just skimmed through the thread and .. some of yall were saying not to use a ground with ac? ac don't work without a ground.........( not sure i understood you) yall are crazy.hell most new appliances come double grounded for safety(4 wire the 4 prong plug instead of the 3 you see on 240 v appliances) i guess thats the 4th wire your talk en about? should be red and black 120 120 v and then 2 grounds a green and a white? you don't really need the extra ground, its backup in case something happens to the other you can stack the grounds on top of each other
ps are you sure your gana run less than 30 amps?
ps are you sure your gana run less than 30 amps?