Posted by buickanddeere on October 24, 2008 at 05:19:07 from (66.135.114.231):
In Reply to: Re: 3 phase wiring posted by Walt davies on October 23, 2008 at 08:43:10:
The ground wire is not to carry running current, That is what the insulated white is for. The bare ground wire is used to hold the chassis, not the current path down to ground potential. The ground is also supposed to keep the neutral from floating above earth potential. If ground and neutal was the same. Why does the electrical code call for three live lines, an insulated neutral and a bare ground, five wires? A 120/208 grounded Y system is very flexable and economical system to install and operate. 120V single phase loads, "240V" single phase and three phase motors. Even 347/600 three phase with with a delta/Y transformer. No wild legs and odd taps as some of those grounded deltas have.
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