Bought a lot of 10 Allen-Bradley 100-C30 ser. C contactors from a local factory that was cleaning out used inventory. I used 2 for my 5500w heating elements and one for main power. So I have 7 left for sale. These are 3pole which worked perfectly for me, 2 hot wires and a power wire for an indicator light. They are 240 single phase, you could easily use up to a 6500w element. The coil is 120v so it is simple to control by a selector switch. I seen these on ebay for over $60 for used ones, $100 plus for new ones. $22ea + shipping.