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  1. C

    Advice on main supply please

    amlu, the substation cable is after the meters. There is no sign of overloading or thermal damage, and I have been told that the insulation thickness was doubled years after the installation was carried out. I personally don't think it represented a danger, I was just surprised that the cables...
  2. C

    Advice on main supply please

    Hi all, I'm looking for some advice on a main supply if anyone could help please. I'll explain the layout: supply from substation 100A fuse on 16mm 3-core SWA, armour earthed at sub end, not connected at other end. This supply feeds into four 63A MCBs, each one supplying a CU in a little...

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