October 2013
Intermediate to advanced
192 pages
8h 30m
English
Content preview from Electric Wiring, 3rd Edition
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Safe and efficient earthing
1
51
separate protective conductor run inside the conduit connected at the
consuming end to the metal casing of the appliance, or the earth terminal of a
socket-outlet.
In addition to the metalwork of electrical equipment or cables as indicated
above, it is necessary to connect to the main earthing terminal any metallic
main water or gas pipes and any other service pipes or ducting which enter the
building; also any risers or ducts for central heating or air-conditioning
systems and any exposed metallic parts of the building structure — IEE
Regulation 413-02-02.
The bonding connections to main water or gas pipes
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