October 2013
Intermediate to advanced
192 pages
8h 30m
English
Content preview from Electric Wiring, 3rd Edition
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156 Safe and efficient earthing
Fig. 10.9 shows the bonding connection which should be made between the
electric fire and towel rail earth terminals and other exposed metalwork,
including the bath, hot and cold waterpipes and waste pipe.
Size of bonding conductor
The sizes for bonding conductors are specified in IEE Regulations Section
547.
Methods of protection from shock
One of the following basic systems may be used to protect users of electrical
apparatus from shock or fire:
1 Direct or solid earthing of the apparatus.
2 Protective multiple earthing.
3 Omission of an earth entirely by using an all-insulated wiring system
and electric appliance ...
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