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Earthing and Bonding

Former Community Member
Former Community Member
Hi All


Working on a scheme whereby we have a private transformer serving the site - TN-S arrangement. This comes into the building, we then split to feed a switchboard in one part of the building which is existing, the second split heads to a new build part which has the second switchboard. This new build contains swimming pool. The supply to the new switchboard is via a busbar 3L+N+PER. Question relating to earth bars - we currently have the main earthing bar at the intake point which is at the existing switchboard location - we then had cable feeding out to the new earth bar at the new switchboard location. Contractor is proposing that they remove this interlinking earth cable between bars, and take a bond directly from the new switchboard earth bar to the new earth bar in the room. Does this sound feasible - to me doesnt sound right, but I can't find anything specific to say not.


Many thanks
Parents
  • Being sized for both earthing and bonding.......... well now what - add the two sizes together I suppose. I know asked this same question last too............darned if I can remember the answer.

    It only has to satisfy both requirements simultaneously - no need to add - so if it has to be say 2.5mm2 for a c.p.c. and 10mm2 for a bond, a 10mm2 will do.

      - Andy.
Reply
  • Being sized for both earthing and bonding.......... well now what - add the two sizes together I suppose. I know asked this same question last too............darned if I can remember the answer.

    It only has to satisfy both requirements simultaneously - no need to add - so if it has to be say 2.5mm2 for a c.p.c. and 10mm2 for a bond, a 10mm2 will do.

      - Andy.
Children
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