> > > > >Neutral line from pole is hooked up to ground distribution bus bar > >inside breaker panel. House is supposed to have a good quality earth > >ground with high ampacity wire connecting it to panel's ground bus. > >So neutral line from pole should be grounded at both ends (i.e. on > >the pole and inside the house's breaker panel). > > > > Doesn't this create a ground loop? If only it were that simple. I've done electrical work in two neighboring counties, they used different building codes {CABO vs BOCA, IIRC} One _required_ that the ground and neutral lines be connected at the service panel, the other _prohibited_ them from being connected. And when questioned both inspectors claimed the other way was unsafe. -Denny -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist