(3) Emergency systems shall have adequate capacity and rating. for the
emergency operation of all equipment connected to the system including
the simultaneous operation of all fire lifts and one other lift.
(4) All wiring for emergency systems shall be in metal conduit or of fire
resisting mineral insulated cables, laid along areas of least fire risk.
(5) Current supply shall be such that in the event of failure of the normal
supply to or within the building or group of buildings concerned, the
emergency lighting or emergency power, or both emergency lighting and
power will be available within 10 seconds of the interruption of the normal
supply.
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