Simple Two Way Switch Circuit. An spdt switch has three terminals. Two inputs and two outputs.
Three wire cable runs between the switches and the outlet. This type of switch is sometimes called an a b switch because it lets you choose between two circuits called a and b. The electricity flows from the hot wire black through the 2 way switch shown in off position and then to the light and returns through the neutral wire white.
Dpst double pole single throw.
This is a completed circuit. The first way of wiring uses a couple of two way light switches with a 3 wire control. A dpst switch has four terminals. An spdt switch has three terminals.
