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  1. H

    Supplementary earthing to a metal switch

    can anybody tell me if it's necessary to add supplementary earthing when replacing a plastic switch for a metal one, i.e adding and additional earth wire to the switch, even if the back plate is earthed ?
  2. H

    Lighting - switch wiring

    Hi - i'm trying to replace all the sockets and switches in my house. Just the front plates. the trouble is that the wiring and switches I take off look nothing like the diagrams. There are a mass of red wires on some 2 way 2 gang switches and in some cases small pieces connecting across the...
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