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TT—30P (120v) to 14-50P (240v) adapter?

ajdelange

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Can you provide a link to the adapter you’re using? I’ve got a TT 14-30 connection on rural property that I’d like to use to charge but the 14-30 to 14-50 adapter I bought won’t let Rivian EVSE power up. It works fine on a 14-50 or a regular home outlet so I don’t think it is the EVSE.
In another thread you showed a picture of a TT-30R receptacle. There is no such thing as a TT 14-30. You would not be able to plug a 14-30 to 14-50 adapter into a TT-30 receptacle (which would prevent it from working for sure). A 14-30 has exactly the same pin arrangement as a 14-50. The only difference is that the pin opposite the round pin is not flat.
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bhopkins

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bhopkins

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In another thread you showed a picture of a TT-30R receptacle. There is no such thing as a TT 14-30. You would not be able to plug a 14-30 to 14-50 adapter into a TT-30 receptacle (which would prevent it from working for sure). A 14-30 has exactly the same pin arrangement as a 14-50. The only difference is that the pin opposite the round pin is not flat.
I probably called the receptacle by the wrong terminology :). So, the adapter I bought is then a TT-30 to 14-50..
 

ajdelange

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I probably called the receptacle by the wrong terminology :). So, the adapter I bought is then a TT-30 to 14-50..
Figured it must be something like that.

I note in checking the link that the adapter which apparently works is labeled "For TESLA or EV only. Not for RV." In thinking on this for a moment it occurs to me that for RV use you would want to wire X and Z (the parallel flat pins 180° apart) together and connect them to hot pin on the TT-30. This would allow 120V loads in the RV on whichever side of the panel to work (but any 240V load in the RV would see 0V). OTOH for charging an EV you would want to wire one of the 180 ° pair to hot and the other to neutral. So there are, apparently, two types of TT-30 to 14-50 adapter and you need to be sure you have the right type.
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