Definitely cap that neutral wire. Electric code is crystal clear that the only place in the premises that the neutral and ground should be connected is at the main service entrance panel. It's possible, though unlikely, that a wiring fault elsewhere in the house could cause all the return current in the house to go through that one outlet the way it's wired.
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Temporary charging solutions before a wall charger install
- Thread starter dsgerbc
- Start date
Sure it makes some sense. If someone wanted to stick with official Tesla adapters, they do sell a 6-20 adapter, but not a 6-30. So it's not taking advantage of the full capacity of the circuit, but is using all official parts if that is important to someone. Coming from you, who likes to throw shade at those EVSEAdapters aftermarket ones, I thought that would be obvious to you.
eprosenx
Active Member
The OP has four wires. He posted a picture of them even. He can install a 14-30. Fully code compliant and all Tesla factory parts. 24a charging. 6-20 makes no sense.
I guess I mixed up what the picture was referring to. I was thinking that was the L14-30 that has all four wires. I thought the 6-50 didn't.
eprosenx
Active Member
No worries! I mix up threads all the time.
Often tines similar discussions in multiple threads simultaneously...
Glamisduner
Active Member
either option 14-30 on the 6-50 plug or 14-50 on the other with 40 amp breaker should be fine. OP just need to pick the one that is less useful, or more convenient to modify.
eprosenx
Active Member
FWIW, the OP could actually potentially put a 50a breaker on that wiring used for generator inlet as it is 8 awg in conduit it sounds like. This assumes no derate for thermal reasons, etc... But that is right at the edge of the code allowance. 6awg is more optimal. But also, it might be trivial to just pull in 6 awg to the existing conduit (depending not on its size, etc...)
Glamisduner
Active Member
I forget the temp rating for romex but it should be THHN anyways. I'd probably go with a 50 myself, but 40 is safer without seeing the wiring.
Ampacity Charts - Cerrowire
eprosenx
Active Member
Most modern romex is rated to 90c by the manufacturer, but the NEC says you can't use over the 60c rating of it. You *are* allowed to use the 90c rating for any temperature and number of current carrying conductors in a raceway derating necessary. THHN is generally always 90c rated too. But you are limited by the 75c terminations on the breaker and on the receptacles.
So if Romex in that conduit, then you can only do a 40a circuit. If THHN you could do a 50a circuit assuming no other derating (max of 86 degrees Fahrenheit ambient temp), but it is right at the edge of the rating. If you ended up using that for EV charging I probably would just pull in 6 AWG for good measure since it sounds like it is a short run and then go with the 50a breaker.
But I personally would really want to keep the generator backfeed ability, so I would just install whatever new circuits were required.
Yup yup. I missed that a bonehead ran 10-3 +ground to a 6-50 (welding) receptacle.
Federico
Member
He said 8 awg on a conduit so I could assume is THHN and a 50A breaker should work too, but since he is going to get a wall charger in the future, 50A shouldn't make a big difference since the portable charger is 32A.
Best temporary solution is a 40/50A breaker and a 14-50R to charge at the maximum of a Gen2 charger (30/32 amp), but reading the last option (C) I didn't notice 14-50 Tesla adapter is out of stock.
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