January 2016
Intermediate to advanced
110 pages
3h 30m
English
Content preview from The IEE Wiring Regulations Explained and Illustrated, 2nd Edition
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Testing
and
inspection
4 If the ring is continuous with no interconnections, all sockets
will give the same reading. Spurs give a higher reading.
5 Should an interconnection exist, sockets beyond that intercon-
nection will show a significantly different value. Hence the fault
can be located without the systematic removal of all the socket
fronts which would be needed with other methods of testing.
Earth electrode resistance
We have already discussed in Chapter
2
the effect of the resistance
of an earth electrode. When it forms part of the earth fault loop
path its resistance value will need to be measured.
The method used is simply based o
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