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    batosai's Avatar
    batosai Posts: 1, Reputation: 1
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    #1

    Sep 2, 2007, 09:14 PM
    Grounding System
    How was the grounding system working when a ground fault appear, and where the fault current flow?:)
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Sep 2, 2007, 09:51 PM
    Is this what your asking?

    The 120V GFCI looks for an imbalance (~5 mA) in the HOT and Neutral legs.

    Since G and N are connected together, we have a path to earth and it's a non-isolated system.

    Suppose you had a metal cased 2-conductor corded drill (they don't make them anymore) and were drilling something standing in a puddle of water. The case becomes live because of a defect. Your body touches the drill and you happen to be standing in a puddle of water outside. A small amount of current will be diverted through your body, activating the GFCI and it turns the source off. DON'T TRY THIS AT HOME.
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