ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades correct way to wire a thermal overload switch

The ones on the motors we use have two circuits, one through the heater, one not (or it could be dual heater/contact). When the motor is wired in 120V mode, the start and one run winding runs through the heater, the other run winding through the non heater contact. In 240V mode, the "other" run winding is in series after the first run/start winding.