RCD tripping on lighting

[Square271]

Hi, whenever I use my landing socket for my upstairs light the main RCD trips out. The 6a MCB does not trip. IF I turn this light off I can use the lighting. Just wondered what could suddenly be the fault? The switch, light, MCB or RCD or the wiring which is very old. Thanks

 

[Chri5]

Hi, whenever I use my landing socket (do you mean switch) for my upstairs light the main RCD trips out. The 6a MCB does not trip. IF I turn this light off I can use the lighting. Just wondered what could suddenly be the fault? The switch, light, MCB or RCD or the wiring which is very old. Thanks

Has it ever worked? As in has the fault been there since you got someone in to update the cu to an rcd based system?

Do you have more than one lights circuit, as in more than one lighting mcb at the cu?[/b]

 

[Square271]

apologies I meant switch. Yes it has been working fine. The switch is a 2 way and the light can be turned on from either upstairs or downstairs. Thanks

 

[ban-all-sheds]

And there have been absolutely no changes made to any wiring, lights or switches?

Any work which involves drilling or cutting into walls, floors or ceilings?

Anybody been into the loft?

 

[Square271]

no nothing. went to bed all was working fine then this happened. Any ideas??? or were should I start replacing things??

 

[ban-all-sheds]

The switch is a 2 way and the light can be turned on from either upstairs or downstairs. Thanks

What happens when you turn it on from downstairs?

Turn the power off & check for loose cables at the switches and the lights.

 

[EFLImpudence]

Take out the bulb. ?

 

[Square271]

have tightened the connections and removed the blub problem rectified, thanks for the advice!!!!!

 

[ban-all-sheds]

What happens when you put the bulb back in?

 

[Square271]

installed a new bulb and works fine, thanks