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Explain why RCDs fitted into extension leads or incorporated into plugs are forbidden

Adam Seddon

this question is inside a mentor guide at the place i work for someone to be signed off as a fully competent electrician.

none of us can think of any reason why this may be the case, can anyone else?

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    Explain why RCDs fitted into extension leads or incorporated into plugs are forbidden

    I might suspect that the thinking is somewhat simpler - from an electrician's point of view all wall sockets (≤32A) should have 30mA RCD additional protection - so given that there should be no need for extra RCDs downstream. Indeed any thoughts that RCD provision at/before the wall socket could be omitted because what's normally plugged into them incorporates its own RCDs is going about things the wrong way. Likewise where a pre-existing socket doesn't have RCD protection, the correct solution would be to add RCD protection at or before the socket, not after it.

       - Andy.

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    Explain why RCDs fitted into extension leads or incorporated into plugs are forbidden

    I might suspect that the thinking is somewhat simpler - from an electrician's point of view all wall sockets (≤32A) should have 30mA RCD additional protection - so given that there should be no need for extra RCDs downstream. Indeed any thoughts that RCD provision at/before the wall socket could be omitted because what's normally plugged into them incorporates its own RCDs is going about things the wrong way. Likewise where a pre-existing socket doesn't have RCD protection, the correct solution would be to add RCD protection at or before the socket, not after it.

       - Andy.

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