PDA

View Full Version : I have a panel, each phase to neutral 117.7, a-grd 140, b-grd 65, c-grd 172


rolmiller
Jan 23, 2015, 12:33 PM
3 phase 208/120 Y panel
A to neutral 117.8, B to neutral 117.7. C to neutral 117.8 but
A to ground 140.0, B to ground 65.7, C to ground 172.2
I think I must have lost a neutral in one of my branch circuits and it is feeding back on my ground not sure. Difficulty is it is in a call ceter full of computers and the only way to narrow it down is to kill all the branch circuits in the panel and turn the circuits on one at a time until I find the circuit that is backfeeding. Am I on the right track? I s there an easier way to find it?
THOUGHTS?

Missouri Bound
Jan 24, 2015, 07:23 PM
Your diagnosis is probably correct. Circuit by circuit hopefully will show you the issue.
You already know what phase it is on.

stanfortyman
Jan 25, 2015, 06:07 AM
The way to find this is with a phone. Call a qualified electrician!
This is absolutely not a diy job.