I have an outlet box in garage that contains two No. 6 wires that was used for an electric heater. Would like to covert it to a NEMA 14-50 outlet to be used to charge an electric vehicle.
The No. 6 wires come into the box through a 3/4" metal conduit. Do I need another No. 6 for common? And can another No. 6 be pulled through the conduit with the other two 6s already there? The distance of the pull would be about 45 feet with two 90 degree bends.
Thank you very much.