myredracer wrote:
n7bsn wrote:
You don't really want to put a 2nd GFCI on an existing one. You will run into false ground-trips.
Afraid I don't agree with this either (EE here too). GFCIs in series doesn't cause nuisance tripping. What happens is when there is a ground fault, you won't know which GFCI will trip, or they could both trip. Unless a person knows that there are GFCIs in series, they may not be able to find the GFCI that actually tripped, or if both tripped, they likely won't know to look for a 2nd GFCI. If you can find something from a wiring device manufacturer saying multiple GFCIs causes tripping, I'd like to see it. I've done a lot of googling and nothing says that it causes tripping. Some outdoor appliances (pressure washer,for ex.) have a GFCI built into the cord and they work fine when plugged into a GFCI recept.
I've had series connected GFCI's do false trips, which is why I stated that