EV Charger off garage sub panel fed with AL

[T74]

Hi, had some EV Charger wiring method questions.

Most or all EV chargers require copper conductors. If a detached garage has a sub panel fed with aluminum then then running copper from sub panel would be fine?

I know most services are AL so I get that its the same thing.

This instance would be #6 AL feeding garage. Then #8 copper feeding car charger on a 40 amp breaker.

 

[retirede]

It’s fine. The reason for the copper wire requirement on every EVSE I’ve seen is due to the lug rating.

I’ve seen aluminum used for the branch circuit when the run is a long one, then a j-box near the EVSE where the last few feet transition to copper.

 

[LarryFine]

Agreed. Disconnects are often ideal places to transition between different wiring methods.

 

[jaggedben]

Any instruction like that to use copper conductors, on any equipment, only applies to the conductors that actually terminate on the equipment.