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Thread: Panel buzzing

  1. #1

    Panel buzzing

    Aside from an obvious culpret like a bad breaker, what could be the cause of a "buzzing" noise coming from a breaker (main load) panel????

  2. #2
    Join Date
    Aug 2004
    Location
    Plainfield, IN
    Posts
    889

    Re: Panel buzzing

    Could be the load of the circuit approaching the rating of the breaker.

  3. #3
    Join Date
    Feb 2003
    Location
    Seattle, WA
    Posts
    17,043

    Re: Panel buzzing

    Could be a good breaker that is badly mounted (i.e., loose bolts).

    Could be someone inside trying to get someone to open the door to let them out.
    Charles E. Beck, P.E., Seattle
    Comments based on 2014 NEC unless otherwise noted.

  4. #4
    Join Date
    May 2003
    Location
    Salt Lake City, Utah
    Posts
    5,319

    Re: Panel buzzing

    Originally posted by charlie b:

    Could be someone inside trying to get someone to open the door to let them out.
    You can't put a doorbell transformer or switch in the panel. Tell the people in the panel to knock loudly, not ring the bell. :mad:
    Ryan Jackson, Salt Lake City
    Inspector, Instructor

  5. #5
    Join Date
    Jan 2004
    Posts
    203

    Re: Panel buzzing

    Does this feed nonlinear load which could change freq. which may be the noise you are hearing

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