Switching off

Switching off

The IET Wiring Regulations, BS 7671 (17th Edition) includes a range of requirements for isolation and switching, including isolation, switching off for mechanical maintenance, emergency switching and functional switching.
Graham Wretham considers, in particular, the requirements for ‘switching off for mechanical maintenance’.
Switching off for mechanical maintenance, as defined, is the replacement, refurbishment or cleaning of lamps and non-electrical parts of equipment, plant and machinery.
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