Visual inspection - learning aid. To discover more about an it taken to a note file or read the comme Protective measure(s) against electric shock. Basic fault protection CLICK
SELV
CLICK
PELV
CLICK
Double or Reinforced Insulation
Basic Protection CLICK
Insulation of live parts
CLICK
Barriers or enclosures
CLICK
Obstacles **
CLICK
Placing out of reach **
Fault protection CLICK
Presence of Earthing conductor
CLICK
Presence of circuit protective conductors
CLICK
Presence of main protective bonding conductors
CLICK
Presence of earthing arrangement for combined protective and functional purpose
CLICK
Presence of adequate arrangements for alternative sources, where applicable
CLICK
FELV
CLICK
Choice and setting of protective and monitoring devices (for fault and/or over-current protection)
Non conducting location ** CLICK
Absence of protective conductors
Earth free equipotentia equipotentiall bonding bonding ** CLICK
Presence of Earth free equipotential bonding
Electrical separation CLICK
For one item of current using equipment
CLICK
For more than one item of current using equipment
Additional protection CLICK
Presence of Residual Current device(s)
CLICK
Presence of supplementary bonding conductors
For further reading please refer to: Ins periodic reporting) NICEI
CLICK TO GO TO
Prevention of mutual detrimental influence CLICK
Proximity of non-electrical services & other influences
CLICK
Segregation of Band I & Band II circuits or Band II Insulation used
CLICK
Segregation of safety circuits
Identification CLICK
Presence of diagrams, instructions, circuit charts and similar information
CLICK
Presence of danger notices and other warning notices
CLICK
Labelling of protective devices, switches and terminals
CLICK
Identification of conductors
Cables & conductors CLICK
Selection of conductors for current carrying capacity and voltage drop
CLICK
Erection methods
CLICK
Routing of cables in prescribed zones
CLICK
Cables incorporating earthed armour or sheath, or run in an earthed wiring system, or otherwise protected against nails, screws and the like
CLICK
Additional protection provided by 30mA RCD for cables concealed in walls (where required in premises not under the supervision of skilled or instructed person)
CLICK
Connection of conductors
CLICK
Presence of fire barriers, suitable seals and protection
against thermal effects
General CLICK
Presence and correct location of appropriate devices for isolation and switching
CLICK
Adequacy of access to switchgear and other equipment
CLICK
Particular protective measures for special installations or locations
CLICK
Connection of single pole devices for protection or switching in line conductors only
CLICK
Correct connection of accessories and equipment
CLICK
Presence of under-voltage protective devices
CLICK
Selection of equipment and protective measures appropriate to external influences
CLICK
Selection of appropriate functional switching devices
Visual inspection - Definitions table Protective measure(s) against RETURN
SELV
Separated ext recognised by important thi SELV side sho Pictures!D7
RETURN
PELV
Protected ext side is general will not be sui special install Pictures!B19
RETURN
Double or reinforced Insulation
Double or rein Basic protecti is provided by fault protecti accessible par
Pictures!B31
Basic RETURN
Insulation of live parts
RETURN
Barriers or enclosures
Inspection of t covered with i with the relev intended to p generally not normal servic An understan for the inspec Barriers or en at least IP2X o or enclosure
Presence of CPC
A visual inspe where require Note. Metallic enclosures used for CPC have determi purposes must satisfy the requirements of application of section 543 of BS7671, in terms of continuity, cables, or be f CSA and reliability may also be u RETURN Presence of main protective Main protecti bonding conductors earthing termi include: Steel 1, Water insta installation pi installation pi RETURN Presence of earthing arrangement The installatio for combined protective and conductors to functional purpose should confir area and are c BS7671 the co E.g. IT SUITES purposes only RETURN Presence of adequate Where a suppl arrangements for alternative inspection sh sources, where applicable safety are pre automatic swi generators, in BS7671. FELV RETURN A functional e measures req used for both applied. 1) Ba barriers/enclo protective con Choice and setting of protective and RETURN This section c monitoring devices (for fault and/or over current monit current protection) current, Type, verify confor RETURN
Non conducting location ** RETURN
Absence of protective conductors
None of the in may be marke
Addition RETURN
Presence of residual current device(s)
RCD's should have the operating characteristics as given in section 415 of BS7671. i.e. operating current not exceeding 30mA and operating time not exceeding 40ms.
