Double Pole Single Throw Toggle Switch Wiring Diagram

Commonly you ll see switches defined as single pole single throw single pole double throw double pole double throw which are more often abbreviated down to spst spdt and dpdt respectively.

Double pole single throw toggle switch wiring diagram. In other words it s like two simple switches controlled by a single actuator. An application for this switch is for reversing a direct current dc electrical motor. The dpst switch for example has four terminals however is a double pole dp and not a four pole 4p switch. Double throw closes a circuit in the up or down position on on.

A double pole double throw dpdt switch is a three selection electrical device in which there is one off and two on positions. When the switch is connected one way for circuit a and circuit b the lamp and led will both be on. A double pole single throw dpst switch controls the connections to two wires at once where each wire only has one possible connection. The other position of the handle is off.

Double pole single throw switch dpst circuit. Double switches sometimes called double pole allow you to separately control the power being sent to multiple places from the same switch. Single throw closes a circuit at only one position. It s got one output and one input.

D ouble pole switches are usually rated at 30 amps so any appliance or equipment requiring a greater power consumption have to be connected to a disconnect. Dt switches close a circuit in the up position as well as the down position on on. A single pole single throw spst switch is as simple as it gets. For example you might want to turn on a bathroom light separately from the ceiling fan.

The motor s two power leads are reversed at one of the switches screw terminals. Below is an example of a circuit which utilizes a double pole single throw switch. A double throw switch can also have a center position such as on off on. The center position is off.

A dt switch can also have a center position frequently on off on. You can see above how a double pole single throw switch can be used to put a circuit in any of 1 of 2 modes.