220V gfi

Discussion in 'General Electronics Chat' started by douglasbrkich, Apr 2, 2008.

  1. douglasbrkich

    Thread Starter New Member

    Apr 2, 2008
    1
    0
    My eletrician wired a 120/220V 20 AMP 50-60 GFI breaker to an air tub. This is the spec called for. he used 12-2. Is this correct? Should it have been 12-3? Code requires a GFI interupter in the bath. Is there a specific GFI for 220 vs the standard 120?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Seems strange, but that's how they do it. The breaker looks for a perfect balance of current. If one side draws as much as 5 ma more than the other, then it trips. The assumption is that the unbalance in current is caused by an accidental path to ground.
     
  3. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    In this particular application, a 12/2 with ground is indeed acceptable. Your only load is 220V, there are no 110V components on that circuit as there would be with a dryer or some such. The GFCI functions as Beenthere has described. It will open in not more than 1/40 of a second.

    Be sure to test the GFCI breaker every month. Have a licensed electrician replace it immediately if it goes bad.
     
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