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 Post subject: Isolated socket
PostPosted: Sat Aug 25, 2018 8:55 am 
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Hi UHM. Newbie member here and first post. :hello2:

I recently moved into a new (to me) house and found a socket not working. I've looked into it and found it isolated from the main at the next socket on the main (wires removed and wrapped in tape). I suspect the previous owners did this as they had this room as a nursery but can't confirm at the moment.

Looking into the actual socket in question though I found some damaged insulation on the live and a slight blackening on the back of the socket. I've wrapped the live in insulation and put the socket back (but left it isolated at the other socket).

Would it be foolish to just link this socket back to the ring main?

Thanks for any help, I'd really like to get this socket working. :help:


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 Post subject: Re: Isolated socket
PostPosted: Sat Aug 25, 2018 9:56 am 
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:welcomeuhm:

I take it that there is only one cable at the isolated socket. How many cables are there at the other socket.


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 Post subject: Re: Isolated socket
PostPosted: Sat Aug 25, 2018 11:12 am 
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Thanks for the reply. There are two cables in each socket but with only one connected in the upstream socket, the other taped off and hanging.


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 Post subject: Re: Isolated socket
PostPosted: Sun Aug 26, 2018 9:07 am 
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Odd that there is a cable still connected into the non working socket. Anything else in the house not working,


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 Post subject: Re: Isolated socket
PostPosted: Sun Aug 26, 2018 4:12 pm 
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Not found anything else not working in the house just this socket.

Is this just a shoddy way of isolating the socket? Has this just turned my upstairs ring to a long radial and will this cause any issues and need correcting regardless? :scratch:


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 Post subject: Re: Isolated socket
PostPosted: Mon Aug 27, 2018 9:02 am 
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Sorry for the delay. I'm am on call this weekend and I got a call out.

It does sound like that the ring has been turned into two radials. It is going to need further investigation.

By right if it was a ring then the isolated socket should still have power at it is still connected at the other side of the ring.

What size MCB/fuse do you have? Any RCD protection?

A photo of the damaged insulation and the burn marks on the socket would be helpful.

If it was my house I would be doing a full wiring diagram of the topology of the ring, checking all terminals at every socket
(and that is not a bad thing to do after 10 years) to see what I could find. It will take you some time if there are a lot of sockets on the MCB.

I suspect that the socket being disconnected as it was a nursery is possibly a red herring. I think it is far more likely that there is a loose connection somewhere else on the ring.


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 Post subject: Re: Isolated socket
PostPosted: Mon Aug 27, 2018 9:12 am 
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(Possible somebody has drilled through the linking cable somewhere and isolated at the first socket to make safe? Cable needs testing for continuity..... IKN, sorry OnlyMe.)


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 Post subject: Re: Isolated socket
PostPosted: Mon Aug 27, 2018 9:23 am 
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The possibility of a damaged or loose cable elsewhere in the circuit is high.


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 Post subject: Re: Isolated socket
PostPosted: Mon Aug 27, 2018 10:04 am 
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I have a problem in my old house, waiting for rooms to be emptied to get at cables, in mean time the 32A MCB has been swapped for a 20A MCB and all house is RCD protected.

My problem is access to the room where the likely fault is, so down to wife to remove her stuff, once freezers are empty I will switch off power. Some how there have been two faults, and I have been naughty and not done an EICR every 10 years as recommended. You should also have an EICR on change of occupant, this should high light any problems, we are selling one house at the moment, we know my late father-in-law who was an electrician has done work in the house, and there are likely faults. He wired my extension and ran wires outside the permitted zones, so suspect he has done same with his house, however no one has asked for an EICR only question was if any work done since 2004, with a full rewire at £4k it is now really something I would worry about before buying, however you do need to know of any faults before using power hungry equipment like washing machine, tumble drier, and dishwasher.


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