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Hi, I'm Mike G and I'll be assisting you. What are you needing the receptacle for?
You don't have any restrictions for the installation other than protecting a cable within 8 ft of the floor.
You'll need 6/3 with a ground, that's a 4 wire cable.
Either would be OK.
That only being a 60A sub you'll need to originate the EV circuit in the main panel.
Only if the wire size is right. You need a #2 Aluminum or a #4 copper in the sub feed wires.