Wow, thanks for all the great comments and suggestions, everyone. To answer a few questions:
- yes, this is a dedicated circuit that will only serve the EVSE. The code is a little ambiguous wrt receptacles and CB amperage - it says something to the effect of "outlets shall have an ampere rating of not less than the load to be served" - this indicates that you *could* put an outlet with a higher ampacity than the breaker - but then it goes on to say "and shall comply with 210.21(A) and (B)" - which are tables that basically indicate that only a 30 amp receptacle is acceptable for a 30 amp circuit. So thanks for the clarification on this confusing code.
- the adapters are a cool idea, but they push this project over the budget line for me. I like the idea of just getting the 14-50 and swapping the plug for a 14-30. That would allow me to wire up the box to code with a 14-30 receptacle.
- Thanks for the explanation on the 10-30. That's what I figured, but the use of the neutral left me with some doubt. I actually have a Kia Soul, but mynissanleaf is a much better forum for these types of questions than the Soul EV forums because people like you are engaged
The Soul is capable of 6.6kw charging, so yes, getting the configurable EVSE would be a great choice as I could charge much more quickly and have alot of flexibility, but it's just not in the budget for this project.
I think at this point I'm going to order the 14-50. I'll either wire up a 14-50 receptacle at the box, label it so nobody tries to plug in a 40 amp load, and call it good, or I'll get the 14-50 plug and just buy the 14-30 and swap it.
Thanks again for all the help!