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practical need for supp bonding in bathroom

wallywombat
Can anyone suggest a realistic scenario where supplementary bonding would be required in a bathroom or other 701 location? I'm failing to think of one, although I may be overlooking something blindingly obvious.


It can be omitted as long all three of these are satisfied: ADS in time; RCD present; any extr-c-p connected to main bonding.


If ADS can't be done in time by either MCB/RCD then its not legal anyway.

RCD has to be present anyway.

Water and gas pipes etc should already be main bonded if they introduce a potential.
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  • Former Community Member
    0 Former Community Member
    I am working on a freestanding double garage  being converted to a small flat at the moment. Water comes into the building in plastic, there is no gas, so the mains services are not bonded. Has its own dedicated PME supply.  Water is distributed above the bathroom in plastic but the owner wants chromed copper downpipes from the loft space. In the bathroom there will be;

    A sink with cold water tap fed by an exposed chrome pipe.

    An 3 kW hot water hand wash above the sink, exposed chrome pipe.

    An 60w oil filled electric towel radiator.

    A 600w macerator.

    A loo with cold water exposed chrome pipe inlet.

    An extractor fan.

    A 9.5 kW shower fed by an exposed chrome pipe.

    A very nice IP rated LED light.


    Its very tight in there and much of it can be simultaneously touched.   Disconnection times are no problem and all circuits are either an RCD or RCBO.  I believe the whole lot needs bonding, am I right ?

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  • Former Community Member
    0 Former Community Member
    I am working on a freestanding double garage  being converted to a small flat at the moment. Water comes into the building in plastic, there is no gas, so the mains services are not bonded. Has its own dedicated PME supply.  Water is distributed above the bathroom in plastic but the owner wants chromed copper downpipes from the loft space. In the bathroom there will be;

    A sink with cold water tap fed by an exposed chrome pipe.

    An 3 kW hot water hand wash above the sink, exposed chrome pipe.

    An 60w oil filled electric towel radiator.

    A 600w macerator.

    A loo with cold water exposed chrome pipe inlet.

    An extractor fan.

    A 9.5 kW shower fed by an exposed chrome pipe.

    A very nice IP rated LED light.


    Its very tight in there and much of it can be simultaneously touched.   Disconnection times are no problem and all circuits are either an RCD or RCBO.  I believe the whole lot needs bonding, am I right ?

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