A Tail of Two Cables

[DavidP-R1TAdventures]

I am waiting to get my level 2 charger installed in 10days and 110V charging is really insufficient. I thought I could unplug my dryer and use the 220V outlet.
But it turns out they are different.
Any advice on making this work?
thanks.

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[chrismc]

The portable charger uses a 240 volt 50 amp plug (NEMA 14-50 type), while your dryer uses a lower-capacity 240 volt 30 amp plug (NEMA 14-30) which is incompatible. You can purchase an adapter that goes between them, which will require lowering the charging amps in the truck’s charging screen to 24 charging amps (the most allowed on a 30 amp circuit) to avoid overloading the dryer outlet wiring and tripping the circuit breaker.

I have the following adapter:
CircleCord NEMA 14-30P to 14-50R EV Charger Adapter Cord Compatible with EV, 30 Amp Dryer to 50 Amp EV for Level 2 Charging https://a.co/eRcoPx6

 

[DavidP-R1TAdventures]

Thanks Chris. I order one of those adapters.

 

[ajdelange]

The portable EVSE that comes with the truck when equipped with the 14-50R plug-in tells the truck it can have 32 A. If you use an adapter like the one linked in the previous post it will do that and unless you tell the truck to take 24A or less it will take more than the NEC allows for a 30 A circuit. If you don't do anything the truck will take the full 32 A from the 30A breaker causeing it to trip eventually, If you don't care about the code, think you are smarter than the people who wrote it and are sure that you will always remember to reduce the charging rate then don't waste your money on the adapter, Just cut off the neutral pin (it's not used) and the 14-50 will plug into the 14-30 outlet. I specifically and vehemently declare that you should NOT do this with the adapter or the plug modification.

There is a "legal" way to do this (the police won't come to your house if they find out you are using an adapter) i.e. "legal" means code compliant. Buy a Tesla UMC and the 14-30P plug in for it. Also obtain a Tesla Tap or equivalent. Plug the 14-30R pigtail into the UMC, put the Tesla Tap on the output cord and plug that into your truck, Your truck will be told it can have 24A and will take no more than that whether you remember to adjust draw or not (which you don't have to do). This solution is going to cost you a few hundred bucks. You have to decide whether it is worth the peace of mind,

 

[chrismc]

There is a "legal" way tto do this (the police won't come to your house if they find out you are using an adapter) i.e. "legal" means code compliant. Buy a Tesla UMC and the 14-30P plug in for it. Also obtain a Tesla Tap or equivalent. Plug the 14-30R pigtail into the UMC, put the Tesla Tap on the output cord and plug that into your truck, Your truck will be told it can have 24A and will take no more than that whether you remember to adjust draw or not (which you don't have to do). This solution is going to cost you a few hundred bucks. You have to decide whether it is worth the peace of mind,

If you’re going to suggest spending the money on a new EVSE, why on earth would you go for a convoluted solution with Tesla adapters in lieu of just getting a 14-30 standard J1772 EVSE like this one?

Splitvolt 24A NEMA 14-30 EV Charger with 16 ft Cord, Level 2 240V, Fastest NEC-Safe 30 Amp Circuit Charging, J1772 Plug, Includes EVSE Cable Travel Bag https://a.co/2xYgcTg

 

[ajdelange]

f you’re going to suggest spending the money on a new EVSE, why on earth would you go for a convoluted solution with Tesla adapters in lieu of just getting a 14-30 standard J1772 EVSE like this one?

I guess because I already have one. The second reason would be because the Tesla UMC will accept a bunch of other pigtails too giving the owner of one many other charging possibilities. And finally because he can charge any BEV on the road (except ones with CHAdeMO) with the Tesla unit. For those that must charge from 120 the Tesla UMC allows them to take advantage of 20A circuits.

 

[Riviot]

Any advice on making this work

I'm telling you, my rubber mallet is ?

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