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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FOUR
Control
Definitions used in this chapter
Emergency switching Rapid cutting off of electrical energy to
remove any hazard to persons, livestock or property which may
occur unexpectedly.
Isolation Cutting off an electrical installation, a circuit, or an
item of equipment from every source of electrical energy.
Mechanical maintenance The replacement, refurbishment or
cleaning of lamps and non-electrical parts of equipment, plant
and machinery.
Switch A mechanical switching device capable of making, carry-
ing and breaking current under normal circuit conditions, which
may include specified overload conditions, and also of carrying
for a specifie ...
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