Emergency lighting circuit

[C&GStudent]

Greetings all.

All was asked to do a favour for my dad today and have a look at a breaker that keeps tripping in his snooker club. Its a 5A with 2 cores in it. 1 supplying a wall light circuit in snooker room and 1 an emergency lighting circuit with 3 fittings on.

It's the emergency lights that are tripping it. It goes T+E to non-maintained - non-maintained - maintained emergency exit sign. At the exit sign there is a single live + E going somewhere?

I can't figure out what this is as i thought is was supplied direct from the breaker in case of a fault on the cicuit. It wouldn't link to another circuit would it? I thought this would be dangerous?

I told them to call an electrician, but i'm disappointed i couldn't figure it out. Can someone shed some light?

 

[breezer]

First, never "do favours" for any one, it will always turn nasty in some shape or form.

2nd

god knows what the other cable is for, and you are right it should not link to another cct

 

[Belle427]

does the exit sign stay on all the time,or is it switched with the hall lighting circuit?

 

[C&GStudent]

First, never "do favours" for any one, it will always turn nasty in some shape or form.

That comment sent a shudder down my spine!


I've never seen the sign in action, I think it stays on all the time.

 

[breezer]

sorry, but its true

 

[Lectrician]

nOT SUPPLYING A LIGHT EXTERNAL TO THE EXIT IS IT?

 

[ricicle]

Say that again Lectrician I didn't quite here

 

[C&GStudent]

nOT SUPPLYING A LIGHT EXTERNAL TO THE EXIT IS IT?

Its only a 1 core + E, phase and cpc, a light would require a neutral..... wouldn't it?

 

[ricicle]

If they've used singles they could have picked up a neutral from somewhere else? (hopefully on the same circuit )

 

[RF Lighting]

The single live, what is it connected to at the exit sign?

Is it connected to the same terminal as the live from the T&E or does it go to a seperate terminal on the fitting?

I would guess that it is a switched live from the local lighting circuit or perhaps another switch somewhere to switch it into maintained mode.

 

[Pensdown]

First, never "do favours" for any one, it will always turn nasty in some shape or form.

..but you can dine out on the stories for years......

 

[C&GStudent]

The single live, what is it connected to at the exit sign?

Is it connected to the same terminal as the live from the T&E or does it go to a seperate terminal on the fitting?

It goes form the same terminal. There are only 3, P, N and E.

I'm really confused. I will go back tomorrow and hunt it down or it'll torment me!