I believe I have a double pole GFI since it has a neutral pig tail connecting the breaker to the neutral bus. I've connected the neutral from the hot tub to the neutral (white dot) location on the breaker, and the neutral from the service panel to the neutral bus.
will the GFI operate without the neutral wire connected at the hot tub, and only a ground connection?
I don't think there is a place for a neutral in the spa control panel. There is a 3rd lug for a wire to connect to, and a separate grounding bus; but the (currently empty) 3rd lug is connected to the grounding bus by a thick green wire. When I connect the neutral to this lug and connect the bare ground to the ground bus the GFI trips.
All of the connections on the grounding bus were full with other, smaller green wires coming off the pump and controls. I was wondering of the 3rd lug was actually just a grounding lug since it was connected to the grounding bus.
Since I don't know anything about GFIs, I just wanted to know if the GFI would trip if only the 2 hots and a ground were connected between the GFI and the hot tub.