Double Throw Switch Wiring Diagram

Dp switches control two independent circuits and act like two identical switches that are mechanically linked.

Double throw switch wiring diagram. Each of the terminals of a double pole double switch can either be in 1 of 2 positions. By design it is a physical impossibility for both power sources to supply the load simultaneously unless of course that is the intent. This is how you wire a double pole double throw dpdt switch. The dpst switch often appears in circuit breakers where it is used for 240 volt circuits with each pole carrying 120 volts separately.

The motors two power leads are reversed at one of the switches screw terminals. Eatons double throw safety switches include two interlocked switches with a common connection used to transfer service from a normal power source to an alternate source or to switch from one load circuit to another. A double pole double throw dpdt switch is a three selection electrical device in which there is one off and two on positions. The interlock ensures both switches cannot be closed at the same time preventing them from being operated in parallel.

Pole refers to the number of circuits controlled by the switch. Wire wrap right angle pc vertical pc smd smd with bracket solder lug quick connect. Sp switches control only one electrical circuit. A double pole single throw dpst switch controls the connections to two wires at once where each wire only has one possible connection.

In other words its like two simple switches controlled by a single actuator. This is where you need to connect your appliances. There is a metal rectangular tab on most double switches that indicates which side is for feed wires. Switches are rated for use on systems up to 10000a when protected with class h fuses or up to 200000a when protected with class r j or class t fuses.

Special circuits three throw on on on 3 5 and 9 11 external connection must be made during field installation. The other side is for the feed wire and gives the switch power. A double pole double throw dpdt switch is a switch that has 2 inputs and 4 outputs. An application for this switch is for reversing a direct current dc electrical motor.

Double pole double throw 3pdt three pole double throw 4pdt four pole double throw. Double throw switch on none on. All 2 and 3 pole double throw switches are suitable for use as service equipment. In its most basic form a transfer switch for a 120240v single phase service is simply a double pole double throw switch of proper ampere rating with a middle off position fig.

Sp and dp refer to single pole and double pole st and dt refer to single throw and double throw. Double throw switches are intended to transfer loads from one power source to another. Frequently the feed wire terminals screws are black or silver. Each input has 2 corresponding outputs that it can connect to.

All are ul listed.