Isolation and switching
Where necessary to prevent danger, all systems
and installations must be provided with suitable means for:
- cutting off of the supply of electrical energy to electrical equipment, and
- isolation of the electrical equipment.
Power supplies to test benches and workshop equipment must be controlled via a master switch which is both clearly identifiable and easily accessible at all times. Power to lighting for the area must not be controlled from this same switch.
Where un-interruptible power
supply (UPS) systems feed workshop supplies:
- these must have an accessible and identifiable means of isolation for all of the sockets served which must be separate from that for any other distribution systems present
- which are 'stand alone' supplies, these must have an accessible and identifiable output switch.
Where there is more than one distributed feed
from a UPS, each feed should be provided with an accessible and
clearly identifiable isolator and the distribution sockets should
be labelled as to which feed they are attached.
Isolation and Switching
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