1 Reply Latest reply: May 25, 2011 12:18 PM by Leviton Technical Representative RSS

20 amp GFCI keeps tripping even without a load.

Newbie

I installed a heated floor & was using a 15 amp Gfci but was fine until i energized the floor. So I purchased a 20amp GFCI do I need to use 12-2 wire for that even to test it.  The 20 amp keeps tripping after i hook up the themostat.  Bottom line do I have to have 12-2 wire when using a 20 GFCI to keep it from tripping.