When sizing conductors for a motor that can run on 120 or 240 do you have to size for 120 even though it is going to run on 240?
I would decide what voltage I intend on running the motor at and then determine the wire size. Obviously, using a higher voltage will use less amperage, therefore a smaller wire. That seems to be the way to go in this case since you mentioned thee not being much room in the wiring box.
