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Earth Bonding Gas & Water Pipes

AncientMariner
Assuming the copper water pipe (above the stop-cock at end of MDPE pipe) is close to the gas pipe, is it acceptable/permissible for the earth bonding conductor to be a single 10 mm² green/yellow from the consumer unit to go to say the water 351 earth clamp, looped around the screw and then to the gas 351?  This without cutting the cable, so that it is one continuous length. Or if not looped around the crew, for a bare section to be opened up 3 strands and 4 strands and the screw fitted between?
Thanks.
Clive

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  • 0
    I'm going to disagree with BOD!


    Whichever way you do it, there is a tendency for the strands to be flattened between the washer and the clamp.


    If you poke the screw through, one side may be a little flatter than the other, but that's why there is a washer rather than just a screw head - it is able to slope a little whilst making contact.


    If you loop round a full 360°, you have 7 strands under most of the washer, but 14 where they cross over, so that must be worse.


    By my reckoning, you only need to go round 180°, which forms an omega shape.


    I think quicker and easier to form a loop than poking a screwdriver through the middle.


    The reason for not cutting the cable is supposed to be that if the first termination is removed, the second one remains intact.
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  • 0
    I'm going to disagree with BOD!


    Whichever way you do it, there is a tendency for the strands to be flattened between the washer and the clamp.


    If you poke the screw through, one side may be a little flatter than the other, but that's why there is a washer rather than just a screw head - it is able to slope a little whilst making contact.


    If you loop round a full 360°, you have 7 strands under most of the washer, but 14 where they cross over, so that must be worse.


    By my reckoning, you only need to go round 180°, which forms an omega shape.


    I think quicker and easier to form a loop than poking a screwdriver through the middle.


    The reason for not cutting the cable is supposed to be that if the first termination is removed, the second one remains intact.
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