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a/c tripping circuit breaker

Discussion in 'Electronic Repair' started by PipoG, Jul 22, 2003.

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  1. PipoG

    PipoG Guest

    When I turn on the a/c in three separate rooms it trips the circuit breaker
    after a few minutes. Any suggestions? Thanks for your input
  2. CJT

    CJT Guest

    don't do that?

    check your wiring?
  3. its you

    its you Guest

    Is it only one breaker that's tripping? If so, what current is the
    breaker that's tripping rated for? If it's 15A or even 20A it may
    just be doing it's job, as A/C's can draw a lot of current, and 3
    running off a single line could be drawing significant current when
    all the compressors switch on, etc... which may be why it takes a
    minute, just until they are all drawing maximum current. Check each
    A/C unit for it's current rating, if any, on the label. Add them up,
    and if the wire, lines, plugs, and breaker are all rated for the
    current, but it still blows, it could be a bad breaker, they do get
    old and sometimes just trip under less of a load then they're rated
    for. If you're experienced in electricity delivery you could try
    changing the breaker with an exact replacement, but of course there's
    240VAC (usually) present at the breaker box at all times, even when
    the main breaker is shut off (the delivery to the main breaker stays
    on constantly), so be careful or you could get fried. Best to have an
    electrician come and check it if you're at all uncomfortable with
    doing it yourself. You could just test the line coming out of the
    breaker with a clamp on type current meter if you have one (you have
    to take off the front breaker panel, usually four large flat headed
    screws) before you try changing the breaker just to check out the
    current draw. Either way, be careful, all it takes is a slip of the
    screwdriver to hit one of the distribution blocks which aren't
    insulated and have lethal potential.
  4. Texan

    Texan Guest

    1) Don't turn on three A/C units at the same time.
    2) Plug one or more of them in on a different circuit.
    3) Buy some really good fire insurance and keep doing what your doing.
    That way you can buy a new house with central A/C with the
    settlement when your old house burns down from overloading circuits.
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