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Thread: High leg voltage to ground

  1. #11
    Join Date
    Jun 2003
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    NE (9.1 miles @5.07 Degrees from Winged Horses)
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    Quote Originally Posted by starsandstripes View Post
    The panel the transformer feeds was off, no load readings. Went back today and checked neutral to ground - 60 volts! Found a bad connection on x4 neutral and repaired. Now reading 208 volts high leg to ground. Zero volts ground to neutral. Would that bad connection have prevented a circuit breaker from tripping on a phase to ground fault?
    Good job.

    Yes.
    Tom
    TBLO

  2. #12
    Join Date
    Apr 2009
    Location
    Williamsburg, VA
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    5,042
    Quote Originally Posted by starsandstripes View Post
    The panel the transformer feeds was off, no load readings. Went back today and checked neutral to ground - 60 volts! Found a bad connection on x4 neutral and repaired. Now reading 208 volts high leg to ground. Zero volts ground to neutral. Would that bad connection have prevented a circuit breaker from tripping on a phase to ground fault?

    I Echo the above posters sentiment good job finding the problem.

    since you had a partial ground, there is no way to tell if a line to ground-fault would have tripped a breaker. as was mentioned above if there was no connection, you would have an ungrounded system... a line to ground-fault simply would have grounded it, and not trip a breaker.
    Electricians do it until it Hertz!

  3. #13
    Join Date
    Feb 2009
    Location
    Durango, CO, 10 h 20 min without traffic from winged horses.
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    9,374
    Quote Originally Posted by starsandstripes View Post
    Would that bad connection have prevented a circuit breaker from tripping on a phase to ground fault?
    Would it have? No way to know for sure if a ground fault would have pulled enough load to blast through the bad connection.

    Could it have? Yes. I just got done troubleshooting a high resistance ground fault the other day.
    If you go and decide to dance with a gorilla the dance ain't over till the gorilla decides it's over.

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