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 120 Gauge WireElectrical Installation For BeginnersHow To Wire A Four Way SwitchWire Conductor ChartHow A Two Way Light Switch WorksColored Power CordsStx38 Wiring DiagramPeugeot 307 Wiring Diagram