets.

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All single phase sockets shall be 220-250 volts and all three phase sockets shall be 380-415 volts. Sockets and plugs shall have polycarbonate housing. Sockets shall be complete with surface back base and shall be angled at approximately 45°. Sockets shall be complete with plugs. 16.7

MANUFACTURER Wiring devices shall be manufactured by one of the following: - MK - UK - Crabtree - UK - Legrand – France

16.8

INSTALLATION Install single throw switches with lever in "UP" position when switch is closed. Install switches in gang type outlet boxes with ganged cover plate when more than one switch or device is shown. Cover plates shall be installed after all painting has been completed. Provide phase barriers where more than one phase enters lighting switch. Samples of all accessories shall be provided for approval by the Engineer prior to ordering.

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SECTION – 17

LIGHT FIXTURES

A-INTERIOR LIGHT FITTINGS 17.1 MATERIALS Lighting fixtures shall be as listed in the lighting fixture schedule and as detailed in this specification. Before placing orders for any recessed lighting fixtures check the room finish schedule, to ensure that fixtures are coordinated with the ceiling and compatible with the ceiling support grid. Fixtures shall be delivered completely assembled and in their original cartons. No fixtures shall be delivered to or stored within the building or on the site until dry and protected space is available. Steel fixture bodies and components shall be painted after all forming, cutting and fabrication are complete. Pre-painted steel will not be accepted. Emergency 1ighting should be supplied via static inverters. Luminaries shall be complete with integral high power factor correction control gear to give a power factor between 0.9 and unit 1. Ensure correct control gear is provided where light fixture are to be dimmed. Fluorescent Lamps to be tri phosphor color temp 3500 K. All control gear shall be high frequency.

17.2 LUMINAIRE SCHEDULE Refer to Drawings

17.3 MANUFACTURERS All light fixtures to be complete with lamps manufactured by one of the following. - GE - Philips - Osram 17.4 INSTALLATION Install rows of lighting fixtures accurately, in line and level. Any fixtures which in the opinion of the Engineer are not installed properly in the opinion of the Engineer, shall be taken down and reinstalled to the satisfaction of the Engineer at no change to the contract sum.

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Install surface mounted fixtures light to the ceiling without showing a space or light leak between the frame and the ceiling, except where fixtures have an upward indirect light component. Support suspended fixtures of mild steel threaded rod as recommended by the manufacturer with a minimum number of two supports per fixture. Where fixtures are chain hung, the chain shall be No. 10T single jack chain, galvanized with 20kg working load limit. Run heat resistant cable down chains to fixtures and attach to chains with cable clips. Attach fixtures, boxes or supports to concrete slabs with minimum 6mm dia. Bolts and metal expansion anchors. Submit samples of anchors to Engineer for approval before installation. Locate fixture hangers on the tile centers or intersections. Mount recessed incandescent, troffers and surface-mounted fixtures in or on full tiles. Do not mount fixtures pipes, ducts or ceiling mounted equipment. In the event o unavoidably tight locations, provide hangers to clear the obstructions. Check layouts of other trades on the job and plan cooperatively. Hang fixtures in any room at one height unless indicated otherwise. Support fixtures independently of mechanical ducts. Support all lighting fixtures independently of suspended ceiling. Obtain the Engineer’s approval before making any changes to fixtures layouts. Install louvers / diffusers after other construction work has been completed and are is made ready for occupancy. Handle louvers with clean gloves, never with bare hands. Replace or clean any louvers, which are finger printed or otherwise marked to the Engineer’s satisfaction. ceiling tile is accessible shall be via a plug-in ceiling rose wired in heat resistant double insulated cable. Ceiling rose to be mounted within 1000mm of fight fixture. Connections to luminaries where the ceiling is not accessible such as dry wall and the like shall be via OHLS flexible conduit with no terminations above the ceiling. Fluorescent fixtures shall be aligned parallel to the longitudinal axis of the area they serve.

B-EXTERIOR LIGHT FITTINGS 17.5 MATERIALS Wiring shall be in accordance with the appropriate section of this specification. Floodlighting fixtures shall be as detailed in the lighting fixture schedule.

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SECTION – 18 18.1

GROUNDING AND BONDING

MATERIALS

The Earthing system shall include, without being limited to, the following: •

Frames of main supply transformers, neutral grounding of transformers.

•

Main 240/415V low voltage switchboards and distribution boards.

•

Frames of all motors 40 hp and larger with separate ground wire to nearest MCC ground bus.

•

Motor control centres, starters and control panels.

•

Building steel.

•

Emergency generators, elevators and escalators.

•

Air-conditioning systems.

•

Water pipes including sprinkler pipes.

•

Exposed Metallic Parts of the Building.

Earth rods shall be copper plated steel 20mm dia. x 3600mm long. Provide earth rods as indicated on drawings and as required by DEWA. All equipment earth conductors outside the electrical rooms or closets, except bare conductors which are part of a cable assembly, shall have the insulation colored green/yellow and shall be installed in the same conduit as the circuit wiring. Earth conductors shall be copper, not smaller than No. 10mm2, except as indicated. Earth bar shall be 6mm x 50mm by length as indicated on drawings. Connections to earth rods shall be made by proprietary purpose made clamps of the same manufacture and provided with a concrete inspection pit with removable cover inscribed "Earth".

18.2

MANUFACTURER The Earthing equipment is to be supplied by one of the following suppliers:

•

Furse

•

Wallis

•

Helita

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18.3

INSTALLATION The whole of the earthing and bonding shall be installed and tested in accordance with the requirements of the IEE Wiring Regulations, DEWA requirement and this specification. Provide interconnected earth ring for the sub-station. The main earth ring shall be as shown on drawings. Consumer electrical equipment earth bonding shall be 120mm2. Attention is drawn to the use of circuit protective conductors in addition to metallic conduit/trunking. All enclosures, equipment, exposed conductive parts, extraneous conductive parts, and metallic trunking, metallic conduits, metallic cable trays and other metalwork other than any live part, forming protection to or part of the electrical installation, Including apparatus and appliances, shall be effectively bonded to earth. Protective conductors shall be provided in the form of copper tape to all vertical electrical rising busbars. The size of this tape shall be in accordance with the IEE Wiring Regulations. All bonding and protective conductors, where fixed to bolted connections, shall be terminated on compression type lugs made with an automatic purpose-made machine. Provide a earth bar 450mm long on 10mm spacers on the wall of each electrical room, and connect to the enclosure and ground buses of all equipment in the room. Run a No. 120mm2 sheathed copper cables from the main 600V switchboard ground bus to the main water pipe and connect to the upstream side of the water meter. Bond water main with proprietary purpose made bonding clamps. Scrape and sand the water main to remove all rust, paint or scale at the location where the connection is to be made. Remove non-conductive coatings from threads or other contact surfaces to ensure good electrical continuity. Provide a separate insulated ground conductor in every conduit, in every system, to all, devices and fixtures. Protect all exposed grounding conductors from mechanical damage. Soldered joints are not permitted.

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18.4

Testing and commissioning

i)

The complete installation shall be tested and inspected to ensure that it complies with the requirements of this Specification, the IEE Wiring Regulations, British Standards and DEWA. The tests shall be carried out in accordance with the IEE Wiring Regulations and to the satisfaction of the DEWA. The inspection and tests shall be carried out in the same sequence as set out in the IEE Wiring Regula1ions and DEWA requirements and in such time as to allow any remedial work to be completed prior to Practical Completion. Tests shall also Include any part of the existing installation related to the new work. Tests shall be carried out strictly in accordance with a programme to be agreed prior to commencement of such tests. Facilities shall be provided for witnessing of such tests. All instruments necessary for inspection and testing shall be supplied and shall be properly calibrated and operated by personnel skilled in their use. Allowance shall be made for disconnection or similar operations to satisfy the requirements for testing, etc., and the reinstatement of the installation.

ii)

iii)

iv) v)

18.5

CERTIFICATES AND SCHEDULES All values called for under the IEE Wiring Regulations shall be recorded and three copies of the Inspection Certificate described in the IEE Wiring Regulations shall be submitted. The installation shall not be considered as completed unless inspection Certificates have been submitted.

