Remove the old switch. One black wire comes from the power source and the other goes to the light s.

Wiring A 3 Way Dimmer In A Single Pole Application With Screw Terminals
How does a single pole switch work. It is commonly used in onoff applications such as switches for light. These switches will have two terminals on the back to connect your wires. Single pole switches have two brass terminal screws and a toggle labeled on and off. It is a switch that provides a secure connection or disconnection over two terminals. Single pole single throw on off switches are the most common of the switches. Most also have a grounding screw that connects to the circuits ground wire.
Turn off the power. Its got one output and one input. A single pole switch is most easily identified by the onoff markings printed on the switch toggle lever. Disconnect the old switch wiring. The dpst switch often appears in circuit breakers where it is used for 240 volt circuits with each pole carrying 120 volts separately. Watch this video to learn more about single pole switches.
Dpst on off switches are designed to two devices or circuits on or off from the same switch. When installing always connect two hot wires to it not two neutrals. Spsts are perfect for on off switching. For that reason theyre sometimes referred to as single location switches. No other type of switch has these markings. A single pole switch has two brass terminal screws on the side that receive the black hot wires of the circuit.
Spst on off switches are designed to turn a single device or circuit on or off. This type of light switch controls one light fixture or electrical outlet from a single location. The switch will either be closed or completely disconnected. A single pole switch turns an electrical device on and off from a single location. A double pole switch is referred as a double pole single throw switch. Single pole switch is referred as a single pole single throw switch.
In other words its like two simple switches controlled by a single actuator. When you turn the switch off it interrupts the electricity that flows through the black wire from the power source to the fixture. A single pole single throw spst switch is as simple as it gets. Single pole onoff switches a single pole switch is one that just turns the lights off or on from one wall location. Turn off the power to the switch circuit by switching off the circuits breaker in your homes service panel breaker box.