Trumpy,
within the building/environmental codes and the local fire officer,
emergency lighting must be fed via the local lighting circuit, not on it own MCB.
if the lighting fails within an area the emergency lighting must be available for egress from that part of the property.
scenario;
power fails to general (local) lighting in the main bar area, emergency lighting is emergised via its own back up batteries, (for Single Point Units only.
if the feeder for the emergency lighting is fed from another breaker it will still be energised and not running on its own batteries.
but thinking on this;
if the fittings are Maintained, IE, lamps lit at all material times, then that would probably be ok.
but with the cost of a Non Maintained fitting being about £14.00 and the cost of a MAintained fitting being about £21.00 most of the clients that i know would go for a Non Maintained fitting all the time, Due to them being tight.!
i personallay prefer MAintained fittings every were, due to the fact if the lamp aint lit its usualy faulty!!
Emergency lighting facts: supply on.
Non Maintained, lamp off battery charging
Maintained, lamp on battery charging
supply off
Non Maintained, lamp on
Maintained, lamp on
this is for single point units only.
Central Battery Systems are totaly different!!
Britspark