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SECTION – 19

EMERGENCY LIGHTING SYSTEM

19.1

GENERAL STANDARDS

19.1.1

The Emergency Lighting System and all of its components shall be manufactured by an ISO 9001 / 9002 certified company to meet the requirements of BS 5266, EN 50171, EN 50172 and the local Civil Defence. The Emergency Lighting shall achieve the following requirements:

19.1.2 • • • • •

19.2

Clearly and unambiguously indicate all egress routes from the building. Illuminate all escape routes / public open areas / staircases to an illumination level of 5 Lux as a minimum average. Provide illumination to Fire Alarm Call Points, Fire Extinguishers, Hose Reels and other safety equipment as indicated by the engineer. Provide illumination to First Aid points Provide a minimum of 10c/0 of the normal lighting level during mains failure in hazardous areas as indicated by the engineer.

SELF CONTAINED NON MAINTAINED EMERGENCY LIGHTING SYSTEM

19.2.1 The system shall comprise of self contained non-maintained luminaires and maintained exit signs as indicated on the layout drawings. 19.2.2 In the event of a power failure the luminaires shall illuminate for a period of three hours minimum by means of their integral NI-CAD batteries. Under normal operating conditions a red led shall be visible within the luminaire to indicate that it is fully charged and ready for operation. 19.2.3 The luminaires shall be supplied with 300mm 8W fluorescent tubes with an emergency lamp output of 100 lumens each.

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SECTION – 20

PACKAGED ENGINE GENERATOR

Not Applicable

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SECTION – 21

ANALOGUE ADDRESSABLE FIRE ALARM SYSTEM

21.1 SYSTEM DESCRIPTION 21.1.1

All equipment proposed for use shall be UL/ EN54 approved with third party certification. The equipment standards shall not be mixed.

21.1.2

This section of the specifications includes the furnishing, installation, and connection of the microprocessor controlled, intelligent reporting fire alarm equipment required to form a complete co-ordinated system ready for operation. It shall include, but not be limited to, alarm initiating devices, alarm notification appliances, Control and Indicating Equipment(C.I.E.), auxiliary control devices, repeaters, power supplies, and wiring as shown on the drawings and specified herein.

21.1.3

The fire alarm system installations shall, where applicable, comply with requirements of: •

BS 5839

Fire detection and alarm systems for buildings.

•

Pt.1:1988

Code of practice for system design, installation and servicing.

•

Pt.2:1983

Specification for manual call points.

•

Pt.4:1988

Specification for control and indicating equipment.

•

Pt.51988

Specification for optical beam smoke detectors.

•

BS 5445

Components of automatic fire detection systems.

•

Pt.1:1977

Introduction.

•

Pt.5:1977

Heat sensitive detectors - point detectors containing a static element.

•

Pt.7:1984

Specification for point type smoke detectors using scattered light, Transmitted light or Ionisation.

• 21.1.4

Pt.8:1984

Specification for high temperature heat detectors.

Basic Performance a. Alarm and fault signals from all intelligent reporting devices shall be encoded onto a loop signalling line circuit. b. Initiation device circuits shall be wired as a closed loop in accordance with BS 5839. c. Indicating appliance circuits shall be wired as radials with end of line devices to provide monitoring to BS 5839. d. Digitised electronic signals shall employ check digits or multiple polling. e. A single short or open circuit on any system signalling line circuit, initiating device circuit, or indicating appliance circuit shall not cause


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system malfunction, loss of operating power or the ability to report alarm in unaffected areas. f. Alarm signals arriving at the main C.I.E. shall not be lost following a power failure until the alarm signal is processed and recorded. 21.1.5

an

Basic System Functional Operation: When a fire alarm condition is detected and reported by one of the system initiating devices or appliances, the following functions shall immediately occur: a. b.

The Common Alarm LED shall illuminate. A local piezo-electric signal in the C.I.E. shall sound.

c.

The back-lit LCD shall indicate all information associated with the Fire Alarm condition, including the type of alarm point, zone and its location within the protected premises.

d.

Printing and history storage equipment shall log the information associated with each new C.I.E. condition, along with time and date of occurrence. e. All system output programs assigned via control-by-event to be activated by the particular point in alarm shall be executed, and the associated System Outputs (alarm indicating appliances and/or relays) shall be activated. 21.1.6

The evacuation alarm shall sound continuously until silenced at the main panel. Subsequent alarms shall cause the evacuation alarm to begin again.

21.1.7

Alarm silencing shall be provided at the main fire alarm panel only.

21.1.8

Transmit signal to BMS.

21.1.9

Transmit signal to security system.

21.2

SCOPE OF WORKS The scope of work shall cover the supply, design, manufacture, testing in the factory, packing, insurance, delivery to site, unloading, installation, testing and commissioning of all components with all necessary accessories in accordance with this technical specification.

21.3 MANUFACTURERS The fire alarm system shall be manufactured by one of the following: •

Cerberus

•

Gent

•

Edwards

•

Simplex

•

Esser


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21.4

EQUIPMENT & MATERIAL, GENERAL

21.4.1

All equipment and components shall be new, and the manufacturer's current model. The authorised representative of the manufacturer for the major equipment, such as the C.I.E., shall be responsible for the satisfactory installation of the complete system.

21.4.2

All equipment and components shall be installed in strict compliance with manufacturer's recommendations. Consult the manufacturer's installation manuals for all wiring diagrams, schematics, physical equipment sizes, etc., before beginning the system installation. Refer to the connection diagram for all specific system installation /termination/wiring data.

21.4.3

All Equipment shall be attached to walls and ceiling/floor assemblies and shall be held firmly in place (e.g., detectors shall not be supported solely by suspended ceilings). Fasteners and supports shall be adequate to support the required load.

21.5

CABLING

21.5.1

All wiring shall be fire retardant cable with red outer sheath approved by Civil Defense and the Engineer concealed within all finished areas. Cable size shall match it's use and calculations recorded and submitted for review. All circuits shall be a minimum of 14 SWG. All cables shall be high Voltage insulation tested in accordance with current IEE regulations and the results recorded and test certificates issued to the commissioning engineer. All signalling line circuits shall be resistance, end to end, checked and the results recorded and test certificates issued to the commissioning engineer. All cables shall be installed in accordance with the latest IEE regulations All cables shall be installed in accordance with BS 5839 Pt.1

21.5.2 21.5.3 21.5.4 21.5.5 21.5.6

21.6 CONTROL PANELS The Control Panels (CP's) shall be the central processing unit of the system, receiving and analyzing signals from fire sensors, providing audible and visual information to the user, initiating automatic alarm response sequences and providing the means by which the user interacts with the system. Each control panel shall be complete with a network card and with peer-to-peer communication. All CP's shall have the following minimum standard requirements. 80 character Backlit liquid crystal display. UL listed/ EN 54 The Nos. of loops shown in the drawings are indicative only. Referring to the manufacturer for the exact Nos. of loops required. However the 10% spare capacity in each loop to be provided. Power supply and charger with controller


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Ground fault indication from front panel. Battery supervision. Operator feature (refer to description below) Strip / desktop printer. Menu drivers use interface 21.6.1

21.6.2 21.6.3 21.6.4

21.6.5

Software features : Standardized Software Fully field programmable and editable The system shall be programmable, configurable and expandable in the field without the need for special tools or electronic equipment and shall not require field replacement of electronic Integrated circuits. All field defined programs shall be stored in non-volatile memory. Battery , backup for configuration is not acceptable. The programming functions shall be enabled with a 4-digit password that may be defined specifically for the system when it is installed. Two levels of password protection shall be provided in addition to a key-Iock door. One level shall be used for changes such as set time or set date. A second (higher-level) password protection shall be used for actual change of program functions. Non volatile memory: system operating instructions shall not be corrupted by 00 loss of primary or secondary power. Re-programming shall be possible on site without the use of "off-board" programmed, modems or special tools. 4-operator access level. Minimum 1000 event historical log.

