So I'm trying to understand now just how to wire up a 240v 2 speed pump but how they work. From what I read there is a high speed, lower speed and common terminal. In 240 volts does one hot leg go to common and the other hot leg go to high or low speed depending on what you want? Or does the high AND low speed terminal get the other hot leg when you decide you want high speed mode? I'm guessing to control this you would use a SPDT relay coupled with a SPST relay. The SPST relay would decide whether or not the power is delivered and the SPDT relay would choose either the high or low speed terminal.