Font size
WorksheetsInspection and Testing
Total questions: 25
Worksheet time: 13mins
The purpose of initial verification is
to give the customer a certificate
to verify the installation is safe to use
to check the circuits work
to show competence
The recommended maximum value for Main Earth Bonding is
0.15 Ω
0.5 Ω
0.05 Ω
5 Ω
Single pole switches must be connected in the ? conductor?
(a)
Which sense can be used to locate a sharp trunking corner?
Taste
Smell
Touch
Sight
When inspecting accessories it is important that
the CPC is appropriately identified
the screw heads are lined up
there is a minimum of cable inside
there is copper showing
In the UK electrical sockets and switches should be mounted
where the client wants them
where the sun sets at the Winter equinox
in accessible areas
as suggested by Appendix H OSG
Insulation resistance should be performed with
an insulation resistance tester
a Fluke
a Megger
a multi-function tester
The minimum I.R value per circuit is
2M Ω
1M Ω
<1000M Ω
<500M Ω
The minimum I.R value per DB is
1M Ω
2M Ω
<1000M Ω
<500M Ω
The Ingress Protection requirements for DB's are
IP Freely/IP Long
IPXX/IPXXX
IP4X/IP2X
IP44/IP65
The continuity of protective and line conductors can also be termed as
r1 + rn
R1+RN
R2
R1+R2
Which of the following can be classed as an Emergency Switch
BSEN60898 MCB
Plug and Socket outlet
Unswitched Fuse Connection Unit
Device with Semi Conductor
To confirm the values of (R1+R2) are appropriate you could
check them with a similar circuit
reference them with table I1 in OSG
reference them with table A2 in OSG
turn on the supply
When carrying out safe isolation it is important to
liaise with the client to work at a convenient time
use tools less than 6 months old
isolate the electricity as soon as possible
only use a toughened steel lock
An appropriate tool to ensure safe isolation is
a Volt Stick
a lubricated finger
a GS38 Approved Voltage Indicator
a GS test lamp
A new circuit in a property would require a
Minor Electrical Works Certificate
Electrical Condition Report
Periodic Inspection and Test
Electrical Installation Certificate
Zs is equal to
(R1+R2)
(R1+CPC)+Ze
r1+r2+Ze
(R1+R2) + Ze
Functional Testing can be completed by
switching equipment on
a trained person
the client
checking the "neons" light up
Voltage, Frequency, IPF, Ze can be grouped as
Herbivores
a 70's Progressive Rock quartet
Earthing Arrangements
Nature of Supply Parameters
A suitable method of confirming polarity is by
switching it on
visual inspection
magnetism
checking the light comes on
RCD's should be tested at
x1
x1/2
x5
x1/2
x5
x0
x1
x5
x6
x2
r1, rn, r2 are measured during a
Zs test
Test method 2
Ring Final Test
I.R Test
PFC (Ipf) is measured in
Amps
Volts
Mega-Amps
Kilo-Amps
The value (in Ohms) at which an Earth Electrode is deemed "unstable" is around
200
300
40
0.35
The Green and yellow cable that connects the DNO to the installation is the
Earth
CPC
Main Bond
Supplementary Bond
