New Sockets

MylesMelia · 24 Feb 2020

I’ve recently fitted new sockets for the downstairs living room and all of the new sockets have USB charging.

All sockets was working fine without a problem this morning and a day ago.

New carpet is being fitted and one of the fitters plugged in his jigsaw into the downstairs socket (new one) and his angle grinder into the hallway socket which hasn’t been touched at all.

The MCB keeps tripping off when turned back on straight away with everything unplugged downstairs, upstairs sockets are fine because it’s on a different MCB

Could it be one of the wires have slipped out of the living room socket when he unplugged his jigsaw?

B32 MCB with a RCD to the right

stem · 24 Feb 2020

Personally I would think it more likely that the fitters have damaged a hidden cable with the jigsaw, angle grinder, or put a nail though it.

If you have fitted the new sockets, it shouldn't be too much of a job for you to open them up and check, to see if there is something amiss inside such as a trapped or damaged wire.

chivers67 · 24 Feb 2020

Have you a multimeter? How confident are you fault finding? Is it just an MCB tripping of an RCD/RCBO?

ETAF · 24 Feb 2020

New carpet is being fitted and one of the fitters plugged in his jigsaw into the downstairs socket (new one) and his angle grinder into the hallway socket which hasn’t been touched at all.

just out of interest, why a grinder & jigsaw to just lay a carpet ?
what else did they do

we had new sockets and also had the wall replastered, when they screwed the socket back into the box, they caught the cable on the screw and every now and then the trip went ,
I just applied the what has changed recently , and remembered they loosened all sockets
very easy to spot

MylesMelia · 24 Feb 2020

eta said:
just out of interest, why a grinder & jigsaw to just lay a carpet ?
what else did they do

we had new sockets and also had the wall replastered, when they screwed the socket back into the box, they caught the cable on the screw and every now and then the trip went ,
I just applied the what has changed recently , and remembered they loosened all sockets
very easy to spot

They had to cut the skirting board just a few millimetres for the carpet to push under.

chivers67 said:
Have you a multimeter? How confident are you fault finding? Is it just an MCB tripping of an RCD/RCBO?

It was just the MCB, the RCD would stay on. I’d turn the RCD off, flick the downstairs sockets MCB up and turn the RCD back on and the MCB would trip straight away

I’ve sorted it anyway guys the moment they was done, unscrewed the socket and he must’ve yanked abit to hard on the plug socket when he unplugged his jigsaw and the neutral had come out and was touching the back of the plastic casing. All is done now thanks for the help guys

bantamsilver · 24 Feb 2020

So basically it was your fault. You obviously didn't tighten the neutral, it popped out, touched the non conductive plastic case and it tripped with no load.!

MylesMelia · 24 Feb 2020

bantamsilver said:
So basically it was your fault. You obviously didn't tighten the neutral, it popped out, touched the non conductive plastic case and it tripped with no load.!

It was tightened but he had issues pulling it out because they’re new and he yanked it out but yes pretty much my fault

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