Spst Wiring

As the lever moves from the off position to the on position the internal contacts close.

Spst wiring. This is how you wire a double pole double throw dpdt switch. This allows current to flow through the circuit and powers the device connected to the switch. Inspect the end of each wire.

Dpdt on on functions like two spearate spdt switches operated by the same actuator. They are independent of each other and could be of different voltages. The diagram below represents the schematic diagram for a spst rocker switch.

Spdt on off on only one of the loads can be energized at a time. Pin 1 is where the rocker switch receives the input power. It should have about 1 2 inch of bare wire at the end and should be formed into a hook like loop.

An illuminated rocker switch is like a spst toggle switch with an extra terminal which allows the light to work. Now that we know what each terminal pin represents we now wire it to a circuit for it to do a real world function. Pin 2 is where the accessory that the switch is going to turn on is connected.

If the wire end is in poor condition trim off the bare end. Spst switches should only require two terminals. The two terminals are either connected together allowing current to flow or disconnected from each other breaking the circuit as you throw the switch.

We re going to connect a single pole single throw relay to a circuit to light up a led. The circuit symbol for an spst switch in the off position and a through hole right angle maintained spst rocker switch. Sometimes referred to as a single pole single throw switch abbreviated to spst.