Addition prot points or circu are intended f current rating installations a
Some of the l in section 7 of The requirement for supplementary equipotential bonding may bonding is generally applicable only to installations 411.3.1.2 of B RETURN
Presence of supplementary bonding conductors
and locations where there is an increased risk of electric shock.
Prevention of mutu RETURN
Proximity of non-electrical services It should be v & other influences occurred, are any part of th
RETURN
Segregation of Band I & Band II circuits or Band II Insulation used
Band I = Voltage too low to cause serious electric shocks e.g. ELV including telecommunications, bell wire, control and alarm circuits. Band II = All voltages used in electrical installations not included in Band I. So all 230/400v supplies are included.
RETURN
Segregation of safety circuits
Segregation o Where every c separate cont separate com separation. Fire alarm and other circuits importance of breakdown of caused by a fa Electromagne another circui resulting from conduit, ducts
Iden Presence of diagrams, instructions, The presence
protective con supply (Regul RETURN
Labelling of protective devices, switches and terminals
The inspector protective de necessary). La circuit breake 1) It is arrange recognised, a rated current i
RETURN
Identification of conductors
The correct id conductors, in This is in addit connection re exceptions* ( identified by c must be identi
Cables a Selection of conductors for current The sizes and carrying capacity and voltage drop trunking syste information t Note: Particular attention should be given to the designer. I cables in contact with thermally insulating available to th material. Erection Methods RETURN Adequate insp installation is Compliance w considered at all equipment equivalent, ar defective so a RETURN Routing of cables in prescribed Cables concea zones 50mm or less appropriate st they are cable zones. RETURN
RETURN
Cables incorporating earthed armour or sheath, or run in an
If a cable cann conduit or SW
G RETURN
Presence and correct location of
Isolation and
appropriate devices for isolation and switching
namely isolati and functional purposes of in however, that provided that requirements
RETURN
Adequacy of access to switchgear
It must be con
and other equipment
have been aff inspection, te
RETURN
Particular protective measures for
The special in
special installations and locations
the risks assoc or minimal clo other risks, su and installatio measures ass
RETURN
Connection of single pole devices
shower etc. This is a visual
for protection or switching in line conductors only
are connected breaker, fuse, the like shoul made in additi conducted lat
RETURN
Correct connection of accessories
The inspector
and equipment
equipment ar well made bot
RETURN
Presence of under-voltage protective devices
where possibl The inspector devices which of a significan They are foun motors. They automatic con inspector sho design require
eneral
Visual inspection - Definitions table - CLICK HE
RETURN
SELV
RETURN
PELV
RETURN
Double or Reinforced Insulation
RETURN
Insulation of live parts
RETURN
Obstacles **
RETURN
Placing out of reach **
RETURN
Presence of main protective bonding conductors
Other examples of extraneous conductive parts include: 1, Central heating and air conditioning systems 2, Exposed metallic structural parts of a buildings 3, Connection to a lightning protection system to the protective equipotential bonding (made in accordance with BSEN 62305)
For the periodic inspection of an existing installation, the inspector will need to make an assessment based on all the relevant circumstances. The electrical safety council technical manual and IEE Guidance note 5: Protection against electric shock and Guidance note 8: Earthing and bonding which give advice to help determine whether or not a conductive part is an extraneous-conductive-part.
RETURN
FELV
RETURN
Choice of setting of protective and monitoring devices (for fault
RETURN
Segregation of Band I and Band II circuits or band II insulation us
RETURN
Presence of danger notices and other warning notices - EXAMPL
RETURN
Labelling of protective devices, switches and terminals - EXAMP
RETURN
Identification of conductors
RETURN
Erection Methods
RETURN
Routing of cables in prescribed zones
RETURN
RETURN
Routing of cables in prescribed zones
