While the meeting yesterday had no real topic I learned a lot about public charging in a discussion with Charles. I think others learned a little about the implications of the National Electric Code Article 625 which is about charging EV's and conduction charging sites.
After the meeting I was thinking about something Andrew said about charging his EV at various sites and having to change the vehicles charge rate. Back to the National Electric Code, if you have a 50 Amp circuit breaker and 50 amp wiring, a 50 amp receptacle, you can only use 80% of it or 40 Amps. The missing 20% allows for variations in the circuit breaker manufacturing, things heating up, and a safety factor so the breaker does not trip. The other thing is when a 50 amp receptacle is used, many people expect a 50 amp breaker. But the 50 amp 14-50P receptacle has become the standard or the RV industry but actually supplies vary 30, 40 and 50 Amps. For no problems ask what amperage is available and use 80% of that.
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