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PostPosted: Tue May 22, 2018 2:36 pm 
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I have a separate fuse box in a workshop away from the house, the box, all the wiring and sockets etc were installed by an extremely competent electrician a few years back. During the past 6 months the socket breaker has tripped a few times. I've never been able to find a problem and its always happily returned to the 'on' position. This morning it again tripped, but despite removing all plugs from the sockets it still trips every time the power is switched on. I can't believe that there is a problem with the wiring, could it be the circuit breaker itself?

It is a: Merlin Gerin multi 9 C6OH RCB0 30mA C32 R30 26861


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PostPosted: Tue May 22, 2018 5:41 pm 
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So with nothing connected in the workshop it still trips?

Has any works been carried out recently anywhere?

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PostPosted: Tue May 22, 2018 5:48 pm 
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Hi,
Nothing at all switched on, or even plugged in, and no work done at all except when the British Gas chap serviced the boiler in the house a few months back, but that is on a different fuse box.
The lights work OK, its only the sockets breaker that is tripping.


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PostPosted: Tue May 22, 2018 5:49 pm 
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They can weaken over time, particularly when they get tripped regularly.

If tripping with nothing connected then it can only be a wiring fault, whether that be water ingress/condensation/ rodent damage etc or say an unsleeved earth at a socket.

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PostPosted: Tue May 22, 2018 5:50 pm 
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There must be a fault on that circuit then.

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PostPosted: Tue May 22, 2018 5:59 pm 
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Everyone has missed the obvious.

1) The correct term is circuit breaker, not socket breaker

2) You have not got ordinary circuit breakers, you have got RCBO's


An RCBO is cross between a circuit breaker and a RCD. One trips if too much current is drawn the other trips if there is current leaking to earth.

I suspect you have an earth fault.

Is any thing damp or wet? (switch the power off and open the sockets and have a look.

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Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

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PostPosted: Tue May 22, 2018 6:24 pm 
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Many thanks, I'll take a look at all the sockets tomorrow.
I don't think that damp is a problem ... rodent damage I can't even guess at, I'd have to check behind all the plaster board to see if that is a problem.
If everything seems OK, then might it be the RCBO?


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PostPosted: Tue May 22, 2018 6:27 pm 
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No, the rcbo is doing its job, you have to find the cause of the problem.

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Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

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