21.6.6

Operator Features Located on the front of the CP's shall be the operator's panel. The operator panel shall have the following functions

21.6.7 21.6.8

21.6.9

Control keys Function keys Acknowledge keys. Display action keys Entry key 80 character alphanumeric liquid crystal display Alarm supervisory and trouble LED indication The control keys shall be programmable; they will be used for manual operation, A/C shut down and the like. Control keys shall be password protected. The 'Function Keys' Display Action Keypad and the Entry Keypad shall be user friendly. Operations shall include Enabling and disabling circuits, turn control points “On” or “Off”, set time and date. Display historical logs etc. The acknowledge key pad shall have the following functions: Alarm Acknowledge Supervisory Acknowledge Trouble Acknowledge Alarm Silence System Reset


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21.6.10 the following shall be the minimum for specific systems operations: i)

Smoke sensor sensitivity adjust means shall be provided for adjusting the sensitivity of any or all analogue intelligent smoke sensors in the system from the system keypad. Sensitivity range shall be restricted within the allowed UL/EN54 limits and requirements.

ii)

Alarm Verification: Each of the intelligent addressable smoke sensors in the system may be independently selected and enabled as an alarm verified detectors. The alarm verification Function shall be programmable and each sensor shall be capable of selection for verification during field programming of the system. The alarm verification shall not require any additional hardware in the fire panels.

iii)

Isolation: Any device, zone or devices, or loop of devices in the system may be enabled or isolated through the system keypad.

iv)

Test: It will be possible to perform a one person test by device, zone of devices or loop of devices.

v)

System Status Reports: Upon command from an operator, a status report will be generated showing information such as system software versions, number of loops fitted and number of relays or indicating circuits fitted.

vi)

System History Recording and Reporting: The fire control panel shall contain a history/buffer that will be capable of storing up to 1000 system output/input/control events. Each of these events will be stored and time and f" date stamped with the actual time of the activation. The contents of the history c buffer may be manually reviewed, several events at a time, either on the LCD or the printer.

vii)

Automatic Sensor Maintenance Alert: A fire shall automatically initiate interrogation of each intelligent system sensor and shall analyze the sensor responses over a period of time.

viii)

If any intelligent sensor in the system responds with a reading that is below or above normal limits, the system will enter the fault mode, and the particular, intelligent sensor will be annunciated on the system display, and printed on the optional system printer. This feature shall in no way inhibit the receipt of any other input signal.

ix)

To ensure continuous stability of the system, the setting of the address code in each addressable device shall be by hardware means, (e.g. a D1L switch) or electronic addressing system.

x)

The Control Panel shall be capable of receiving analogue and digital inputs operating with any of the following types of automatic detection equipment.

Conventional detector Addressable two-state detectors. Analogue addressable detectors. 21.6.11 Provision shall be made for each addressable loop to be sub-divided into a maximum of 8 geographical zones. The section of wiring corresponding to each


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zone circuit shall be protected from faults in other sections by line isolator modules. 21.6.10 In order to facilitate re-configuration and system extension, the allocation of addresses to devices shall be independent of their physical arrangement on the loops. Each device shall have an alphanumeric tag number, given on a floor by floor basis. 21.6.11 the Control Panel shall have provision to drive and monitor up to 31 repeater panels providing a repeat of the indications on the CP display and- up to a further 3 repeater panels also incorporating the full set of system manual controls. 21.6.12 The Control Panel shall have provision for the connection, either locally via a parallel port or remotely via a serial port, of an 80-character line printer. The printer shall provide the alarm summary with date and time of occurrence of the alarms. 21.6.13 The housings shall be capable of being surface or semi-recessed wall mounting and shall come complete -with cable entries, fixings, knock-outs and covers. Housing shall also have a extruded alloy deep downs key lockable door and shall be modular in structure for ease of installation, maintenance and expansion. 21.6.14 The display component of the Control Panel shall be mounted to the cabinet chassis assembly and protected with the cabinet front door. 21.6.15 The housings. shall afford a minimum ingress protection to IP43. 21.6.16 It shall not be possible to open the CP's without the use of a special tool. 21.6.17 The CP's shall be of a neutral light grey or beige color. 21.6.18 The CP's shall monitor the status of all devices on the addressable loops for fire, short-circuit fault, open-circuit fault, incorrect addressing, unauthorized device removal or exchange, pre-alarm condition and contaminated detector condition and shall be printed on the printer on demand. 21.6.19 The CP's shall monitor the status of all internal connection and interfaces including charger, battery and remote signaling functions and shall be printed on the printer on demand. 21.6.20 The CP's shall provide the following discrete visual indications: POWER ON FIRE ALARM FAULT DIABLED/ISOLATED FIRE ZONES

green LED indicator dual red LED indicator yellow LED indicator yellow LED indicator red LED indicator per zone

21.6.21 The Control Panel shall provide the necessary outputs to separately operate two monitored circuits of common system sounders. Each output shall be capable of driving a sounder load of up to 1 A. 21.6.22 The Control Panel shall monitor all critical. system components and interconnections, internal and external, such that a failure which would prevent the correct operation of the alarm functions causes the FAULT indicator to light and a message to be given on the alphanumeric display within 100 seconds of occurrence and shall be printed on the printer on demand.


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21.6.23 The system diagnostic and faults shall also be printed on the printer on demand. Loop short circuit. Loop open circuit. Un configured device Addressable device failure Device not responding Incorrectly configured device Conventional call point wiring open circuit Conventional call point wiring short circuit Conventional detector circuit wiring fault Repeater/repeater LCD, remote printer failure. PSU fault Charger fault Battery fault Battery critical Mains failure Auxiliary PSU failure Signally fault Sounder wiring open circuit Sounder wiring short circuit 21.6.24 To help rapid fault finding and repair, the CP's shall provide text messages to indicate the precise location of where a fault has occurred in the system and that be printed on the printer on demand. 21.6.25 The CP's shall be capable, via a suitable addressable contact monitor module, of monitoring and indicating the status of auxiliary units such as a remote signaling transmitter. 21.6.26 The control panels shall have LED status indication, ON/OFF/TRIP for each smoke fan. The control panel's shall also have manual control for each of the fans for use by the fire officer. The Contractor shall co-ordinate controls operation with Division. 21.7 a.

b. c. d.

Loop interface boards Loop Interface Boards shall be provided to monitor and control two Signalling Line Circuit (SLC) Loops in the system. The Loop Interface Board shall contain its own microprocessor, and shall be capable of operating outputs from the C.I.E in the case of a failure in the Main CPU of the Control Panel. The Loop Interface Board shall not require any jumper cuts or address switch settings to initialise SLC Loop operations. The Loop Interface Board shall provide power to, and communicate with, all of the Intelligent/Addressable sensors and Addressable Modules connected to its SLC Loops over two single pairs of wires. The Loop Interface Board shall receive analogue information from all Intelligent Sensors and shall pass this information for processing to determine whether normal, alarm, or fault conditions exist for that particular sensor. The C.I.E shall include software to automatically maintain the sensor's desired sensitivity level


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by adjusting for the effects of environmental factors, including the accumulation of dust in each sensor. The analogue information may also be used for automatic sensor testing and for the automatic determination of sensor maintenance requirements. 21.8 a. b.

Relay Interface Boards The Relay Interface Boards shall provide 4 outputs each. Each output shall be capable of being used as either a monitored indicating circuit or a relay circuit selectable by means of a switch and software configuration.

21.9 a.

b.

c. d. e. f.

System Circuit Supervision The system shall contain independently supervised initiation and indicating circuit so that a fault in any one zone will not affect any other zone. The alarm activation of any alarm circuit shall not prevent the subsequent alarm operation from any other initiation circuit. There shall be sprinkler supervisory initiation device circuits for connection of all sprinkler valves tamper switches to perform the supervisory service operation. This independent initiation circuit shall be programmed as supervisory circuit and shall differentiate from tamper switch wiring fault or other faults. Alarm control and indication circuit shall be independently supervised. Auxiliary manual controls shall be supervised so that all switches must be returned to the normal position to clear the system trouble. The system shall have provision for disabling and enabling all circuit individually or per zone for maintenance or testing purposes. The test groups shall be programmable. The fire alarm system shall have 3 redundancy levels: By node or panel By circuit By device

21.10

Field Wiring Terminal Blocks

a.

