BobinBoulder
Member
The only way the car has to know the "appropriate current" is seeing which plug you connect to the UMC. (Or by getting the info from the EVSE if you're plugged into fancier equipment.) There's no way for the car to know what sort of circuit you're actually plugged in to, it just has to assume that you're plugged into a circuit which matches the plug you're using. If you use the 14-50 plug, then the car will draw 40A (unless you manually dial it down), even if the circuit only has a 40A breaker, or if you're plugged into an adapter for a 14-30 outlet on a 30A circuit.
Interesting... So the "intelligence" is built in to the adapter to tell the car what amperage to pull. I'm guessing that the guy at the service center either doesn't know this, or assumes that no one is using a third party adapter. I'll have to bring him up to speed on this.
Thanks everyone for the education. I appreciate it.