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MK dual MCB trip issue with 6amp light circuit

Postby Boris88 » Tue Jun 08, 2021 8:19 pm

Hi all,

Hoping someone can point me in the right direction.

Over the past few days my MK dual RCD split board has been tripping the 6amp lighting circuit. Unfortunately, all the lighting is on the one so can’t tell wether it’s ground or first floor.

The strange part is that when I reinstate the mcb, all lights work, switch on and off multiple times but after about 3-5 minutes the mcb trips. I have investigated every light and can’t find an issue.

After resetting the trip several times over the past few days, occasionally it will trip the RCD however, the issue seems to be with the mcb side as when I leave it off the RCD is fine for days.

I have checked connections etc now struggling to determine what is could be.

Any help would be much appreciated.

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Simply Build It

Postby Mr White » Tue Jun 08, 2021 10:06 pm

There is no "magical fix" if you have checked everything as best you can, and find nothing wrong, then it is time to call an electrician who will have specialist test equipment.
Mr White
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Postby ericmark » Tue Jun 08, 2021 10:45 pm

Any outside lights with water in them?
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