For ease of service all wiring terminal blocks shall be the plug-in type. Terminal blocks permanently fixed or mounted are not acceptable.

21.11

Specific System Operations

a.

A graphical representation a sensor's true analogue value in the form of a rolling histogram showing at least the previous 8 recorded samples. A graphical representation of a sensor's true analogue value in the form of a histogram over a user definable time and utilising a user definable sample period. System Status Reports: Upon command from an operator of the system, a status report will be generated showing information such as system software versions, number of loops fitted and number of relays or indicating circuits fitted. System History Recording and Reporting: The C.I.E shall contain a History Buffer that will be capable of storing up to 1000 system output/input/control events. Each of these events will be stored and time and date stamped with the actual

b. c. d.


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time of the activation. The contents of the History Buffer may be manually reviewed, several events at a time, either on the LCD or the printer. The History Buffer shall use non-volatile memory. Systems that use volatile memory or battery backed memory for history storage are not acceptable. If any intelligent sensor in the system responds with a reading that is below or above normal limits, the system will enter the fault mode, and the particular Intelligent sensor will be annunciated on the System Display, and printed on the optional System Printer. This feature shall in no way inhibit the receipt of Alarm conditions in the system, nor shall it require any special hardware, special tools or computer expertise to perform.

e.

21.12

System Expansion

a.

Design of the main C.I.E shall be such that the system can be expanded in the future (to include the addition of ten percent more signalling line circuit devices) without disruption or replacement of the existing control panel. This shall include hardware capacity, software capacity and cabinet space 21.13

ALARM INDICATING DEVICES

General a. b. c. d. e. f. g. h.

The automatic fire detectors shall be fixed to the installation by mean or plug-in bases. Both an addressable detector base and a conventional detector base shall be available. Both types of bases specified above shall have a mechanical device enabling the base to accept only one of the three main type of detectors, i.e. ionizations smoke optical smoke, and heat. Both types of bases specified above shall incorporate the optional feature of being able to lock the detectors in place once plugged in. Addressable detectors and modules must be able to transmit to the Control Panel a pre- set and unique identifier to detect unauthorized changes in the system configuration. The manufacturer shall produce standard equipment for installing smoke detectors in air ducts. This equipment shall be designed to ensure compatibility between the detector and addressable module. It must be possible to connect and mix automatic detectors, manual call points and addressable units. The manufacturer shall have available suitable equipment to test and exchange all three main types of automatic detectors. The manufacturer shall have available intrinsically safe versions of all three types of automatic detectors, the plug-in bases and the line isolator.

21.14

Intelligent Photoelectric Smoke Sensors

a.

Smoke Sensors shall be intelligent and addressable devices and shall connect with two wires to one of the C.I.E. Signalling Line Circuit loops.


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b.

The Sensors shall use the photoelectric (light-scattering) principal to measure smoke density and shall, on command from the C.I.E, send data to the panel representing the analogue level of smoke density.

c.

The Sensors shall be ceiling-mount and shall include a twist-lock base.

d.

The Sensors shall provide a means of test whereby they will simulate an alarm condition and report that condition to the C.I.E. Such a test may be initiated at the Sensor itself (by activating a magnetic switch) or initiated remotely on command from the control panel.

e.

The Sensors shall provide dual LEDs. Both LEDs shall flash under normal conditions, indicating that the Sensor is operational and in regular communication with the C.I.E. Both LEDs may be placed into steady illumination by the C.I.E, indicating that an alarm condition has been detected. If required, the flashing mode operation of the Sensor LEDs shall be controlled through the system field program. An output connection shall also be provided in the base to connect an external remote alarm LED.

f.

The Sensor sensitivity shall be set through the C.I.E, and shall be adjustable in the field through the field programming of the system. Sensitivity may be automatically adjusted by the panel on a time-of-day basis.

g.

Using software in the C.I.E, the Sensors may automatically compensate for dust accumulation and other slow environmental changes that may affect their performance. The detectors shall meet the calibrated sensitivity test requirements of UL/EN54. 21.15

INTELLIGENT HEAT SENSORS

1.1 Heat Sensors shall be intelligent and addressable devices, and connect with two wires to one of the C.I.E. Signalling Line Circuits.

shall

1.2

The Sensors shall use an electronic sensor to measure thermal conditions caused by a fire and shall, on command from the C.I.E, send data to the panel representing the analogue level the temperature at the sensor. 1.3

The Sensors shall be ceiling-mount and shall include a twist-lock base.

1.4

The Sensors shall provide a means of test whereby they will simulate an alarm condition and report that condition to the C.I.E. Such a test may be initiated at the Sensors itself (by activating a magnetic switch) or initiated remotely on command from the C.I.E.


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1.5

The Sensors shall provide dual LEDs. Both LEDs shall flash under normal conditions, indicating that the Sensor is operational and in regular communication with the C.I.E. Both LEDs may be placed into steady illumination by the C.I.E, indicating that an alarm condition has been detected. If required, the flashing mode operation of the Sensor LEDs shall be controlled through the system field program. 1.6

The Sensors shall meet the calibrated sensitivity test requirements as detailed by UL/EN54.

21.16

Addressable Manual Call Points

a.

Addressable Manual Call Points shall be provided to connect to the Fire Alarm Control Panel Signalling Line Circuit (SLC) Loops.

b.

The Manual Call Points shall, on command from the Control Panel, send data to the panel representing the state of the manual switch. Manual Fire Alarm Call Points shall use a key operated test without the need to break the glass, and shall be designed so that after Emergency operation, they cannot be restored to normal use except by the replacement of the glass element.

c.

All operated stations shall have a positive, visual indication of means of an LED indicator.

d.

Manual Call Points shall be constructed of flame retardent plastic with clearly visible operating instructions provided on the glass. The word FIRE shall appear on the front of the Call Points.

e.

Manual Call Points shall be suitable for surface mounting, or semi-flush mounting as shown on the plans.

21.17

Projected Beam Detector:

operation by

2.1

The projected beam type smoke detector shall be a 4-wire 24 VDC device to be used with U.L. listed separately supplied 4-wire control panels only.

2.2

Unit shall be listed to U.L. 268 and shall consist of a separate transmitter and receiver capable of being powered separately or together.

2.3

The detector shall operate in either a short range (30–100 ft.) or long range (100–330 ft.) mode. The temperature range of the beam shall be –22°F to 131°F.

2.4

The detector shall feature a bank of four alignment LEDs on both the receiver and transmitter that are used to ensure proper alignment of unit without special tools.

2.5

The beam detector shall feature automatic gain control which will compensate for gradual signal deterioration from dirt accumulation on lenses.

2.6

The unit shall include both ceiling and wall mounting brackets. Testing shall be carried out using calibrated test filters or a magnet activated remote test station.


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21.18

ADDRESSABLE MODULE

a. Provide control to audible and/or relay functions for bell units, the magnetic door holders, etc. b. be capable of delivering its power directly off the addressable loop or via separate 24V supply from the control panels. c. Be enclosed in a pre-fabricated enclosure (IP 42 rating).

21.19

MONITOR MODULE

1. Addressable Monitor Modules shall be provided to connect one supervised area of conventional Alarm Initiating Devices (any N.O. volt free contact device) to one of the C.I.E. Signalling Line Circuit (SLC) Loops. a. The Monitor Module shall mount in a purpose made surface mount box. b. In areas with restricted access, the Monitor Module shall be available in a miniature version.

21.20

LINE ISOLATOR MODULE

Provide isolator module/Isolator base in every zone and between 15 devices within the same zone.

