On Wed, 27 Sep 2006, Rick Glazier wrote:
I don't want to split hairs, but the rules are different in
"feeder panels". The neutrals and grounds are handled
differently, IIRC...
True, sub-panels need to have the neutrals and grounds
separated in the sub-panel and the two conductors run back to
the main panel separately. Also the neutral can not be bound to
the sub-panel enclosure itself. For a good explanation of why
neutrals and grounds have to be separated in sub-panels, visit
<http://www.terrylove.com/forums/archive/index.php/t-7204.html>
I am sure there will be other variations, but generally for a
main panel, the neutral and ground should be bound together.
All of this probably only applies to the US. :)
To get back on the computer side of this... many UPS units have
a "faulty wiring" indicator on them, and when these light up, I
take out my handy-dandy receptacle tester and test the circuit.
The most common problems are reversed polarity, or no ground.
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