When I went from a 2hp DC to a 3hp DC I added a 'definite purpose contactor' relay to the controller circuit. Instead of powering the DC motor the controller circuit activates the relay, which powers the motor. It's built to take the high currents that occur during startup. I got mine from Grainger for around $22 plus shipping. I was able to shoehorn it into a large outlet box, thus avoiding having to buy a more expensive enclosure for it. I've attempted to attach a pic.
Reply With Quote