21.21 •

PROGRAMMABLE ELECTRONIC SOUNDERS Electronic sounders shall operate on 24 VDC nominal.

• Electronic Sounders shall be field programmable without the use of special tools, to provide fast sweep, slow sweep, continuous, or buzz tones with an output sound level of at least 90 dBA measured at 1 metre from the device. • Low dB pre-signal bells with visual indication shall be installed on staff bases. •


Shall be flush or surface mounted as shown on plans.

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21.22 i)

INSTALLATION

Install the system in accordance with the recommendations of the manufacturer and BS 5839 pt 1. Install the system in accordance with NFPA requirements covering the Installation of fire alarm systems and Dubai Civil Defense. Device locations are indicated diagrammatically. Locate devices to suit room dimensions, ceiling grid clearances from obstructions, codes and any other factors affecting the installation. All conduit, junction boxes, conduit supports and hangers shall be concealed in finished areas and may be exposed in unfinished areas. Smoke detectors shall not be installed prior to the system programming and test period. If construction is ongoing during this period, measures shall be taken to protect smoke detectors from contamination and physical damage. The Contractor shall review mechanical drawings and specifications and all electrical drawings and ensure all fans, supervised valves, pressure switches, flow switches, magnetic doors, locks and any other device that is monitored or controlled by the fire alarm system, is included in the fire alarm system control and monitoring functions. No splicing of cables shall be permitted; all cable connection shall be made at the equipment terminals.

ii) iii) iv)

v)

vi) vii)

Allow 10% spare capacity on each loop.

21.23

TYPICAL OPERATION

Actuation of any manual call point, smoke detector heat detector or water flow switch shall cause the following operations to occur unless otherwise specified: •

Activate all programmed indicating circuits until silenced.

•

Activate all strobe units until the panel is reset / silenced.

•

Annunciate the active initiating devices and zones.

• Release all magnetic door holders on doors to adjacent zones on the floor from which the alarm was initiated. •

Return all elevators to the primary or alternate floor of egress.

•

Duct type smoke detectors shall, in addition to the above functions hut down the ventilation system or close associated control dampers as appropriate.

21.24

INSPECTION AND VERIFICATION

Upon completion, arrange for the manufacturer to make a complete inspection and adjustment of the system including all components, to ensure that: 1. The system complies with the Contract documents, the manufacturer's


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recommendations, and the applicable codes and standards. 2. The system functions in accordance with the drawings and specification in both the supervisory and alarm modes, including testing or operation of all alarm initiating devices to verify their operation and zoning. 3. Provide staff as requested by the manufacturer as well as any required equipment such as ladders and scaffolding. Obtain information on staff requirements from the manufacturer before submitting a Tender. 4. Submit the following to the Engineer: • Certificate of verification confirming that inspection has been completed and listing the conditions on which the inspection and verification are based. • Test report on all equipment checked during verification, including panels, annunciators, bells, manual stations and automatic detectors. •

Manufacturer's proof of liability insurance and inspection.

5. The system will not be accepted without written confirmation from the manufacturer that the system has been installed to his recommendations has been verified and is ready for total acceptance. 6. Arrange for the manufacturer to demonstrate the operation of the system to Owner, and to instruct Owner's staff in its operation and maintenance to Owner's satisfaction. 7. Ensure that the manufacturer's testing is complete and turn over the test reports to the Engineer before the inspection and testing begins. 8. Provide a minimum of twelve (12) days on site staff training for the duration of the twelve (12) months defects and liability period. The Engineer shall allocate the training days during commissioning. The Contractor shall assume for Tender purposes that the twelve (12) days shall be split over the twelve (12) months with one day per month.

21.25 21.25.1

TESTING AND COMMISSIONING

Preliminary Tests Upon the complete on of the installation, the system shall be subject to functional and operation performance tests including test of each installed initiating and notification appliance. Tests shall include the meggering of all system conductors to determine that the system is free from grounded, shorted or open circuits. The Megger test shall be conducted prior to the installation of fire alarm equipment. If deficiencies are found corrections shall be made and the system shall be retested.

21.25.2

Acceptance Test


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a.

b. c. d. e. f. g. h. i. j. k. l.

m. n. o.

Provide the service of competent, factory-trained Engineer or technician authorized by the manufacturer of the fire" alarm equipment to technically supervise and participate during all of the adjustments and commissioning of the system. Testing shall be in full accordance with NFPA 72 section 7.2.2. Before energizing the cables and wires, check for correct connections and test for short circuits, earth faults, continuity and insulation. Verify activation of all flow switches. Open initiating device circuits and verify that the fault signal actuates. Open signaling line circuits and verify that the fault signal actuates. Open and short indicating appliance circuits and verify that fault signal actuates. Earth initiating device circuits and verify respect of fault signals. Earth signaling circuits and verify response of fault signals. Earth indicating, appliance circuits and verify response of fault signals. Check presence and audibility of tone at all alarm notification devices. Check installation, supervision and operation of all intelligent smoke sensors during a walk test. Each of the alarm conditions that the system is required to detect shall be introduced on the system. Verify the proper receipt and the proper L. processing of the signal at the Fire Panel and the correct activation of the control points. Testing shall include all auxiliary functions, such as elevator recall, fan shut off, and damper operation. The use of open flame or live smoke will not be permitted. Submit seven (7) copies of the approval certificate and verification report to the Engineer after completion. Insert one (1) copy in the operation and maintenance manuals. Demonstrate complete system to Dubai Civil Defense for their approval and certification.


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SECTION – 22

LIGHTNING PROTECTION SYSTEM

Not Applicable

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SECTION – 23

CCTV SECURITY SYSTEM

Not Applicable

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SECTION – 24

ACCESS CONTROL SYSTEM

Not Applicable

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SECTION – 25 25.7 i)

TELEPHONE SYSTEM

SCOPE OF WORK The Contractor shall be responsible for the fixing of trunking, conduits, internal distribution wires. Telephone sockets, distribution frames and the provision for entry of external cables into the buildings and as indicated on the drawings or as detailed in the specification shall also be installed and provided by the Contractor.

ii)

All work shall be as per Etisalat regulations and approval.

iii)

This Network shall serve the telephone and the Cable TV Network.

25.8 a.

iv)

EQUIPMENT CRITERIA All voice cabling from the Main Distribution Frames located in the Etisalat equipment room to the floor TJB’s shall be multi core category 3 cables fixed to galvanized steel cable tray. All Equipment products and installation practices will be in conformity if not more to Etisalat requirements.

25.9

MATERIALS All equipment not supplied by Etisalat and required for the project shall be from a single manufacturer and shall have 15 years warranty.

25.10

MAIN DISTRIBUTION FRAME (MDF) The MDF shall be supplied by Etisalat as per Etisalat requirements.

25.11

25.5 TELEPHONE JUNCTION BOX (TJB) The TJBs shall be dedicated to serve each floor and shall be located on the floor Telecom room. These shall be supplied by Etisalat.

25.12

25.6 TELEPHONE SOCKET OUTLETS Outlets shall be one gang RJ45 type confirming to EIA/TIA TSB 40-A : 1994 and BS 5733 : 1995 on a Flush Moulded Plastic Front plate as per Etisalat approval. Back boxes are to be with all round flange for flush fit. One piece moulded lug automatically snaps into place. No rear projections clamp devices on cable entry will accommodate partition thickness between 6mm and 16mm . Earth terminal facility to be included. Conform to BS 4662 : 1970 as applicable.

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25.13

CABLING All internal cables are to be as per Etisalat specifications No. CS 14 and installed on the same standard. It is Etisalat responsibility to lay and terminate incoming trunk cables to MDF, on raceways and cable trays provided by the Contractor.

25.14

TESTING & EXECUTION

25.15 a. b.

COPPER TESTING Category 3 backbone cables shall have 100 percent of the cables tested according to ISO/IEC Class A, B or C. All other testing shall be as per relevant BS Standards and Etisalat requirements

25.16

EXECUTION Contractor shall furnish and install in accordance with manufacturer’s instructions and as shown on plans, all wiring, outlet boxes required for the erection of a complete system as described herein and as shown on the drawings. Furnish all wire of type specified herein before installed in concealed conduit. All wires shall test free from ground or crosses between conductors. Make the final connections between equipment and the wiring system under direct supervision of a representative of the Client.

