8.3.2 - Correct testing sequence
Some tests will be carried out before the
supply is connected, whilst others cannot be performed until
the installation is energised. {Table 8.5} shows the correct
sequence of testing to reduce the possibility of accidents
to the minimum.
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Table 8.5 - Correct sequence
for safe testing
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BEFORE CONNECTION OF THE SUPPLY
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1
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Continuity of protective
conductors |
|
2
|
Main and supplementary
bonding continuity |
|
3
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Continuity of ring final
circuit conductors |
|
4
|
Insulation resistance |
|
5
|
Site applied insulation |
|
6
|
Protection by separation |
|
7
|
Protection by barriers
and enclosures |
|
8
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Insulation of non-conducting
floors and walls |
|
9
|
Polarity |
|
10
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Earth electrode resistance
if an earth electrode resistance tester is used |
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WITH THE SUPPLY CONNECTED
|
|
11
|
Earth electrode resistance
if an earth-fault loop tester or the ammeter and voltmeter
method are used |
|
12
|
Confirm correct polarity |
|
13
|
Earth-fault loop impedance |
|
14
|
Correct operation of
residual current devices |
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15
|
Correct operation of
switches and isolators |
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