1. The electrical electrical installations installations in in general general shall be as shown in in our electrical drawings and/or in the specifications. 2. The electrical electrical installation installation is to be in accordance accordance with latest edition edition of EDD rules and regulations together with BS7671 wiring standard and latest IEE regulations. 3. All electrical electrical work shall be be executed in a neat and workmanlike manner. All exposed conduits shall be routed parallel or perpendicular to wall and structural structural members. Junction box shall be securely fastened, set true and plump, and flush with furnished surface when wiring method is concealed. 4. All materials materials shall be new and shall be listed and bear the appropriate appropriate label label of Underwriters Laboratories, Laboratories, Inc., or another recognized testing laboratory for the specific purpose. The material shall be the size and type specified on drawings and/or in the specifications. 5. The electrical electrical contractor contractor shall shall verify exact location, location, heights, heights, outlet and switch switch arrangements, arrangements, and equipment prior to rough-in. No additions to the contract sum will be permitted for outlets in wrong locations, in conflict with other work, and so on. The owner reserves the right to relocate any device up to 3m prior to rough-in, without any charge by the electrical contractor. 6. General lighting lighting branch circuits shall be minimum minimum 2.5Sq.mm copper protected single core PVC cable by 10/15A over current devices. Small appliances circuit shall be minimum 4 Sq.mm copper protected single core PVC cable by 20A over current devices, All other circuits are as per load requirements 7. The electrical electrical contractor contractor shall furnish furnish all wiring materials materials and and make all final electrical connections for all permanently installed appliances such as, but not limited to, furnace, water heater, water pump, built-in ovens and ranges, food waste disposer, dishwasher, washing machine and clothes dryer. (These appliances are to be furnished by the owner) 8. Furnish Furnish and insta install ll dimmer dimmer switches switches where where indicat indicated ed 9. All panel board shall shall be furnished with typed card directories directories with with proper designation of the branch-circuit loads, feeder loads, and equipments served. The directories shall be located in the panel in a holder for clear viewing. 10.Upon completion of installation, the electrical contractor shall review and check the entire installation, clean equipment and devices, and remove surplus materials and rubbish from the owner’s property, property, leaving the work in neat and clean order and in complete working condition. The electrical contractor shall be responsible for removal of any cartons, debris, and rubbish for equipment installed by the electrical contractor, contractor, including equipment furnished furnished by the owner or others and removed from the carton by the electrical contractor 11.The entire electrical installation shall be tested to tests prescribed in BS76711992 and that prescribed in the particular specification. 12.Testing of electrical installation shall be done in the presence of engineer.
13. Electrical contractor contractor should submit two copies of test results. Electrical Electrical contractor should check and test the polarity of all sockets installed. 14.Electrical contractor should check and test all ELCB’s at rated current and tripping time shall be recorded. 15.Electrical contractor should measure the insulation resistance of the main cable and submain cables. 16.Electrical contractor should measure the earth loop impedance for the following equipment equipment (a) Sockets (b) Light fittings (c) Main incomers (d) Air conditioners (e) conducting pipes. All db’s shall be with identification of circuit “ Fed from which switch gear and module number” Distribution boards name and rating of main incomer, not more than 10HM is accepted for measuring the earthing test for the complete system installation 17. 18.The electrical contractor shall furnish and install a complete electrical system as shown on our electrical drawings and/or in the specifications, specifications, where there is no mention of the responsible party to furnish, install, or wire for a specific item on the electrical drawings, the electrical contractor will be responsible responsible completely for all purchases and labor for a complete operating system for this item.