25.17

ADMINISTRATION DOCUMENTATION

25.18

LABELING Horizontal and backbone cables shall be labeled at each-end. The cable or its label shall be marked with its identifier.

25.19

DRAWINGS As-built drawing shall be supplied by the Contractor showing the locations of and -identifiers for all: 1. Horizontal cable routing and terminations 2. Telecommunications outfits/connectors 3. Backbone cable routing and terminations

25.20

RECORDS All records shall be created by the installation Contractor and turned over at the completion of work. The format shall be computer based and both soft copies and hard copies shall be part of the As-built package. The minimum requirements include: 1. Cable records must contain the identifier, cable type, termination positions at both ends, splice information as well as any damaged pairs/conductors.

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2. Connecting hardware and connecting hardware position records must contain the identifier, type, damaged position numbers, and references to the cable identifier attached to it. 3. Test documentation on all cable types shall be included as part of the As-built package.

25.21 i)

INSTALLATION The maximum cable pulling tensions shall not exceed manufacturer's specifications.

ii)

The maximum cable bend radii shall not exceed manufacturer's specifications.

iii)

In spaces with UTP cable terminations, the maximum bend radius for 4-pair cable shall not exceed four times the outside diameter of the cable and ten times for multi-pair cable. This shall be done unless this violates manufacturer specifications.

iv)

During the actual installation, bend radius on 4-pair cable shall not exceed eight times the outside diameter of the cable and ten times for multi-pair cable. This shall be done unless this violates manufacturer specifications.

v)

In telecommunications room/closets a minimum of 3m (10ft) of slack should be lift for all cable type. This slack must be neatly managed on trays or other support types.

vi)

Tie wraps shall be used at appropriate intervals to secure cable and to provide strain relief at termination points. These wraps shall not be over tightened to the point of deforming or crimping the cable sheath.

vii)

Hook and loop cable managers should be used in the closet where reconfiguration of -cables and terminations may be frequent.

viii)

All grounding / earthing and bonding shall be done to applicable codes and regulations.

ix)

Properly installed fire-stop systems shall be installed to prevent or retard the spread of fire, smoke, water, and gases through the building. This requirement applies to openings designed for telecommunications use that mayor may not be penetrated by cables, wires, or raceways.

x)

Fire stops shall be done to applicable codes.

xi)

All work shall be done in a workman like fashion of the highest standards in the telecommunications industry. All equipment and materials are to be installed in a neat and secure manner, while cables are to be properly dressed. Workers must clean any debris and trash at the close of each workday.

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SECTION – 26

26.1

TELEVISION DISTRIBUTION SYSTEM

SCOPE OF WORK

1) 26.2

Contractor shall install provisional conduits with pull wire , television distribution system equipments is for reference. DESCRIPTION

i)

Allow for Design, Install and commission a SMATV Distribution System of an approved design capable of receiving and distributing all present transmissions as listed with sufficient allowances made to include any future transmissions, within the foreseeable future without degradation of the system parameters in complete compliance of the drawings and specifications. Allowance shall also be made for all necessary items to form a complete and functional system whether or not such item are specifically mentioned. The designer shall also be the installer and the authorized representative the system, strictly for quality assurance.

The systems to be provided will be IF. The system will be for the apartments. The IF system will be digital and analogue signals, these will not be processed or modulated. The signal will be distributed from the dish to every single point in the apartment as per the drawings. The local channels will be on RF on the same cable. At the wall outlet (TV socket) in apartments a digital receiver is required to watch any satellite channels. However the local channels can be seen directly through the TV set.

2)

26.3

The signal will be split and amplified as needed to ensure proper signal level at every TV one Coaxial wire will go to every TV socket (star distribution) which will have 3 connections CHANNELS

Channels: the channels will be as listed herewith and/or as agreed with by the Client Terrestrial Dubai

2, 10, 33

Sharjah

22

Abu Dhabi 6, 43 Ajman

26

Satellites (IF) Arabsat 3A Nile Sat Hot Bird

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The aerials masts and the dish antennas shall be located on the roof and the headend amplifiers in the telephone/electrical room, to the approval of the Engineer. The aerials shall be installed on an adequately designed masts on the roof. The mast shall be rigidly supported by adjustable guywires and shall withstand a wind velocity of 160 kmph. The mast shall be earthed. The system should receive maximum channels from the three satellites with repeating the same channels. 26.4 i)

SYSTEM PARAMETERS Comply with BSI code of practice 8S 6330 1983.

ii)

Conform to an overall minimum total signal/cross modulation ratio of 46dB with a maximum output for all present and future programmes set with an allowance of at least 3da output under all known conditions.

iii)

Conform to a minimum 42dB signal/noise ratio for all stipulated programmes except by agreement where received signals will not allow this condition.

iv)

A pre-planning site survey will take into account the following factors, which must be satisfactory as agreed by a representative of the authority. a. Adequate signal levels to provide the specified signal/noise ratio or an agreed -satisfactory subjective result. b. Clean signals free from reflections and co-channels interference effects. c. Regards to be paid to any very high-level local field strengths leading to possible immunity and pre-image problems. d. Possibility of interference from any source that may interfere with the system performance.

26.5 i)

EQUIPMENT The system shall be of a modular construction, thus making it possible to add extra stations at a later date.

ii)

The system shall be designed to function on field strength levels of local transmissions. However, the distribution system shall be designed based on the highest transmission frequency within the system based on a combined output level from the channel amplifier of 118dBuV.

iii)

The system shall be manufactured by a single supplier and mounted within a steel cabinet with mechanical ventilation.

iv)

13 amp test socket shall be installed within the cabinet for the future connection of signal test equipment to aid the service requirement.

v)

Head End The head end station shall be the extensible type and consist of stabilized protected power suppliers, converters, preamplifiers, attenuates, filters etc. as required. All channels shall be converted and remote stations shall be provided with pre-amplifiers. Local channels shall be converted to avoid adjacent

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and co-channel interference and to aid distribution.

vi)

The input and output converters for the terrestrial and satellite system shall have the following features:. 3) 4) 5) 6) 7) 8)

26.6

Suitable for adjacent channel operation. Output level 115dBuv with integrated combiner amplifier Power supply unit for maximum eight channel processor groups PSU with integrated dual power injector for satellite converters and, additional 18V output port. Loop through arrangement for satellite input modules. Satellite input frequency range 950 to 2050 Mhz

MATERIAL

The system shall include but not limited to the following equipment: Dish Farm: -

Arabsat 3A (Digital) 1.8m solid dish with Quattro LNB (4 outputs) Nile Sat (Digital) 1.8m Solid dish with Quattro LNB (4 outputs) Hot Bird (Digital) 1.8m Solid dish with Quattro LNB (4 outputs) Terrestrial Antennas 3 Local antennas for (10, 33, 43)

Distribution Network: a. b. c. d. e.

Coaxial Cables TV Sockets (TV, FM and SAT) Multi switches IF/RF amplifiers VHFIUHF Channel Amplifier with AGC +10 –12dB and frequency converter including all necessary power supply and mounting accessories.

All necessary sockets, cables splitters, taps and filters IF/IF converter 26.7

AERIALS i)

The UHF aerials to be of a double boom design so as to increase the stability of the incoming signal. The aerials should have a mini mum life expectancy of 10 years and should be:

ii)

Corrosion Resistant a. Bracket:

Hot galvanized steel sheet, 4mm thick coating at feast 70mm.

b. Antenna Support:

Hot galvanized steel tube 4 x 20 x 2mm coating at least 70mm.

