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commercial 3 phase

  1. J

    3Ph supply to sub panel

    Hello all, after some advice please. I have got a small job installing some 16a commando sockets in a farm workshop. The workshop has a 3ph sub DB on the wall which is fed from the main DB on the other side of the wall, about 25m away. The sub DB is supplied from two lots of 6mm2 twin in 25mm...
  2. T

    Advice on 461.2 needed

    Hi folks, Just need a bit of advice regarding whether or not neutrals require switching. - 3 phase board, 3 pole main switch, neutral is un-switched. 416.2 (ii) states that switching of the neutral is not required if the conductor is reliably connected to earth by a low resistance to meet the...
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