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  1. T

    Correct size MCB for ring with 2.5 t&e but 1.0mm CPC

    Hi, Thanks for responding to my question, but how would I do the calculations to back this up please?
  2. T

    Correct size MCB for ring with 2.5 t&e but 1.0mm CPC

    Hi All, Just joined as I have a question, which is: What size MCB should I use when replacing a 30 Amp 3036 fuse on a ring circuit that uses the old odd sized 2.5mm t&e with 1.0mm CPC. I have been reading up on calculating the CPC from cable lengths, fault currents and all sorts and have...
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