grounded breaker popping

Discussion in 'General Electronics Chat' started by paulmars, Nov 2, 2014.

  1. paulmars

    Thread Starter Member

    May 13, 2010
    35
    0
    I bought a used frig. it worked for a few days, now it keep popping the 20a breaker. If I disconnect the ground, it then works fine. I even trued a completely different circuit and again it pops in a few seconds, but if I disconnect the 3rd wire ground, it then works fine.

    ideas?

    tks,
    pa
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,364
    Sounds like a dangerous situation that calls for expert investigation.
    I would recommend unplugging the fridge and have it checked out.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,556
    2,375
    Obviously has a fairly heavy ground current to trip a 20A breaker, I assume it it is not a GFI variety?
    It would be advisable to either test where the leakage is occurring or obtain the help of someone skilled in finding the fault.
    Often there is a schematic on the rear somewhere for the electrical details.
    Moisture etc could be the cause.
    Probabally the reason it was sold in the first place.:rolleyes:
    Max.
     
  4. crutschow

    Expert

    Mar 14, 2008
    13,039
    3,243
    There does appear to be a short between the mains hot lead and the refrigerator's chassis, which is a dangerous situation. With the unit unplugged, measure the resistance between both of the plug pins to the ground pin. It should be many megohms if normal.
     
  5. paulmars

    Thread Starter Member

    May 13, 2010
    35
    0
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,556
    2,375
    Very low indeed!
    A question of isolating the area or section which is causing it, and test a section at a time for the GND leakage..
    Refer to the schematic if it has one on the back.
    The cord did not get fractured in the move, by any chance?
    Max.
     
    Last edited: Nov 4, 2014
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