Re: [RE-wrenches] Fwd: Grounding on aglacier
My understanding is that it saves cost to ground one of theconductors. Then
you can use single pole switches, fuses andbreakers. If both of the circuit
conductors are 'hot' then youwill need to use double pole everywhere.
Why? A single pole switch will stop the current regardless of whether one of
the conductors is referenced to ground or not.
You can test whether the neutral is grounded quite easily with amultimeter. I
believe that everyone does ground it. Everywhere that I ask it turns out that
it's been grounded. Herewe lately have a new wiring system called Protective
Multiple Earthingwhere the ground and neutral are combined into one wire
(saving oncost). This has the interesting side effect that the whole housewill
become 'hot' in the event of a failure of this oneconductor.
And here, if you lose the ground/neutral, you have 240v on 120 circuits.
Todd
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