grounds [RE-wrenches]
hugh piggott
hugh.piggott at enterprise.net
Mon Aug 6 15:00:52 PDT 2001
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>Hugh,
>In our country, tying a current-carrying conductor to ground at one point is
>called bonding.
same here
> You then have a "grounded" conductor--the neutral, which is
>current-carrying but has zero potential to ground--and a "grounding"
>conductor (the bare or green), which carries current only in a fault
>situation.
Here we have a bare or green conductor (with yellow stripes) except
we call it 'earth'. And it never carries load current. In cases
where there is multiple neutral-earth bonding, then the neutral (a
black wire here) becomes the ground (pme 'protective multiple
earthing'). I can never understand the logic of multiple neutral
grounding like that.
>It's confusing also because multiple ground rods are "bonded" together, so
>there can be no potential between them.
same here too :-) We also bond the water pipes etc.
>Trace emphasizes bonding AC and DC
>ground paths together because otherwise that potential (such as a
>lightning-induced surge) fries stuff in the inverter, where both come
>together.
>Does this help?
Yes thanks. It sounds as if the terms are just as ambiguous in the
USA as they are here. It's time someone thought of a clearer way to
describe all of these connections.
--
Hugh
http://www.ScoraigWind.co.uk
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