Can 2 separate circuits be used on an emergency light,?

[Gregorytweed]

Can 2 separate circuits be used for an emergency light, one for the switch leg and the other for the constant power for the battery, or does it have to be the same circuit?

 

[westward10]

In the UK this is not something normally done as you are going to end up with interconnected neutrals.

 

[Pete999]

look up the descript-ion of a CIRCUIT

 

[Gregorytweed]

In the UK this is not something normally done as you are going to end up with interconnected neutrals.

What if the 2 circuits are sharing a neutral to the panel? One is constant hot and the other is switch leg( A phase and B phase)

 

[westward10]

What if the 2 circuits are sharing a neutral to the panel? One is constant hot and the other is switch leg( A phase and B phase)

That is something I cannot comment on. @Megawatt who is a US member may be more informed.

 

[bill01803]

Won't work in the UK in a house as lighting circuits are required to be RCD protected

 

[westward10]

Won't work in the UK in a house as lighting circuits are required to be RCD protected

I doubt it is a house.

 

[Megawatt]

Can 2 separate circuits be used for an emergency light, one for the switch leg and the other for the constant power for the battery, or does it have to be the same circuit?

It needs to be the same circuit and please don’t share neutrals

 

[Clark the spark]

Can 2 separate circuits be used for an emergency light, one for the switch leg and the other for the constant power for the battery, or does it have to be the same circuit?

This is against the principal of emergency lighting. It is to protect the circuit it serves. Therefore it must be supplied by the same origin.