Single Pole Double Throw Light Switch February 16, 2019 DPST Switch . A DPST Switch has 2 inputs and 2 outputs, and can be used to put a circuit in any of 1 of 2 modes. Buy this double pole single throw light switch online. www.farmerboyag.com Three Color CableGuide To Wiring3 Prong DryerLight Circuit Wiring2 Switch 1 LightCeiling Fan And Light ControlReplace Light Fixture With FanBasic Electrics Explained