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c. Supporting Tube: d. Director Elements Aluminum: e. Gain: 26.8 i)

Aluminum 20 x 20 x 2mm chromated. 10 x 1 mm chromated. >16.5dB

SATELLITE SYSTEM The satellite system shall meet the following specification.

ii)

IF/RF Amplifiers The amplifiers shall be with return path and gain controller. Specifications: a. b. c. d. e. f. g. h. i. j. k.

iii)

Amplified band IF gain MATV gain Return path gain (5-30 MHz) IF attenuator IF equalizer MATV attenuator MATV equalizer Return path attenuator Max. output level LNB current (13/17 V)

: : : : : : : : : : :

5-2150 MHz 30-40-dB 30-40 dB 12 dB 0-20 dB 0-12 dB 0-20 dB 0-20 dB 0-20 dB 120 dB 300 mA

Compact IF/IF Conversion (12 processor) Specifications:

26.9

a. Input freq. range

:

950-2150 MHz

b. Output freq. range

:

950-2150 MHz

c. IF

:

480 MHz

d. IF filter bandwidth

:

27/36 MHz

e. Max. Input level

:

52 to 75 dB

f. Max. Output level

:

75 dB

g. Channel spacing

:

30/40 MHz

h. Adjustable Attenuator

:

0 to 20 dB

i. Coupling loss

:

5 to 7 dB

j. Consumption

:

500 Ma

CHANNEL AMPLIFIER AND CONVERTER i)

The output RF signal is to have an output dB limiting circuit in order to avoid the entry of unwanted frequencies into the other cascaded equipment.

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9)

Solid mechanical modulator design with high quality double screened Inter-connection leads .

10)

In order to obtain maximum stability and harmonic free pictures from the Head End each incoming channel shall have an input and an output converter with the vision IF carrier of 38.9 MHz and the sound carrier of 33.4MHz.

11)

The TV input channel shall have the following specifications:

-

ii)

Image frequency reduction 120dB via 2 stages of 3-circuit-filters. Average gain: 42dB '-Attenuation range: -18dB " AGC range: +10 -12dB Noise figure: max 10dB {independent of the AGC states) Max output level: 114dBuV Oscillator drift: +1- 5kHz Group delay: +1- 70ns The TV output channel shall have the following specifications: Average gain: 19dB Attenuation range: 18dB AGC range: +1-2dB Max output level: 125dBuV Output adjustment range: -17dB

The output circuit shall be constructed in such a way that the picture content and sound carrier level variations do not effect the output level. .

- Oscillator drift:

+1-5kHz

- Group delay:

+1-20ns

- Output Monitor point:

-25dB

iii)

Provide power suppliers to cover the required load and extra power supply capacity, shall be given within the unit to add a possible 2 extra channels at a later date.

iv)

Loop through arrangement for satellite input modules shall be made available.

v)

PSU with integrated dual power injector for Satellite converters and additional I&V output port to be made available.

26.10 i)

TV/FM OUTLETS The system of outlets shall be flush-mounted, isolated, safe double coaxial sockets with FM/AM radio and TV outlets. The output plates shall be finished to match other electrical accessories within the area they are installed. All outlets shall be wired in radial system for room with no looping of outlets being allowed

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ii)

The outlets shall be used as terminal outlets.

iii)

All outlets shall be furnished to match the power accessories being installed. Refer to Section 16422.

iv)

All outlets shall be engraved FM and TV respectively.

v)

All outlets shall befitted with a terminal resistor of 75 OHMS and a side loss of 1 dB.

26.11 i) ii)

26.12

CABLES Low Loss 75 coax cable to be used for trunk feeder and sub-distribution circuits. Typical Loss for the coax cable shall be as follows, based on 100 meters at 860 MHz.

2.1

For internal room wiring:

18dB / 100mm

2.2

For Trunk Feeder & Main line:

12dB / 100mm

iii)

The above is only a typical cable, the final cable type to be subject to actual distances, cable losses and manufacturers recommendations.

iv)

All cables shall be ferruled for easy maintenance.

MANUFACTURERS The complete Master Antenna System shall be manufactured by one of the following

- Philips - Grundig - Hirschman - Wisi - Fubi 26.13

INSTALLATION i)

The complete Master Antenna System shall be installed and commissioned by the equipment manufacturer's approved licensed supplier.

ii)

All cabling shall be segregated from all power cabling.

iii)

Provide all necessary frame work, fixings concrete plinths, etc. for the support of the aerials and satellite dishes.

iv)

The aerial mast shall be bonded to the roof lighting protection system.

12)

The mast assembly to be designed and submitted for approval prior to commencing works. All load and wind factors must be taken into consideration when designing the mast.

13)

All cable entries through external walls shall be made weatherproof.

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14)

Loop-in wiring system will not be permitted. Each outlet point shall be independently wired from a junction box located in each apartment.

v)

Demonstrate the operation of the system to the satisfaction of the Engineer and Owners Representatives.

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SECTION – 27

PUBLIC ADDRESS AND SOUND SYSTEM

Not Applicable

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SECTION 28 TESTS & CERTIFICATES 28.1

General

After completion of the Electrical Work, the complete systems shall be tested thoroughly before commissioning. Any modifications or repairs necessary on completion of the tests shall be done at the Contractor's expense. The tests outlined herein shall be in addition to, and not substitution for, the tests of the individual items at the manufacturer's plant. Insulation and grounding resistance test shall be made before operating tests. Proper rotation shall be determined before permanent connections are made. All testing equipment on Site shall be provided by the Contractor. The Contractor shall make the necessary openings in the circuits, for the testing instruments and shall place and connect all instruments, equipment, and devices necessary for the tests. Upon completion of the tests, these shall be removed and all circuits connected to their permanent condition. The tests shall be conducted in the presence of the Engineer and local power authorities representative. The Engineer shall be notified seven calendar days or more in advance when any test is to take place, and it shall not be started without his permission. Certificates when so required shall be submitted for any equipment installed under this contract originating by an authorized inspecting body in the country of the manufacturer. Unless otherwise specified, the Contractor shall supply the electric current necessary for the tests. The Contractor shall state and guarantee the particulars as specified in his tender documents. Such guarantees shall not be departed from, without written permission by the Engineer. If such guarantees are not respected, the Engineer has the right to reject the faulty equipment. The Contractor shall submit four copies of all tests results. Test shall include the following: -

Insulation megger tests on wires. Continuity and resistance tests. Socket outlets proper wiring tests. Operational tests on all electrical equipment. Insullation resistance tests of motors. Testing of lighting installations.

28.2

Insulation Megger Tests


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Tests for insulation level shall be a 500-volt Megger. A minimum of one megohm (1,000,000 ohms) applying to the complete installation shall be obtained. This means that when all the phase wires at the panelboard are connected together and to the testing instrument, all switches closed, all appliances inserted in the circuit, all neutral wires left in the air, and the other end of the Megger is connected to the grounding, then there shall be a minimum of 1 megohm between the whole of the installation taken together and the grounding.

28.3

Continuity & Resistance Tests

A continuity test to ensure that all connections have been made properly shall be made. This can be done by the use of a bell set. Test shall also include ensuring all switches and other interrupting devices breaking the phase wire and not the neutral wire. Test shall include, in addition to checking continuity of current carrying wires and cables, continuity of grounding conductors. This shall be done through a Megger which shall produce an alternating current of a magnitude equal to one and a half times the rating of the circuit under test with a maximum of 25 amps.

28.4

Socket outlets Proper Wiring Test

All socket outlets shall be connected properly such that looking at the face of the socket outlet the live connection shall be on the right, the neutral on the left and the earthing at the top.

28.5

Operational Tests

The Contractor shall demonstrate the proper operation of circuit breakers, switches and any other equipment as requested by the Engineer, or as specified elsewhere in these Specifications. Each motor and associated equipment shall be run as nearly as possible under normal operating conditions for as long a time as is necessary to domonstrate correct alignment, wiring capacity, speed, and satisfactory operation. The motor shall be loaded to full capacity, or as near there to as possible. 28.6

Insulation Resistance Tests of Motors

All motors shall be tested for insulation in accordance with the requirement of IEC Standard Two copies of the test data shall be submitted.

28.7

Testing of Lighting Installation

The Contractor shall demonstrate the proper operation of all lighting fixtures.


