Hi guys!
I have a 40A EV charger I want to put in my garage. In the garage is a 40A sub-panel with a 8-3 NM-B cable. I would run a 30A breaker with a 24A draw on #10 THHN wire to the 14-50R NEMA (EV rated) connector and set the charger to the 24A position. My question is will the 8-3 NM-B wire be sufficient for the continuous draw or is the heat rating too lower for this? The manual requires a 90C temp wire to be used with continues current.
Alternative is that I go another 15 feet to the main breaker in the house and do a 40A breaker with a 32A draw setting on #8 THHN cable to the 14-50R connector (EV rated).
I just don't want to go with the sub-panel if the 8-3 NM-B cable can't handle the continuous feed to the charger.
Many thanks for you replies!,
Bobby
I have a 40A EV charger I want to put in my garage. In the garage is a 40A sub-panel with a 8-3 NM-B cable. I would run a 30A breaker with a 24A draw on #10 THHN wire to the 14-50R NEMA (EV rated) connector and set the charger to the 24A position. My question is will the 8-3 NM-B wire be sufficient for the continuous draw or is the heat rating too lower for this? The manual requires a 90C temp wire to be used with continues current.
Alternative is that I go another 15 feet to the main breaker in the house and do a 40A breaker with a 32A draw setting on #8 THHN cable to the 14-50R connector (EV rated).
I just don't want to go with the sub-panel if the 8-3 NM-B cable can't handle the continuous feed to the charger.
Many thanks for you replies!,
Bobby
