Visual Inspection - Interactive Guide
-
Upload
simeon-peach -
Category
Documents
-
view
243 -
download
0
Transcript of Visual Inspection - Interactive Guide
-
8/3/2019 Visual Inspection - Interactive Guide
1/26
CLICK SELV
CLICK PELV
CLICK Double or Reinforced Insulation
CLICK Insulation of live parts
CLICK Barriers or enclosures
CLICK Obstacles **
CLICK Placing out of reach **
CLICK Presence of Earthing conductor
CLICK Presence of circuit protective conductors
CLICK Presence of main protective bonding conductors
CLICK
CLICK
CLICK FELV
CLICK
Basic Protection
Fault protection
Choice and setting of protective and monitoring devices (for
fault and/or over-current protection)
Protective measure(s) against electric shock. Basic fault
protection
Presence of adequate arrangements for alternative sources,
where applicable
Presence of earthing arrangement for combined protective
and functional purpose
Visual inspection - learning aid. To discover more about an it
taken to a note file or read the comme
-
8/3/2019 Visual Inspection - Interactive Guide
2/26
CLICK Absence of protective conductors
CLICK Presence of Earth free equipotential bonding
CLICK For one item of current using equipment
CLICK For more than one item of current using equipment
CLICK Presence of Residual Current device(s)
CLICK Presence of supplementary bonding conductors
For further reading please refer to: Ins
periodic reporting) NICEI
Additional protection
CLICK TO GO TO
Electrical separation
Non conducting location **
Earth free equipotential bonding **
-
8/3/2019 Visual Inspection - Interactive Guide
3/26
CLICK Proximity of non-electrical services & other influences
CLICK
CLICK Segregation of safety circuits
CLICK
CLICK Presence of danger notices and other warning notices
CLICK Labelling of protective devices, switches and terminals
CLICK Identification of conductors
CLICK
CLICK Erection methods
CLICK Routing of cables in prescribed zones
CLICK
CLICK
CLICK Connection of conductors
CLICK
Cables incorporating earthed armour or sheath, or run in an
earthed wiring system, or otherwise protected against nails,
screws and the like
Additional protection provided by 30mA RCD for cables
concealed in walls (where required in premises not underthe supervision of skilled or instructed person)
Presence of fire barriers, suitable seals and protection
Identification
Cables & conductors
Selection of conductors for current carrying capacity and
voltage drop
Prevention of mutual detrimental influence
Presence of diagrams, instructions, circuit charts and similar
information
Segregation of Band I & Band II circuits or Band II Insulation
used
-
8/3/2019 Visual Inspection - Interactive Guide
4/26
CLICK
CLICK Adequacy of access to switchgear and other equipment
CLICK
CLICK
CLICK Correct connection of accessories and equipment
CLICK Presence of under-voltage protective devices
CLICK
CLICK Selection of appropriate functional switching devices
Selection of equipment and protective measures
appropriate to external influences
Particular protective measures for special installations or
locations
Connection of single pole devices for protection or
switching in line conductors only
against thermal effects
General
Presence and correct location of appropriate devices for
isolation and switching
-
8/3/2019 Visual Inspection - Interactive Guide
5/26
RETURN SELV
RETURN PELV
RETURN Double or reinforced Insulation
RETURN Insulation of live parts
RETURN Barriers or enclosures
Protective measure(s) against
Pictures!B31
Double or rein
Basic protectiis provided by
fault protecti
accessible par
Separated ext
recognised by
important thi
SELV side sho
Pictures!D7
Pictures!B19
Visual inspection - Definitions table
An understan
for the inspec
Barriers or en
at least IP2X oor enclosure
Protected ext
side is generalwill not be sui
special install
Basic
Inspection of t
covered with i
with the relev
intended to p
generally not
normal servic
-
8/3/2019 Visual Inspection - Interactive Guide
6/26
RETURN Presence of CPC
RETURN
RETURN
RETURN
RETURN FELV
RETURN
RETURN Absence of protective conductors
A visual inspe
where require
have determi
application of
cables, or be f
may also be u
Note. Metallic enclosures used for CPC
purposes must satisfy the requirements of
section 543 of BS7671, in terms of continuity,
CSA and reliability
Main protecti
earthing termi
include: Steel
1, Water insta
installation pi
installation piThe installatio
conductors to
should confir
area and are c
BS7671 the co
purposes only
Where a suppl
inspection sh
safety are pre
automatic swi
generators, in
BS7671.