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APPENDIX A: APPROVED MANUFACTURE

Specs

Material

Manufacturer

Local Agent

Ref.

20

07

03

Stand-by Generator Sets

a)

Caterpillar (USA)

Al Bahar . Sharjah

b) c)

F.G Wilson (UK) ONAN (USA)

Technical Reserourses Bhatia Engg. Co., Dubai

d)

Dawson Keith

-

Automatic Transfer

a)

Caterpillar (USA)

Al Bahar . Sharjah

Switch

b)

ABB

-

c)

Zenith Control

-

d)

Moeller

-

e)

Schneider Electric

-

a)

Merlin Gerin (France)

Verger Et. Delporte, Dubai

b)

Dorman Smith (UK)

DormanSmith Switchgear

Main Distribution Boards

c)

09

ABB (Europe)

Asea Brown Boveri, Dubai

d)

Klockner Moeller

Juma Al Majid Est., Dubai

e)

Siemens (Germany)

Scientechnic, Dubai

a)

ABB (Europe)

Asea Brown Boveri

b)


Verger Et. Delporte,

c)

Dorman Smith (UK)

Dorman Smith switchgear

d)

Klockner Moeller


e)

Siemens (Germany)

Scientechnic, Dubai

Sub-main Distribution Boards

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10

08

05

04

13

Distribution Boards

Motor Control Centers

Motors and Starters

Capacitor Banks

PVC Conduits and Fittings

a)


Verger Et. Delporte, Dubai

b)

Dorman Smith (UK)

Dorman Smith switchgear

c) d)

ABB (Europe) Klockner Moeller

Asea brown boveri Juma Al Majid Est., Dubai

e)

Siemens (Germany)

Scientechnic, Dubai

a)

ABB (Europe)

Asea Brown Boveri

b)

Cutler Hammer (UK)

Danway, Dubai

c)


Verger Et. Delporte,

d)

Klockner Moeller


e)

Allen Bradley (USA)

Bin Ghalib Eng. Sharjah

f)

Siemens (Germany)

Scientechnic, Dubai

a)

GE (USA)

Electromac Est., Dubai

b)

Allen Bradley (USA)

Bin Ghalib Eng. Sharjah

c)

Cutler Hammer (UK)

Danway, Dubai

d)

Telemecanique (France) Verger Et. Delporte,

a)

ABB (Europe)

Asea Brown Boveri,

b)

Nokia (Finland)

Ibrahim Elect. Eqpt.,

c)

Mitsubishi (Japan)

Gulf dynamic switchgear

a)

Decoduct (UAE)

Interplast Co. Ltd.,

b)

Egatube (UK)

Bahri & Mazroei Trad. Co.

c)

Marshal Tufflex (UK)

Marwan Elect. and Sanitary Eqpt. Est.

13

PVC Flexible Conduits

a)

Decoduct (UAE)


b)

Ega Tube (UK)

Bahri & Mazroai Trad. Co.

c)

Marshall Tufflex (UK)

Marwan Elect. and Sanitary Eqpt. Est.

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13

13

15

12

13

Metallic Conduits & Fittings a)

Flexible Metallic Conduits

G.I. Boxes

Metallic Cable Trunking

PVC Cable Trunking

Simplex (UK)

Electromech, Dubai

b)

Burn Tubes (UK)

Electromech, Dubai

c)

Barton (UK)

Al Hathboor

a)

Kopex (UK)

b)

Adaptaflex (UK)

Al Hathboor Electrical Est.

a)

MK (UK)

SMKA Electric Co.,

b)

Crabtree (UK)


c)

Barton (UK)

Al Hathboor Electrical Est.

d)

Simplex (UK)

Electromech Est., Dubai

a)

Britmac (UK)

Link Middle Est. Ltd.

b)

Swifts (UK)

Engineering Ent., Dubai

c)

Vantrunk (UK)

Phoenix Gen. Trading Co.

d) e)

Ductile Sections (UK) Salamander (UK)

Al Hathboor Triveni Trading Co. Ltd

f)

Davis (UK)


g)

MK – Ega (UK)


a)

MK-Ega (UK)


b)

Decoduct (UAE)


c)

Marshall Tufflex (UK)

Marwan Elect. and

--

Sanitary Eqpt. Est. 11

Busbar Trunking

a)

Siemens (USA)

Scientechnic, Dubai

b)

Westinghouse (USA)

ETA, Dubai

c)

General Electric (USA) Electromech Est., Dubai

d)

Klockner Moeller


e)

Zuchini

Legrand

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13

PVC Ducts

a)

Hepworth (UK)

Hepworth Co., Dubai

b)

Cosmoplast (UAE)

National Plastic and Building Materials Indust.

14

14

12

19

16

Wires and Cables

a)

Ducab (UAE)

Ducab, Dubai

Lighitng and Power

b)

BICC (UK)

Ducab, Dubai

c)

Pirelli (UK)

Awazi Gargesh

d)

Oman Cable

e)

Riyad Cable

f)

Delta Wires

a)

BICC (UK)

b)

CMP (UK)

--

c)

Hawke (UK)

--

a)

Swifts (UK)


b)

Vantrunk (UK)

Phoenix Gen. Trading Co.

c)

Ductile Sections (UK)

Al Hathboor

a)

CEAG (Germany)

Ceag Middle East Ele,

b) c)

JSB Chloride

-

d)

Mega Light

NAFCO

MK (UK)

SMKA Electric Co.,

Cable Glands & Accessories

Cable Trays and Ladders

Central Battery System

Ducab, Dubai

Wiring Devices & Accessories a)

(White) b)

Crabtree(UK)


c)

Legrand (France/UK)

Al Hathboor

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16

Wiring Devices & Accessories a)

MK (UK)

SMKA Electronic Co.,

(Metallic)

26

16

24

24

21

b)

Crabtree (UK)


c)

Legrand (France/UK)

Al Hathboor

Central Antenna

a)

Fuba (Germany)

Sibca Electronics, Dubai

Television System

b)

Wisi (Germany)

Juma Al Majid. Dubai

c)

Bosch (Germany)

Techtronics, Sharjah

d)

Alcad

Alcad

e)

Philips

-

a)

Legrand (France)

Al Hathboor Elect. Est.

b)

Terraneo (Italy)

c)

Friedland (UK)

MK Group Marketing Office

a)

Alcad

Alcad

b)

Comelit (Germany)

Site Technology, Dubai

c)

Philips

d)

Aiphone (Japan)

Al Zahra Security System,

a)

APT (UK)

Intercare Ltd., Dubai

b)

Elcosta (Germany)

Materials & Marketing Co.

c)

Automatic System

Automatic System

(Belgium)

Corporation, Dubai

d)

Federal APD (USA)

Jos Hansen, Dubai

e)

New Gate (UK)


a)

GENT (UK)

BMTC, Dubai

b)

Cerberus (Switzerland) Elenco, Dubai

Bell System

Interphone System

Parking Barriers

Fire Alarm System

--

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06

26

17

Disconnecting Switches

Voice / CATV / Data

Lighting Fixtures

c)

Edwards (Canada)


d)

Simplex (USA)


e)

Esser

NAFCO

a)

MEM (UK)

Al Jalal Elect.Trading Est.

b)

MK (UK)

SMKA Electric Co., Dubai

c)

ABB (Europe)

d)

Legrand

a)

corning

scientechnic

b)

systemax

bond communication

c)

ortronics

d)

Brandrex

Honeywell

(Refer to Lighting Fixtures Schedule on drawings)

18

24

Earthing & Lightning

a)

Furse (UK)

Tecon Ltd., Sharjah

Protection System

b)

Helita (France)

Elenco, Dubai

c)

BICC (UK)

Ducab, Dubai

d)

Wallis (UK)

Awazi Gargesh

a)

Invensys (USA)

Invensys

b)

Comelit (Italy)

Site Technology, Dubai

c)

Cardkey (UK)

--

d)

Cardax (UK)

--

Access Control System

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Electrical Specs

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