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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Electrical Questions >> Where should main bonding be to? https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1161781973 Message started by SimonF on Oct 25^th, 2006, 2:12pm

Title: Where should main bonding be to?
Post by SimonF on Oct 25^th, 2006, 2:12pm

First - thanks for all the constructive comments I've got from my
last two questions. I'm still going through the PIR on my house
working out what needs to be done....

Main bonding on Gas/Water - where should it be to?

In my house at the moment , On the water there's a pretty solid
green/yellow wire going from under the kitchen sink back to a
(i think its called Henley?) block by the electricity meter, and from there
onto the sheath of the incoming mains cable.

But the gas has a much thinner wire, and rather than going to the
electricity meter's cupboard, it goes back to the consumer unit.

The gas one is too small anyway (2.5mm I'd guess), and not within
the 600mm of the gas meter, but when I get it replaced should the
new one go to the elec meter or to the CU?

Getting to the electricity meter cupboard would involve getting the
floorboards up in the living room - so I'd rather not do that unless
absolutely nececary.

Appologies if this has been answered 100 times already.

Title: Re: Where should main bonding be to?
Post by scotspark on Oct 25^th, 2006, 11:25pm

is the consumer unit and meter not at the same location????????????

the 10mm cable can go to the main earth terminal (the small henly block connected to the incoming cable sheath) or into the consumer unit and connected to the earth bar.

Title: Re: Where should main bonding be to?
Post by SimonF on Oct 26^th, 2006, 8:40am

Hi Scotspark,

Thanks for the reply - saved me getting the floorboards up before the electrician comes round :)

> is the consumer unit and meter not at the same location????????????

No - they are at almost opposite ends of the house. Its an old house with a more modern (1950's) extension on the back. The older bit was, for obvious reasons, not designed with electrics in mind - solid walls, solid floors, no cavities in ceilings - so I guess it made access a lot easier to put the CU in the modern bit so cables can run in the ceilings easier.