Here is a cautionary tale. We installed a new 50 amp breaker pair (by "we," I mean I hired a licensed electrician) for Tesla charging (this is in Florida). The new circuit seemed fine and had been used to charge Teslas on a number of occasions. However, in this incident, after charging my MS at 40 amps for a couple of hours, I got a notification "Charging Interrupted." Upon investigating, there was a stench in the room where the circuit panel is (odor of burning plastic), and the circuit breaker was too hot to touch. (It had apparently tripped due to thermal overload). The other set of breakers on the same panel pin was also very hot (this other one is a 60 amp breaker for the house A/C). Opening the panel, we see that the panel backplane was scorched on the right, and the two breakers were burned: Why did this suddenly happen? We called in the electrician who did the work, who said there was some corrosion on the pins where the breakers plugged in; these he cleaned with a wire brush and replaced the breakers. (He suggested replacing the entire panel, and by "coincidence" his company was running a special deal on this, only $1487!) My own post-mortem suggests an alternate explanation... this happened suddenly because this was the first time we had charged a Tesla during warm weather where the A/C was running constantly on the same panel pin. Could it be that these panel pins cannot support this continuous load (totaling 88 amps, i.e., 48 a on the 60-a breaker, and 40 a on the 50-a breaker)? Upon closer inspection, it appears to me as though the breaker the electrician originally put in for the new Tesla circuit was not a new one, but might have been a used one pulled from somewhere else (I say this because the switch on that breaker appears to have been snapped off and repaired with epoxy). In that case, maybe the contacts where the breaker connects to the panel pin had lost their strength and did not make a tight connection to the panel backplane.... So all you electricians in the group: can a single pin on a 200 a panel handle a continuous load of 88 a? If not, it is just a design problem, and the Tesla breaker should simply be moved in the panel so that it does not share a pin with the A/C breaker. If these pins can indeed support this kind of load, then maybe the panel does have corrosion, suggesting a replacement. Thoughts?