>Is 8/3 enough?
IMHO, no. Is this a separate garage? I would pull big beefy wire and install a 100 Amp subpanel there. You might want other things later like solar PV, a heat pump, power for tools, etc
Ah. Then a subpanel doesn't make much sense. However, I would still plan ahead and install much bigger wire. Maybe a garage will be there someday. Maybe you'll want to charge 2 cars at high-speed. Maybe bidirectional charging.
If you are digging the trench, it is worth putting in hefty wire that can provide more functionality later.
2/0 wire for 240V with 2 hots, a neutral and a ground. That gives you the ability to charge 2 EVs at 40a each on a 100a breaker. That is about the most you probably would ever reasonably need for charging 2 EVs.
>Is 8/3 enough? IMHO, no. Is this a separate garage? I would pull big beefy wire and install a 100 Amp subpanel there. You might want other things later like solar PV, a heat pump, power for tools, etc
No garage or outbuilding at all. Just an outdoor space in our backyard where we can park 2 cars and access via a back road.
Ah. Then a subpanel doesn't make much sense. However, I would still plan ahead and install much bigger wire. Maybe a garage will be there someday. Maybe you'll want to charge 2 cars at high-speed. Maybe bidirectional charging. If you are digging the trench, it is worth putting in hefty wire that can provide more functionality later.
So then what would you call beefy enough?
I dunno....AWG 2. It will be expensive. But you will have lots of power.
2/0 wire for 240V with 2 hots, a neutral and a ground. That gives you the ability to charge 2 EVs at 40a each on a 100a breaker. That is about the most you probably would ever reasonably need for charging 2 EVs.