1. GENER ENERAL AL
1.1The electrical installations in general shall be as shown in our electrical drawings and/or in the specifications. 1.2The electrical drawings shall be read in conjunction with all relevant architectural architectural and other associated detailed drawings issued along with tender. 2. REGU REGULA LATI TION ONS S
2.1The electrical installation is to be in accordance with latest edition of EDD rules and regulations together with BS7671 wiring standard and latest IEE regulations 3. SCOPE
3.1The electrical contractor shall supply and install a complete electrical system as shown on our electrical drawings and/or in the specifications, specifications, where there is no mention of the responsible party to supply, install, or wire for a specific item on the electrical drawings, the electrical contractor will be responsible responsible completely for all purchases and labor for a complete operating system for this item. 3.2The electrical contractor shall be responsible to co-ordinate with batelco or telephone service provider for internal and external requirements of telephone ducts, manholes, junction boxes, riser trays/trunking. etc., and shall obtain approval from batelco or telephone service provider prior to commencement of the work. 4. MATER ATERIA IALS LS
4.1All materials shall be new and shall be listed and bear the appropriate label of Underwriters Laboratories, Inc., or another recognized testing laboratory for the specific purpose. The material shall be the size and type specified on drawings and/or in the specifications. 4.2Material submittal along with samples to be submitted for the approval of engineer prior to release the order. Unapproved materials must not be used in the site. 5. DRA RAWI WIN NGS
5.1Drawings to be co-ordinate by the contractor with other services and properly dimensioned working drawings to be submitted for the approval of architect/engineer prior to start the work at any section. 6. LOCATI LOCATION ON OF OF OUTL OUTLETS ETS
6.1The electrical contractor shall verify exact location, heights, outlet and switch arrangements, and equipment prior to rough-in. No additions to the contract sum will be permitted for outlets in wrong
locations, in conflict with other work, and so on. The owner reserves the right to relocate any device up to 3m prior to rough-in, without any charge by the electrical contractor. contractor. 6.2Exact location of all the lighting fixtures, detectors, fans, etc., shall be in line with the reflected and coordinated ceiling layouts of various floors, rooms and other relevant furniture layouts. 6.3All lighting switches shall be minimum 10A grid mounting type and shall be suitable for flush installation in concealed system. Switches shall be ganged as per approved shop drawings. drawings. 6.4All switches and wall lights shall be provided at a distance of 150mm from door frame and/or window frame in general, exact location shall be as per approved shop drawings. 7. WIRING WIRING AND INST INSTALLA ALLATION TION METHOD METHOD
7.1All wiring for lights, sockets and switches should be PVC single core cables drawn through heavy guage (BS6099), Wiring in plant areas and in surface installation should be PVC single core cables drawn through G.I conduit only 7.2Minimum conduit size for branch circuit wiring shall be diameter 20mm, The number of wires in one conduit shall not be greater than those specified in the prevailing EDD regulations 7.3Diameter 25mm PVC conduits shall be used for extra low voltage services like Data, Voice and Television 7.4Wherever long length of conduits, pull boxes shall be provided at every 10 meters. 7.5The PVC conduit shall be of a continuous and effective effective means of protection for wiring and a separate earth wire shall be drawn into all conduits 7.6All the PVC conduits shall be laid concealed in the block works or above the ceiling, no conduits to be laid in screed or plaster 7.720% spare conduits shall be provided for future usage for necessary applications. 7.8All external electrical items shall be weather proof and water tight to comply with min. IP65 7.9Space factor in conduits and trunking should be as per EDD recommended. 7.10All adaptable boxes shall have minimum depth of 1.5 times the conduit sizes 7.11All spare/empty conduits shall be provided with pull wires with 200mm extra length 7.12All damaged / unused conduits should be properly sealed 7.13Conduits with draw wires, trunking etc., to be provided for thermostats and associated control wiring as per approved A/C drawings and mechanical drawings.
7.14Where suspended ceiling exists, exists, the conduit may run on the structural structural soffit 7.15All necessary supports shall be provided to install all electrical items in an approved manner 7.16All recessed fittings shall suit to approved type of false ceiling 7.17Metal clad type accessories shall be installed in all plant areas. Other areas wiring accessories shall be molded ivory finish unless otherwise mentioned 7.18All circuit switches and sockets are to be identified properly by labels 7.19All general socket outlets shall be rated 13A and rectangular pin type to BS1363, unless otherwise specified. 7.20Bending radius of all cables shall not be less than specified in the IEE regulations, Chapter 52, Section 529.3, Table 52C during installation 7.21All openings made for cable trays, trunkings, conduits, ducts in riser shaft, slabs, walls and such other places in building shall be sealed with fire resistant material in an approved manner 8. MOUNTING HEIGHTS 8.1Lighting switches/push switches/push buttons 1300mm 8.2 Socket outlets 400mm / above bench/ 1300mm in plant rooms 8.3 Telephone outlets 400mm 8.4Weather proof socket socket outlets 1300mm 8.5Sp 5Spur and DP switches 1300mm /@H /@H/L ceiling void (for A/C units) 8.6 Bells 2000mm 8.7Wa 7Wall mounted light fittings 1800mm/to arch requirements 8.8 Distribution boards 1800mm (Top) 8.9 Break glass unit 1300mm All distance are measured from the centerline of each item from finished floor level 9. CO COND NDUC UCTO TOR R SIZE SIZE
9.1General lighting branch circuits shall be minimum 2.5Sq.mm copper protected single core PVC cable by 10/15A over current devices. Small appliances circuit shall be minimum 4 Sq.mm copper protected single core PVC cable by 20/32A over current devices, All other circuits are as per load requirements 10.LOAD BALANCING
