Utilizing old 40A electric stove circuit for Tesla charging..?

[my313]

I have a spare 40A circuit previously used for electric stove. Now since we switched to gas stove and have a Tesla, can I just utilize the existing 40A breaker, wire and relocate the 50A electric receptacle to install a 240v circuit near the panel for the EV charging? I plan to limit the charging to around 25A only. Anything I need to check specifically?

 

[wws]

It is likely either an older 10-50 or a newer 14-50 receptacle. (Difference is one has a safety ground connection, the other doesn't.) You can buy a 14-50 adapter for the mobile connector (UMC) from the Tesla store. Or a 10-50 UMC adapter from evseadapters. Current is limited to 32 amps - so is fine for a 40 amp circuit.

 

[ATPMSD]

I can tell what you would be needed in the U.S.

1. Assuming you have four wires (hot-hot-neutral-ground) purchase a commercial / industrial grade NEMA 14-50 outlet. If you have only hot-hot-ground then get a NEMA 6-50
2. Label it as a 40 amp outlet
3. Replace the existing breaker with a GFIC 40-amp breaker (GFIC is required in the U.S.)
4. Buy the Tesla 14-50 (or 6-50) adapter for the UMC

A 40-amp circuit is limited to a continuous load of 32-amps (40-amps * 80% = 32-amps). The UMC is internally limited to 32-amps, which works out perfectly. You should be able to plug-in the UMC into the outlet and the car, and see a charge rate of 32-amps

 

[CrankyGypsy]

Not really applicable in this instance, but an older Gen 1 Mobile Connector will top out at 40A.

 

[ElectricNerd]

I can tell what you would be needed in the U.S.

1. Assuming you have four wires (hot-hot-neutral-ground) purchase a commercial / industrial grade NEMA 14-50 outlet. If you have only hot-hot-ground then get a NEMA 6-50
2. Label it as a 40 amp outlet
3. Replace the existing breaker with a GFIC 40-amp breaker (GFIC is required in the U.S.)
4. Buy the Tesla 14-50 (or 6-50) adapter for the UMC

A 40-amp circuit is limited to a continuous load of 32-amps (40-amps * 80% = 32-amps). The UMC is internally limited to 32-amps, which works out perfectly. You should be able to plug-in the UMC into the outlet and the car, and see a charge rate of 32-amps

I have a Grizzl-E EV charger and the instructions specifically say not to use a GFCI breaker as the charger itself has that protection and won't work if you have a GFCI breaker. I have a Bryant receptacle installed and it works perfectly fine. Mine is a 50amp breaker but since I have a Model 3 SR+, it does top out at 32A. I have the 50 amp for future proofing for if we decide to purchase a second EV.

 

[Don.Church]

I have a Grizzl-E EV charger and the instructions specifically say not to use a GFCI breaker as the charger itself has that protection and won't work if you have a GFCI breaker. I have a Bryant receptacle installed and it works perfectly fine. Mine is a 50amp breaker but since I have a Model 3 SR+, it does top out at 32A. I have the 50 amp for future proofing for if we decide to purchase a second EV.

I believe that they are mentioning the GFCI breaker because National Electrical Code requires it. If you want avoid that extra expense, install a direct connection charger (EVSE).