Do I need a neutral white wire to install a 220v GFCI breaker in the main panel ?
Currently have 220v, 2 pole red hot, black hot and green ground in the circuit running pool pump timer and pump.
Or can I use the green wire as neutral?
I believe the answer is no.
Please advise.
Thank you.
Best Answer
No, you do not need a neutral "load" wire if you're running only 240V load. The GFCI will detect any imbalance between the two phases and trip if one occurs. See picture below.
The green wire can never be used for anything but a ground.