10.1The electrical contractor shall connect all loads, branch circuits and feeders as per the approved panel schedule, but shall verify
and modify these connections as required to balance connected calculated loads to within 10 percent variation 11.APPLIANCE CONNECTIONS
11.1The electrical contractor shall furnish all wiring materials and make all final electrical connections for all permanently installed appliances such as, but not limited to, furnace, water heater, water pump, built-in ovens and ranges, food waste disposer, dishwasher, washing machine and clothes dryer. (These appliances are to be furnished by the owner) 11.2Electric supply for A/C system is part of contract 12.DIMMERS
12.1Supply and install dimmer switches where indicated. 13.EXHAUST FANS
13.1Supply, install and connections for all exhaust fan indicated on the plans. 13.2All roof mounted extract fans shall have heavy gauge housing, stiffened against drumming, complete with sound attenuating curbs and shall be mushroom type. 14.LIGHTING
14.1In general, not more than 10 lights shall be connected to any one lighting branch circuit. Exceptions can be made in the case of lowcurrent-consuming lights. 14.2Wiring for lighting sub circuits shall be carried out by using minimum 2.5 Sq.mm PVC cable for a circuit wattage not to exceed 1000 watts. 14.3The fluorescent fittings shall be HPF of 0.9 PF minimum and switch start type with capacitor to avoid radio interference 14.4All external lights shall be controlled automatically automatically by 24hrs adjustable electromechanical/ electromechanical/ electronics programmable timer switches 15. PANEL /DISTRIBUTION BOARDS 15.1The main Panel Board shall be of wall or floor mounted type, metal enclosed, dust and vermin protected front operated and of clean and modern appearance 15.2The panel board shall be protected to minimum IP53 in accordance with BS 5420 15.3All panel board shall be furnished with typed card directories with proper designation of the branch circuit loads, feeder loads and equipments served. The directories shall be located in the panel in a holder for clear vision 15.4Electrical 15.4Electrical safety labels such as ‘ DANGER’ shall be fixed in front of all distribution boards, incomers and other electrical hazardous
15.5All MCCB’s shall have minimum braking capacity of 14kA for ratings 15-100A, 30kA for 125-400A, 50kA for 400-800A and adjustable overload 15.6All MCB’s shall have minimum breaking capacity of 6kA 15.7All distribution boards shall be equipped with MCB’s and shall incorporate incorporate a set of fixed busbars and a main isolator as shown on drawings 15.8All MCB’s shall be rail mounted in type and they can be readily removed or canted for wiring and inspection 16.BONDING AND EARTHING
16.1Earth bonding to be provided for cold and hot water pipes 16.2All metallic back boxes, Individual Db’s, Incomers shall be earthed properly 17.TESTING AND COMMISSIONING
17.1The entire electrical installation shall be tested to tests prescribed in BS7671-1992 and that prescribed in the particular specification. 17.2Testing of electrical installation shall be done in the presence of engineer. 17.3 Electrical contractor should submit two copies of test results. Electrical contracto contractorr should check and test the polarity of all sockets installed. 17.4Electrical 17.4Electrical contractor should check and test all ELCB’s at rated current and tripping time shall be recorded. 17.5Electrical 17.5Electrical contractor should measure the insulation resistance of the main cable and sub main cables. 17.6Electrical 17.6Electrical contractor should measure the earth loop impedance for the following equipment (a) Sockets (b) Light fittings (c) Main incomers (d) Air conditioners (e) conducting pipes. All db’s shall be with identification of circuit “ Fed from which switch gear and module number” Distribution boards name and rating of main incomer, not more than 10HM is accepted for measuring the earthing test for the complete system installation
18.TELEPHONE
18.1The electrical contractor shall be responsible responsible for the supply and installation of all the conduit work for the telephone installation installation as shown drawings and in accordance with the requirements of BATELCO. The supply and installation installation of all wiring and and equipment will be carried out by others. 18.2Conduits for telephone outlets shall terminate in a flush plastic box with an ivory blanking blanking plate. All conduits shall be complete complete with suitable draw wires installed to enable the system wiring.
18.3The Contractor shall also seek the approval of the BATELCO of the system installed for all conduit runs before commencement of the installation. 19.FIRE ALARM DETECTORS
19.1Supply and install all detectors and associated wiring as per manufacturer’s manufacturer’s instructions and comply with codes of NFPA and CDFSA 20.DOORCUM/VIDEO INTERCOM SYSTEM
20.1Provide conduit and wiring as shown on the drawings in concealed conduits of not less than diameter 25mm and draw wires to be drawn 21.SECURITY SYSTEM
21.1Provide conduit/boxes/pull conduit/boxes/pull wires to be drawn for security system camera/screen camera/screen etc., as approval 22.SATELLITE MAIN ANTENNA TELEVISION (SMATV)
22.1Provide conduits/power supply for boxes/pull wire to be provided from roof to down 23.HOME AUTOMATION SYSTEM
23.1Home automation system shall be provided to meet the requirements of Architects/client if required 24.FINAL SITE CLEAN UP
24.1Upon completion of installation, the electrical contractor shall review and check the entire installation, clean equipment and devices, and remove surplus materials and rubbish from the owner’s property, leaving the work in neat and clean order and in complete working condition. The electrical contractor shall be responsible responsible for removal of any cartons, debris, and rubbish for equipment installed by the electrical e lectrical contractor, contractor, including equipment furnished furnished by the owner or others and removed from the carton by the electrical contractor 25.GUARANTEE OF INSTALLATION
25.1The electrical contractor shall guarantee all work and materials for a period of one full year (DLP – Defect liability period) after final acceptance by the architect/engineer, architect/engineer, electrical inspector and owner
