Grumpycat
Elite Member
I would have paid a bit more for #6 copper. You wired a NEMA 14-50 which is usually expected to be on a 50A circuit for 40A continuous duty. And you are placing it where an RV could access. Upping the capacity a bit future-proofs the installation.It's a very simple charging system. We bought this enclosed 50A receptacle from Amazon (30A-50A is the same receptacle) connected to a 40A breaker. The Model 3 already come with a NEMA-14-50P adapter for its charging cable so that's all we required. Wired a #8 3 conductors (red, black and white + ground) wire from the breaker box to the receptacle. We were already renovating/repainting so make holes in the drywall at the junction of the ceiling and the wall to pass the wire wasn't an issue. Distance was 85' so #8 wire was the recommended size for that distance.
Tesla does not use neutral, but you have to have it to be code compliant with the 14-50. The RV requires neutral to be able to split the 240 into two 120 circuits.