Let me preface this by saying i did my research, i got an electric car and the charger is limited to 12A draw internally, but it is designed to handle both nema 6-15 and nema 5-15 specs. If you run it at 110 12A it will charge in 9 hours, if you run it at 220 12a it will charge in 4.5.
The adapter already came with a nema 5-15 which i cannot change as it has a temperature sensor in it which i would like to keep, but if i send hot hot neutral through its nema 5-15 connector it would treat it as 6-15 and operate correctly.
I already have a 2phase panel outdoor for my hot tub rated for 50A where the hot tub has a 30A breaker. I will be adding a 2nd 20 amp breaker for this.
The question is as follows, should i run it into a nema 6-15 plug, then build a converter from 6-15 to 5-15, or simply use a 5-15 and wire it hot hot ground. I would be violating code, but adding in an adapter is pointless, the wiring is meant to handle 12 amps regardless of voltage, so i assume a 5-15 should handle 220v 12a without issues.
What are your thoughts?