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    mwagg's Avatar
    mwagg Posts: 5, Reputation: 1
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    #1

    Jul 8, 2007, 06:08 PM
    GFI Tripping Under Small Load
    Hi All,

    I have a GFI that keeps tripping under a light load (Treadmill running).

    It is a 20A circuit.

    The wiring was done by me. This is the only room that is giving me fits!

    All grounds are connected securely.

    Any ideas out there?? :confused:
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    Jul 8, 2007, 06:57 PM
    Could be the treadmill, replacing will determine faulty gfi. If new gfi does same thing, follow wiring through treadmill and determine ground connection with hot.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #3

    Jul 9, 2007, 02:42 AM
    Most of the treadmills I know draw quite a bit of current, and need their own 20 amp circuit. If there is anything else running on the circuit, it may overload the breaker and trip.

    The treadmill belt may be adjusted to tight causing the motor to draw more current that normal.

    There could be a ground fault in the treadmill that is tripping the GFI.

    Or the breaker may be defective.
    mwagg's Avatar
    mwagg Posts: 5, Reputation: 1
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    #4

    Jul 9, 2007, 08:10 AM
    Thanks for the responses.

    What I can't figure out is that if the treadmill is plugged into a different GFI protected circuit, it doesn't pop the GFI.

    Anyway,

    Thanks again for the input.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #5

    Jul 9, 2007, 08:47 AM
    Seems to narrow it down to a defective GFI breaker.
    mwagg's Avatar
    mwagg Posts: 5, Reputation: 1
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    #6

    Jul 9, 2007, 02:02 PM
    One would think so. So that's exactly what I did... replace the GFI... same result.

    I think I will try plugging something different in and see what the result is.

    Thanks again TK
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #7

    Jul 9, 2007, 02:14 PM
    Weird, the unit works fine in another GFI protected outlet, and still trip in the original outlet with a new GFI breaker. Perhaps there is something damaged inside the outlet you want to use that only shows up when something is plugged into it.

    Before you replace the outlet, check to be sure the bare wire inside the outlet box is not touching the neutral, sometimes that causes nuisance tripping when the outlet is used.
    mwagg's Avatar
    mwagg Posts: 5, Reputation: 1
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    #8

    Jul 9, 2007, 02:19 PM
    Plugged my guitar amp in and nothing happened. This would indicate a problem with the treadmill, but... it doesn't pop any other GFIs.

    I am truly stumped.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #9

    Jul 9, 2007, 02:35 PM
    Try changing the outlet anyway. An amp is very low power draw.
    mwagg's Avatar
    mwagg Posts: 5, Reputation: 1
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    #10

    Jul 9, 2007, 04:34 PM
    Will do.

    Thanks
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #11

    Jul 9, 2007, 04:46 PM
    Also, verify, Hot on dark screw, line, Have no wires on load, if protecting treadmill and
    Something else, the leak to ground could be total of 2 items?

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