Spa Sub panel

[thedefchef]

Man... now i have really effed up. So i was wrong to assume the power box for the AC could be used for a spa? The electrician that i just spoke to gave me an ear full.
The power at the AC unit has 2 #6 and a bare ground. Is there any way i can make this location work for my spa? I tried to install a 50 spa sub panel but i don't the a insulated neutral wire. So the GFCI is not working correctly.
Any suggestions or help would be appreciated!!!

Dean..

[HayZee518]

the air conditioner is straight 240 volt. the bare wire is an earth protection ground. It is not supposed to be used as a neutral even though it connects to the same bus in your main panel. a sub panel has its neutral isolated above the equipment or case ground. the enclosure or case ground needs its own ground [the bare wire] to an auxillary ground bar. for a sub panel you will need a four wire cable. #6-4 will do the trick unless you are really far away from the panelbox. no more than 3% voltage drop per 100 feet.