Another GFCI question ..

Discussion in 'Electrical Forum discussion & Blog' started by thassler, Mar 23, 2009.

  1. thassler

    thassler Member

    Dec 5, 2006
    Systems Analyst
    The general theme of this thread: is that if any appliance trips a GFCI, then that appliance is suspect defective (if gfci checks ok). Question: what if the manufacturer specifically states in the user manual that the appliance should not be used on a circuit that is GFCI protected? I've a treadmill that we use in the garage where of course gfci is required; it intermittently trips the gfci outlet. No big deal, it's not that often (once a week) and we simply reset it. Should the treadmill be thought of as defective? Are there times concerning an inductive load that a certain amount of leakage to ground is acceptable? Thoughts ..
  2. jwelectric

    jwelectric Electrical Contractor/Instructor

    Jun 14, 2007
    North Carolina
    The requirements found in 210.8 of the NEC has no bearing on what the manufacturer of the treadmill recommends.

    The NEC mandates that all 125 volt 15 and 20 amp receptacles installed in a garage be GFCI protected and we must adhere to this rule.

    If the manufacturer of the treadmill recommends that the equipment not be plugged into a receptacle that is protected by GFCI then I would suppose that it couldn’t be used in the garage.

    If the treadmill is tripping a GFCI then there is a problem with the treadmill that needs addressing. UL has mandated that no appliance have more than .005 amps (5 milliamps) of current leaking to ground for many years now so yes indeed if it trips the GFCI it does not meet the Standard by which UL mandates and this alone says it has problems.

    I have a very old treadmill that I walk on four days a week per doctors orders. This treadmill is plugged into a GFCI receptacle and it doesn’t trip or at least it hasn’t for the past couple of years. The minute it does--- out the door it goes!!!!
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