In which case both the live and neutral can be disconnected at the switch – after making them safe with connectors etc – the power can be switched on and it will show if the fault is before or after the switch by the RCD tripping or not.
RCD tripping on a light circuit
- Thread starter kippyken88
- Start date
Ok, disconnected and made safe, power on and still trips. I assume this points to the cable between the switch and breaker being the issue?
If you separate (safely) the 3 browns and 3 blues it still trips?
The OP is calling it an RCD which is tripping, but he perhaps may not know the difference - it could be an RCD, MCB, or RCBO. Could the OP help us out with a photo, of the item which is tripping?
Evening Gentlemen,
Apologies if I may have caused any confusion. Below is the panel in question. Note the labelling is misaligned and needs to move 1 to the left, I believe 'lights #4' is the circuit with the issue not 'Bath lights'.
When that breaker is closed, the breaker labelled RCD with the yellow button trips.
Apologies if I may have caused any confusion. Below is the panel in question. Note the labelling is misaligned and needs to move 1 to the left, I believe 'lights #4' is the circuit with the issue not 'Bath lights'.
When that breaker is closed, the breaker labelled RCD with the yellow button trips.
I am confused by this one. The switch only has 1 brown and one blue. picture below. the other is a separate two way circuit.
Attachments
Useful information above.
Have you heard or seen and mice or rats?
Have you heard or seen and mice or rats?
no, but we are in a basement with a large communal garden behind and I think a void under the floor which increases towards the rear, so I think it is safe to assume they are about, rats that is. You suspect rodent damage under the floor between switch and breaker?
Sorry I thought sunrays picture was your switch
No problem and thanks for your input.
I think you are probably right though on getting some one in!
No problem and thanks for your input.
In hindsight I probably should have added pictures on the original post!
Did you try splitting the circuit half way?No problem and thanks for your input.
Not sure what you mean. Only thing I have done physically with the cabling is disconnect at the light switch. Is that classed as splitting the circuit?
I think I am correct, that those Wylex MCB's, only isolate the live, in which case, if the RCD trips, only when that MCB is turned on, irrespective of whether the light switch for the circuit is on, or off - that suggest to me, there is leakage between L and E, before the switch.
For the OP - As a final check, if you locate and isolate the L, which feeds to switch for the six lights, safely isolate it with a connector, switch back on and the RCD still trips - It suggests the fault is on the cable between the consumer unit, and the switch.
If the cable goes up, to the ceiling, before making it's way across to the switch, then the chances are, that a floor nail or similar has damaged the cable.
For the OP - As a final check, if you locate and isolate the L, which feeds to switch for the six lights, safely isolate it with a connector, switch back on and the RCD still trips - It suggests the fault is on the cable between the consumer unit, and the switch.
If the cable goes up, to the ceiling, before making it's way across to the switch, then the chances are, that a floor nail or similar has damaged the cable.
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