Jerry said
"You would need to measure the current draw of the motor in question, and add about a 50% overload capacity to the fuse, then use the right size wire to carry the current draw".

Jerry is 100% correct - so correct this should be posted as a standard reply. On a small motor ie truck heater motor I go along with the 150% to allow for startng current since in many truck cases teh fuse has a multiple role ie fault current, motor starting current and motor overload protection.

Dan Bentler