Long story short, I remembered my parents have a NEMA 14-50 in their garage on a 40A circuit breaker, run with 8-3 NM. I'm pretty sure it's only been used once or so in the last ~20 years since it was installed. If I were ever in a pinch, would there be a problem just letting the car do its thing and pull 40A, for an hour, maybe two. Since this would be a maybe once-in-a-year thing, I'm not worried about doing a load calc figuring in a continuous load. What I'm wondering is since the definition of continuous load is 3+ hours, and I don't intend to get near that, and definitely not a regular basis, can I count on the full 40A? Of course, if the breaker trips, I'll dial it down to the correct 32A for the 40A circuit.