Dryers are usually plugged into 30A circuits. Old dryer outlets were NEMA 10-30 and new dryer outlets are now NEMA 14-30.
Ovens and RVs nowadays utilize NEMA 14-50, which is the outlet I would install for EV use
if at all possible.
I once tried to install 14-50 in a garage and made the mistake of telling the inspector it was for a dryer and thus had to subsequently back off and put in a 30A circuit breaker and 14-30 outlet.
The 14-50 and 14-30 Ground and Neutral are tied together at the circuit breaker panel, which is then supposed to be properly 'grounded'. bradleydavidgood777, if you utilize an electrician s/he will hopefully be up to speed regarding the latest codes and appropriate grounding (which are ever-changing, especially in the world of renewable energy). As an aside, HomePower magazine
has an informative discussion of code updates and implementation in every issue.
Many years ago I standardized my collection of adapters using NEMA L6-30 which was far more than adequate for the i-MiEV.http://www.katiekat.net/Vehicles/Mitsi/EVSEAdaptersJoeS.pdf
Now, with modern EV chargers drawing 32A, I find that my collection is obsolete and I keep adding more.
Looking to the future, although I'm comfortably running my Tesla HPWC at 40A on the three-prong 6-50 welder circuit for now, I can program my Tesla with dual chargers to draw 80A so I'm contemplating hardwiring the HPWC into my presently-unused furnace 100A circuit if I want to run any higher. Why unused? - I burned wood for 20 years, but now understand the carcinogenic and greenhouse gas error of my ways and still don't use the darn thing and simply have space heaters scattered throughout my all-electric house.