The motor uses 1800w. That is 15a/120v or 7.5a/240v.

Basically, at 120v there are two circuits in parallel; at 240v they are
wiried in series. In series the resistance is 4 times as high as in
parallel, and (since the voltage is twice as high) they draw half the
current.
Well, I thought this was pretty neat the first time I changed a motor over.