Pendant rose LIGhT SWITCH advice

[Stef11]

Hi

I am struggling with one light. It's an old house we have just moved into using cartridge fuse box but 1 fuse for downstairs. I know it's working as other lights are. Anyway, in the front room there was no ceiling light but the wires are there.

In the ceiling there are 3 wires all with 1 green, red and black. I have found the old colours circuit and attached the pendant in the same way as other wor,king room. Admittedly I can't tell which one is the switch cable but I have tried all 3 and am sure which ( 1 blew fuse with one and it lights dimly via the hall switch with the other ) but even with elimination my problem seems to be the light switch as I can't get any light from this switch.

The problem stems from the fact that the light switch cable has different wires to the ceiling cable! Maybe it's joined above with a different cable but anyway the light switch cable has 4 wires- one green earth fine- but it also has 2 reds and 1 blue and I don't know how to put these in 1 way switch which has 1 TOP and 1 common hole OR my new switch which has L1 L2 and a common. I suspect I twist the 2 reds together in 1 hole but can anyone please help!

Many thanks

 

[PrenticeBoyofDerry]

Ideally you require some approved test equipment to, I help determine what you have. There are few differing ways/methods to wire lighting circuits, not all installers fit them the same and not all fit them correctly.
I could only guess your set up, but with the addition of the blue core at the switch seems there may have been a little alteration or remedial work done to the circuit. I assume this is a one way switching function with no others switch operating the light.

So we have two reds and a blue at switch: Did you not note how this where terminated at the old switch?
I would hazard a guess that the reds are loop-in permanent live and would be terminated at the common terminal the blue would be your switch live.
I would then suspect at the light fitting all the reds would be connected together, this is when you could do with a continuity tester and a voltage indicator as you could then test to see if one of the blacks, when tested open and closes the circuit when switched, this would require a little work on the conductors at the fuse board or you could test for voltage at the switch and the light fitting.

 

[Stef11]

Ideally you require some approved test equipment to, I help determine what you have. There are few differing ways/methods to wire lighting circuits, not all installers fit them the same and not all fit them correctly.
I could only guess your set up, but with the addition of the blue core at the switch seems there may have been a little alteration or remedial work done to the circuit. I assume this is a one way switching function with no others switch operating the light.

So we have two reds and a blue at switch: Did you not note how this where terminated at the old switch?
I would hazard a guess that the reds are loop-in permanent live and would be terminated at the common terminal the blue would be your switch live.
I would then suspect at the light fitting all the reds would be connected together, this is when you could do with a continuity tester and a voltage indicator as you could then test to see if one of the blacks, when tested open and closes the circuit when switched, this would require a little work on the conductors at the fuse board or you could test for voltage at the switch and the light fitting.

Thanks fella. The problem was that there was no ceiling pendant light installed. It was just capped with the ceiling cables tied ans capped. At the switch I do recall that the 2 reds were twisted together. So what u are saying is that the reds should both go in the common hole and the blue the switched live in the TOP..I am sure I have already but I will try this. Ta