Double Pole Single Throw Toggle Switch Wiring Diagram

A double pole double throw dpdt switch is a three selection electrical device in which there is one off and two on positions.

Double pole single throw toggle switch wiring diagram.

An application for this switch is for reversing a direct current dc electrical motor. It s got one output and one input. In other words it s like two simple switches controlled by a single actuator. The motor s two power leads are reversed at one of the switches screw terminals.

A double switch allows you to operate two lights or appliances from the same location. Double pole single throw switch dpst circuit. The center position is off. Double throw closes a circuit in the up or down position on 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. Single throw closes a circuit at only one position. 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. A dt switch can also have a center position frequently on off on.

Dt switches close a circuit in the up position as well as the down position on on. For example you might want to turn on a bathroom light separately from the ceiling fan. Below is an example of a circuit which utilizes a double pole single throw switch. 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.

Double switches sometimes called double pole allow you to separately control the power being sent to multiple places from the same switch. The other position of the handle is off. The dpst switch for example has four terminals however is a double pole dp and not a four pole 4p switch. A single pole single throw spst switch is as simple as it gets.

When the switch is connected one way for circuit a and circuit b the lamp and led will both be on. Single pole throw and double pole throw switches are by far the most common switches but triple and quadruple configurations are also available.