At 09:58 AM 10/19/2006, Aaron wrote: > > > >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). Not really - the ground conductivity is usually several orders of magnitude less than resistance of the neutral conductor. The terminology might be what's messing you up. The pole transformer (residential) has an isolated secondary winding: 240 Vac center-tapped. All 3 wires go into the house. In addition, the center-tap (neutral) is grounded to earth with a ground rod at the pole *and* another ground rod (or 2) at the house. dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 22 years of Engineering Innovation (1984 - 2006) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist