My electrician who has done lots of other work at my house says to install the Nema 14-50 with 8 gauge wire, not 6 gauge like the Tesla site says. I know nothing about electricity other than it can kill you. Is this ok? He said 6 gauge is for runs of over 150 feet or something like that. The 14-50 will be about 35 feet from the electrical panel, 200 amp total box