Ask Experts Questions for FREE Help !
Ask
    rolmiller's Avatar
    rolmiller Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Jan 23, 2015, 12:33 PM
    I have a panel, each phase to neutral 117.7, a-grd 140, b-grd 65, c-grd 172
    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's Avatar
    Missouri Bound Posts: 1,532, Reputation: 94
    Ultra Member
    		  
    #2

    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's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    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.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Finding Outcomes,6 grd [ 0 Answers ]

Arthur is taking advance classes during spring break.He takes one of five different classes each day.What is the probability that he gets either the math or science class on Tuesday?

Do single pole breakers hook black to breaker and neutral & grd to bonded neutral bar [ 6 Answers ]

I have an Eaton Cutler-Hammer meter/breaker box. (MB816B200BTS-FLCH) I want to run a 20 amp circuit (underground wire) from this box through existing underground conduit to a receptacle for a dishwasher. This run would be app. 15' to 20' and from my main house panel it would be 40' to 50'. All...

In the Kitchen: 117v @ grd, 4v@ neutral. No coffee. [ 7 Answers ]

I came home tonight to find the kitchen outlets that usually work fine aren't working. The coffee maker won't work, the toaster oven won't work and the counter top griddle won't work. There are 3 receptacles in question: 2 duplex outlets down-line from a GFI. I tried testing and resetting the GFI...

Hot/Grd [ 1 Answers ]

Hi. One one side of my wall there are 2 sockets that get the message from my tester of Hot/Grd reverse. Also, on one of the adjoining walls, it is the same thing. The rest of the house is fine. Do you have any suggestions of what to do? Thank you. Doug

View more questions Search