Just installed a GE sub panel fed by a 70 AMP breaker at the main panel (8 inches away) and running 30 feet with #6 THHN to a NEMA 14-50 outlet. Car will draw 40 amps for 10 min or so and trip the 50 AMP breaker at the sub panel. Repeated this several times. Breaker and wires are warm, but not hot. Backed the car down to 30 AMPs and after about an hour get a warning that the car is experiencing charging problems, check source. I have this exact set up at another location and it works fine. Anyone have any experience similar to this?
This shouldn't be a marginal situation. I believe all of the install specs are exactly per Tesla recommendations. Yet, it's acting like the car is drawing more than it says. Any help appreciated.