Presence of main protective
bonding conductors
A functional e
measures req
used for both
applied. 1) Ba
barriers/encloprotective con
This section c
current monit
current, Type,
verify confor
Choice and setting of protective and
monitoring devices (for fault and/or over
current protection)
Presence of earthing arrangement
for combined protective and
functional purpose
E.g. IT SUITES
Presence of adequate
arrangements for alternative
sources, where applicable
Non conducting location **
None of the in
may be marke
-
8/3/2019 Visual Inspection - Interactive Guide
7/26
RETURN
RETURN
RETURN
RETURN
RETURN Segregation of safety circuits Fire alarm and
other circuits
importance of
breakdown of
caused by a fa
Electromagne
another circui
resulting from
conduit, ducts
Iden
P f di i i Th
Addition
Addition prot
points or circu
are intended f
current ratinginstallations a
Some of the l
in section 7 of
bonding may
411.3.1.2 of B
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.
Presence of supplementary
bonding conductors
It should be v
occurred, are
any part of th
Segregation o
Where every c
separate cont
separate com
separation.
The requirement for supplementary equipotential
bonding is generally applicable only to installationsand locations where there is an increased risk of
electric shock.
Prevention of mutu
Proximity of non-electrical services
& other influences
Segregation of Band I & Band II
circuits or Band II Insulation usedBand 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.
-
8/3/2019 Visual Inspection - Interactive Guide
8/26
RETURN
RETURN Identification of conductors
RETURN
RETURN Erection Methods
RETURN
RETURN
protective con
supply (Regul
Labelling of protective devices,
switches and terminals
The inspector
protective de
necessary). Lacircuit breake
1) It is arrange
recognised, a
rated current i
The correct idconductors, in
This is in addit
connection re
exceptions* (
identified by c
must be identi
Cables concea
50mm or less
appropriate st
they are cable
zones.
If a cable cann
conduit or SW
The sizes and
trunking syste
information t
the designer. I
available to th
Cables a
Selection of conductors for current
carrying capacity and voltage drop
Note: Particular attention should be given to
cables in contact with thermally insulating
material.
Adequate inspinstallation is
Compliance w
considered at
all equipment
equivalent, ar
defective so aRouting of cables in prescribed
zones
Cables incorporating earthed
armour or sheath or run in an
-
8/3/2019 Visual Inspection - Interactive Guide
9/26
RETURN
RETURN
RETURN
RETURN
RETURN
RETURN
G
Presence and correct location of
appropriate devices for isolationand switching
Correct connection of accessories
and equipment
The inspector
equipment ar
well made bot
where possibl
Presence of under-voltageprotective devices
The inspectordevices which
of a significan
They are foun
motors. They
automatic con
inspector sho
design require
Particular protective measures for
special installations and locations
The special in
the risks assoc
or minimal clo
other risks, su
and installatio
measures ass
shower etc.Connection of single pole devices
for protection or switching in line
conductors only
This is a visual
are connected
breaker, fuse,
the like shoul
made in additi
conducted lat
Adequacy of access to switchgear
and other equipment
It must be con
have been aff
inspection, te
Isolation and
namely isolatiand functional
purposes of in
however, that
provided that
requirements
-
8/3/2019 Visual Inspection - Interactive Guide
10/26
-
8/3/2019 Visual Inspection - Interactive Guide
11/26
-
8/3/2019 Visual Inspection - Interactive Guide
12/26
-
8/3/2019 Visual Inspection - Interactive Guide
13/26
-
8/3/2019 Visual Inspection - Interactive Guide
14/26
eneral
-
8/3/2019 Visual Inspection - Interactive Guide
15/26
RETURN
RETURN
RETURN
RETURN
PELV
Visual inspection - Definitions table - CLICK HE
SELV
Double or Reinforced Insulation
Insulation of live parts
-
8/3/2019 Visual Inspection - Interactive Guide
16/26
RETURN
RETURN Placing out of reach **
Obstacles **
-
8/3/2019 Visual Inspection - Interactive Guide
17/26
RETURN
RETURN
RETURN
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.
Other examples of extraneous conductive parts include:
1, Central heating and air conditioning systems2, 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)
Presence of main protective bonding conductors
FELV
Choice of setting of protective and monitoring devices (for fault
-
8/3/2019 Visual Inspection - Interactive Guide
18/26
RETURN
RETURN
RETURN
RETURN
Segregation of Band I and Band II circuits or band II insulation us
Identification of conductors
Presence of danger notices and other warning notices - EXAMPL
Labelling of protective devices, switches and terminals - EXAMP
-
8/3/2019 Visual Inspection - Interactive Guide
19/26
RETURN
RETURN
RETURN
Erection Methods
Routing of cables in prescribed zones
-
8/3/2019 Visual Inspection - Interactive Guide
20/26
RETURN Routing of cables in prescribed zones
-
8/3/2019 Visual Inspection - Interactive Guide
21/26
-
8/3/2019 Visual Inspection - Interactive Guide
22/26
-
8/3/2019 Visual Inspection - Interactive Guide
23/26
-
8/3/2019 Visual Inspection - Interactive Guide
24/26
-
8/3/2019 Visual Inspection - Interactive Guide
25/26
-
8/3/2019 Visual Inspection - Interactive Guide
26/26