How To Wire The Button Switch

The way a push button switch is wired depends on its type and the required control function. Common push button switch types include single pole single throw (SPST), single pole double throw (SPDT), double pole single throw (DPST) and double pole double throw (DPDT). 1

Single-pole single-throw pushbutton switches have only one closed state and one open state and are usually used for simple on/off control. When wiring, connect one end to the power supply and the other end to the load. When the button is pressed, the switch closes, current flows, and the load operates.

The single-pole double-throw push button switch has two states, a closed state and an open state, and can be used to control two different circuits. When wiring, connect a power source and a load to each end.

Bipolar single-throw pushbutton switches also have two states, but are used to control two independent circuits.

The double-pole double-throw pushbutton switch has two common terminals and two switching states, which are used to control the switching states of two circuits.

When wiring, you need to pay attention to the pin markings of the push button switch and ensure that the power supply, load and ground wires are connected correctly to avoid short circuit or abnormal operation. For example, the series wiring method is to place the push button switch in the middle of the circuit, and control the on and off of the circuit through the switching state of the push button switch. Specific steps include connecting the positive terminal of the power supply to one terminal of the push button switch, connecting the other terminal of the push button switch to one terminal of the load, and connecting the other terminal of the load to the negative terminal of the power supply.

The parallel connection method is to place the push button switch on the two branches of the circuit, and control the on and off of one of the branches through the switch state of the push button switch. Specific steps include connecting the positive terminal of the power supply to one terminal of the load, connecting the other terminal of the load to one terminal of the push button switch, and connecting the other terminal of the push button switch to the negative terminal of the power supply.
In addition, you also need to consider the difference between the live wire and the neutral wire, because the voltage and current carried by these two types of wires are different. Before wiring, the live wire and neutral wire should be determined first, and then connected according to the wiring method.