Rewiring a 5-15 Adapter

[kingston-ont]

Good afternoon. I have a 14-50 receptacle at home but forgot to pick up a 14-50 adapter when I took delivery of my M3P today. I could order one but am thinking instead of (i) buying a 14-50 male connector (from Home Depot), (ii) cutting off the male end of the 5-15 connector that came with the car, and (iii) wiring the female end of the connector that came with the car to the 14-50 male connector. (Then ordering a new 5-15 adapter.) Can anyone point me to a wiring diagram for the mobile adapter that would assist me in doing this?

 

[Jeremy3292]

This is not a good idea and I don't follow your logic at all. You're going to spend $35 on a new 5-15 adapter and $20 or more on a 14-50 connector at THD instead of just buying the 14-50 adapter for $45?

 

[AlexP]

The cabling inside the 5-15 adapter is probably rated to a max of 15Amps. If you put 40amps on it will be a fire hazard. Also, the 5-15 only has 1 hot while the 14-50 has 2 hots. Both have ground and neutral.

If you are willing to burn down the house and the car, then, by all means you can try it.

 

[MLXXXp]

I would advise against it. The 5-15 plug that you will be cutting off has a thermistor in it that the mobile connector uses to detect overheating at the outlet. You likely wouldn't be able to properly add this thermistor to the store-bought 14-50 plug.

You would also have to rewire some of the other pins on the female side, that plugs into the mobile connector, to indicate that it can draw 32A at 240V instead of 12A at 120V.

 

[Jeremy3292]

Also if you look at EVSE Adapters website they sell just the tail without the plug but you have to choose which amps you want, meaning you can't retrofit a 5-15 plug with a 14-50 pigtail. There is a chip in each adapter that limits the charge the Tesla will accept.

Connector for Tesla Model S/X/3/Y Gen 2 (tail without plug) – EVSE Adapters

www.evseadapters.com

 

[kingston-ont]

Thank you all. Plan scrapped, 14-50 adapter ordered!