Also, if you do need to install a receptacle but you don't have a neutral wire, a 6-50 receptacle is always an option. It is kind of funny that 14-50's have become so popular for EV charging when really they have a superfluous neutral wire. I am sure the reason for that is all because of Tesla: They include the 14-50 adapter by default. And I am sure the reason for that is because 14-50's are a lot more common in the wild than 6-50's (i.e. every RV park in the US has them basically).