Bonding question

A friend of mine wants to bring the electrics on a property of his up to scratch, and also get some storage heaters fitted, and got the local supplier in to give him a quote - as he lives some miles away I agreed to have the key and let them in. I was surprised by one or two things that they said about his electrics, and by the quote, so I'd be grateful for the views of more knowledgeable people here. The property has just had a new kitchen fitted by a specialist company and they, as would be expected, supplementary bonded the incoming water pipes and also the sink top and draining board - using 6mm cable to do it. The suppliers electrician said that they shouldn't have bonded the draining board, which seemed pretty strange to me. Also, as I noticed that the property is PME protected, I thought that all the bonding should be 10mm - he said that 6mm was ok. The existing consumer unit is the wired fuse type which my friend wants replaced so that the property benefits from RCD protection - as he wants to let the place. I was surprised when the Board's electrician said that, although it was a good idea to replace the CU, it wasn't absolutely necessary. As for the quote: for 3 storage heaters - 12, 18 and 24 - replacing the consumer unit and fitting a second (3 ways) for the Economy 7 supply and tidying up the bonding in the bathroom and kitchen, £2,617 - which I thought was very steep. Any comments?

Reply to
Barney
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What is bonding?

Reply to
Stickems.

Many things, I suppose, but in this case I meant earth bonding!

Reply to
Barney

IEE OSG page 26. "There is no specific requirement to bond kitchen pipe, sinks or draining boards."

Even if there was a requirement 4mm would probably be OK as used in a bathroom.

Also, as I noticed that the

The main incoming water service should be main bonded back to the CU. This usually requires 10mm cable .

For a PME system then only sockets likely to power portable outdoor appliances need to be protected by an RCD.

Shop around.

Adam

Reply to
ARWadsworth

Thanks Adam, your help is appreciated. One more question, if you don't mind, in your experience are Economy 7 meters usually fitted free by the supply companies?

Reply to
Barney

I have no idea. Try a search on

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It may help.

Adam

Reply to
ARWadsworth

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