Wiring Schematic Switch Symbols

Wiring Schematic Switch Symbols

Switches are used to control the flow of electricity in a circuit. They can be used to turn devices on and off, or to change the state of a circuit. There are many different types of switches, each with its own unique symbol in a wiring schematic. ### Single-Pole Single-Throw (SPST) Switches The most basic type of switch is the single-pole single-throw (SPST) switch. This type of switch has two terminals, one for the input and one for the output. When the switch is closed, the input terminal is connected to the output terminal, and current can flow through the circuit. When the switch is open, the input terminal is disconnected from the output terminal, and no current can flow through the circuit. The symbol for an SPST switch is a circle with a line through it. The line represents the movable contact of the switch, and the circle represents the fixed contact. ### Single-Pole Double-Throw (SPDT) Switches A single-pole double-throw (SPDT) switch has three terminals, one for the input and two for the output. When the switch is closed, the input terminal is connected to one of the output terminals. When the switch is opened, the input terminal is connected to the other output terminal. The symbol for an SPDT switch is a circle with two lines through it. The lines represent the two movable contacts of the switch, and the circle represents the fixed contact. ### Double-Pole Single-Throw (DPST) Switches A double-pole single-throw (DPST) switch has four terminals, two for the input and two for the output. When the switch is closed, the two input terminals are connected to the two output terminals. When the switch is opened, the two input terminals are disconnected from the two output terminals. The symbol for a DPST switch is a rectangle with two lines through it. The lines represent the two movable contacts of the switch, and the rectangle represents the fixed contacts. ### Double-Pole Double-Throw (DPDT) Switches A double-pole double-throw (DPDT) switch has six terminals, four for the input and two for the output. When the switch is closed, the two input terminals are connected to one of the output terminals. When the switch is opened, the two input terminals are connected to the other output terminal. The symbol for a DPDT switch is a rectangle with four lines through it. The lines represent the four movable contacts of the switch, and the rectangle represents the fixed contacts. ### Other Switch Symbols There are many other types of switches, each with its own unique symbol. Some of the most common types of switches include: *

Toggle switches:

Toggle switches have a lever that can be moved up or down to change the state of the switch. The symbol for a toggle switch is a rectangle with a line through it. The line represents the lever of the switch, and the rectangle represents the body of the switch. *

Push-button switches:

Push-button switches have a button that must be pressed to change the state of the switch. The symbol for a push-button switch is a circle with a dot in the center. The dot represents the button of the switch, and the circle represents the body of the switch. *

Slide switches:

Slide switches have a slider that can be moved left or right to change the state of the switch. The symbol for a slide switch is a rectangle with a line in the middle. The line represents the slider of the switch, and the rectangle represents the body of the switch. ### Using Switch Symbols in Wiring Schematics Switch symbols are used in wiring schematics to represent the different types of switches that are used in a circuit. The symbol for a switch can tell you the type of switch, the number of poles and throws, and the state of the switch. By understanding the different switch symbols, you can easily read and understand wiring schematics. ### Conclusion Switches are an essential part of electrical circuits. They can be used to control the flow of electricity in a circuit, and they can be used to change the state of a circuit. There are many different types of switches, each with its own unique symbol. By understanding the different switch symbols, you can easily read and understand wiring schematics.

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