Warning

[banditpowdercoat]

Originally Posted by StirCrazy

actualy a GFI measures the difference between the hot and the nutral, doesn't measure the ground at all. so this is wrong.

An arch fault breaker is esentualy useless on a fish tank unless you have an animal that chewes cords, especialy if you have MH lights, and I recomend against having them on anything important as they frequently have false positive trips. they are still trying to design a more reliable arc fault. It does pee me off that they made a misfunctioning componant code, hopefully they will come out with a more reliable version soon.
basicly if you have an electric motor, MH lighting, or any old school relays don't use Arc fault..

Steve

No, I'm not wrong. It measures the difference between Hot and neutral, yes. So if it leaks to ground, it sees a difference. if the circuit is normal, or even if device has an internal short to neutral, it will not trip. Current flowing in the hot lead, equals current flowing on the Neutral. Only other place it can go is ground.
I mighta worded it a little funky, but by sensing the current to ground, it uses the imbalance of the H-N wires



And yes, in all new construction or wiring reno's, AFI is code in BC for bedrooms and bathrooms.