Just been to change a CU | Page 2 | on ElectriciansForums

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dandb

I wish I would have taken my camera (I do not have an I phone :))

Anyway went to change a customers CU. All looked ok and quite a straight forward swap. Twin and earth cabling and docs to show rewired 20 years ago.

Anyway I could not have been so wrong.

Took the front cover off to find a whole load of issues.

1st - 16mm earth cable coming from supplier joint (TNS) is going into the main switch N terminal.
2nd - 25mm incoming Neutal is going into a terminal block connecting to a black 2.5mm single cable.
3rd - 2.5mm red cable connected to the Live main switch terminal along side the 25mm live cable.

Hmmmm I thought....managed to chase the 2.5mm cable to a switch on the other side of the wall. I asked the customer about this switch and she said.

'oh yeah thats an interesting question. That switch bypasses the meter but we never use it. I thought it had been disconnected!!!!'

Well well well.

Apparently the customer bought the house a couple of years back and once she did the previous occupant came back to ask for a tree out of the garden that was a wedding anniversary gift. At that time he told her about the switch.


Shoudl I tell the DNO or not? Customer has said she never used it and I have now ripped it out as to install the new CU.

Anyone else come across anything like this?
 

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