reply to cowspotter
Re: Electric Vehicle Charging Station The Volt only pulls 14 amps and the charger ( its really just a smart extension cord for safety, as the actual charger is in the car ) lists a maximum 20 amp circuit breaker
A plane Jane 12AWG would be fine ... Going a larger wire might give you more options in the future but you'll have issues trying to put an 8AWG wire on either side, breaker or charger as the lugs don't support that large of a wire.
FYI, I own a Volt, and just use the 120V one that comes with the car, I've never had the need for having to recharge faster than overnight.