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EICR Gas bond

aligarjon

HI guys.   I did an EICR this morning on a small domestic bungalow that was completely renovated/converted 6 years ago. There is no main bond to the gas . The water is all plastic.  The incoming gas main to the external meter is plastic.  The sole gas pipe into the property is buried in the floor screed and is obviously copper. This is a new gas pipe done at the same time as the other works.   My gut reaction is it should have been bonded as it's basically buried in the structure but then i can't see exactly how the pipe is run, there is a plastic insert through the wall but i don't know if it continues through the screed. Where it pops up out of the screed there is no plastic pipe, just bare copper.  As yet i have been unable to get access to the original EIC.  The rest of the electrical work has been done very nicely and it looks like they new what they were doing.   Any thoughts please.

 

Gary

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    You could do worse than slip your  meter on ohms between the pipe and the MET, or something known to be earthed.

    If you see a fraction of an ohm it is already bonded but you do not know where. It could be at an appliance.

    If you see many tens of k ohms its connection to the outside is tenuous, and any external voltage will be current limited by that ‘electrode resistance’ (which is probably more about concrete and the damp course membrane), and therefore safe.

    Only if you see something in between perhaps between 10 ohms and 25k ohms  is it actually possible that it might be dangerous if a  fault came on. That would need more thought and perhaps bonding.

    Mike.

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    You could do worse than slip your  meter on ohms between the pipe and the MET, or something known to be earthed.

    If you see a fraction of an ohm it is already bonded but you do not know where. It could be at an appliance.

    If you see many tens of k ohms its connection to the outside is tenuous, and any external voltage will be current limited by that ‘electrode resistance’ (which is probably more about concrete and the damp course membrane), and therefore safe.

    Only if you see something in between perhaps between 10 ohms and 25k ohms  is it actually possible that it might be dangerous if a  fault came on. That would need more thought and perhaps bonding.

    Mike.

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