On 12 Feb 2026 at 9:22, Thos True via EV wrote: > If you are connecting a 30A charger, it would be wise to choose a 30A > circuit breaker, rather than a 50A.
I'm not a pro electrician, so please forgive me if I'm speaking out of turn, but wouldn't you use a 40a breaker there? If memory serves, the NEC limits sustained loads to 80% of the circuit's rating. So for a 30a charger, you'd need a circuit able to deliver 37.5a. Practically speaking, that's a 40a circuit. COROLLARY: Assuming that you installed wiring rated for 50a, could you not use a 50a breaker in the panel, and protect the charger with a 40a breaker or fuse adjacent to the charger or its receptacle? (I've seen this done with motors, such as water pumps, so it might not be applicable here.) SIDEBAR: FWIW, the UK requires every cord cap to contain a fuse for the device's rated current. David Roden, EVDL moderator & general lackey To reach me, don't reply to this message; I won't get it. Use my offlist address here : http://evdl.org/help/index.html#supt = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = When I'm asked when there will be enough women on the Supreme Court, I say "When there are nine." People are shocked. But there've been nine men, and nobody's ever raised a question about that. -- Ruth Bader Ginsburg = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
