October 2013
Intermediate to advanced
192 pages
8h 30m
English
Content preview from Electric Wiring, 3rd Edition
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66 Wiring socket-outlets and portable appliances
Each ring circuit must be terminated at its own 30 A fuse or MCB, and the
socket-outlets and fixed appliances should be reasonably distributed among
the rings.
Spurs may be connected to ring circuits. The total number of spurs is
unlimited but the number of non-fused spurs must not exceed the total
number of socket-outlets and fixed appliances connected directly in the ring.
A non-fused spur must be connected either at the terminals of a socket-outlet,
at a joint box, or at the origin of the ring in the consumer unit. It must have a
current rating not less than that of the conductors forming
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