If your bypassing a safety feature with a switch................just a word of caution. Can you post some diagrams of what your doing? If your interrupting the current to the motor with a toggle switch you've got to have a switch that will handle the current of the motor. The DC stuff I am most familiar with is Fincor, they do large electric motors, heavy amp draws don't know of a switch that would handle the loads. They are four wire motors. Two field wires, two armature wires, you can change rotation by reversing the field wires or the armature wires. Field circuits are lighter loads. If the motor is 2 wires it would be a permanent magnet motor and you would just reverse the power and ground on the leads. Usually the controller for the motor would have a reversing function with a control circuit. If you wire your switch into the control circuit that would be safest but there could be a provision for that. One more little thing, Horse Power is roughly 750 watts to 1 HP. Wattage is the function of voltage times amperage, with this knowledge you can figure out the amp draw of the armature leads. I find my self giving a lot of advise here with out really enough information about what your doing. Sorry for that. Tim