Discuss Bonding Gas Supply in an Outbuilding in the Electrical Forum area at ElectriciansForums.net

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Piratepete

Hi Guys
Doing an EICR of a property.
The client has an outbuilding with gas and water supplies. It has it's own CU fed from the main CU in the house.
The water is bonded but the gas is not.
The water supply is underground from the house in plastic and then changes to copper which is bonded.

The gas supply comes from the house in an underground copper pipe linked to the gas pipes in the house. So, electrically, it would be subject to the bonding in the house.
But does this negate the need to bond it in the outbuilding?

Looking forward to wise words!

Cheers
Pete:confused:
 
Last edited by a moderator:
NO, it doesn't negate main bonding to the outbuildings CU (EMT) especially if the supply is PME, in which case the sub-main earth should be a minimum of 10mm....
 
NO, it doesn't negate main bonding to the outbuildings CU (EMT) especially if the supply is PME, in which case the sub-main earth should be a minimum of 10mm....

I read it that he is saying the gas is bonded in the house and is in copper pipe to outbuilding so is bonded already. The Water they have bonded in outbuilding because it has plastic pipework across to it.
 
I read it that he is saying the gas is bonded in the house and is in copper pipe to outbuilding so is bonded already. The Water they have bonded in outbuilding because it has plastic pipework across to it.

It doesn't matter a jot whether the gas pipe is bonded at the main house or not, it still needs bonding at the outbuilding....
 
I read it that he is saying the gas is bonded in the house and is in copper pipe to outbuilding so is bonded already. The Water they have bonded in outbuilding because it has plastic pipework across to it.

Yes. your interpretation is correct.
My immediate thought was that it should be bonded, but I couldn't understand why it hadn't been done as the gas supply is an easy connection within 2 metres of the CU and all services were put in at the same time, 10 years ago. The water stopcock and bonding point are miles away.
Pete
 

So with no more information than a blue plastic pipe entering a building and then converting to copper you have decided it does not need bonding? Without any information as to where that copper goes or how it is installed which could make it extraneous?
 
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