On Thu, 17 Jul 2008 16:46:07 -0500, metspitzer
wrote:

On Thu, 17 Jul 2008 16:41:37 -0400, mm
wrote:


I don't understand. I thougtht a GFCI tripped if there was no ground
like there should be.

How would a GFI trip any more than a any breaker just because it got
wet?


A GFCI trips if the current on one leg is not equal to the current on
the other leg. This happens when current goes to ground thru another
path, like your body. A GFCI doesn't need an "electrical source
ground" to work.

Thanks. I get it.

They are often installed because there is not a grounding wire at the
device.