I have received a few quotes to install my Tesla Wall Connector for my model 3. The biggest difference between the quotes is wire size. All electricians have their reasons, i’d like to know what you think My setup: 60A circuit breaker 48A max charging amps (wall connector setting #9) 35 ft. From breaker box to connector location Wire Ampacity Ratings 6/3 Romex = 55A 4/3 Romex = 70A Contractor #1 6/3 Romex NEC 240.4(B) exception allows rounding to next highest breaker size if wire ampacity is in between breaker sizes. Contractor #2 4/3 Romex +$220 more expensive As a side note, what wire size are you running to your Tesla Wall Connector (HPWC)? Also I am doing the 3 wire so I can replace my HPWC with a NEMA 14-50 when I move.