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It is a type of switch or relay where there is just one set of contacts. The contacts can be open or closed. There are two terminals. A standard light switch like you would find in your home is a good example of a switch with a SPST contact.

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Q: What is a single pole single throw?
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What is a two way lever switch?

In electrical terminology it is known as a single pole double throw switch.


What is dpst switch?

Double pole Single Throw switches are sometimes called DPST switches. Assuming the circuit is single phase two wire system, DPST - are used to isolate the ciruit. Isoloation occurs on both terminals hence it is called double pole. This isolation occurs at only one end in the circuit, hence it is called single throw.


What is a one gang two way switch?

It switches two separate wires with one switch throw. <<>> It is two individual single pole single throw switches mounted side by side and are enclosed in a single enclosure. The single enclosure is called a two gang junction box.


What is the single pole and double throw switch?

A single pole switch is the ordinary switch that is used to turn the lights off and on in your home. A double throw switch is also known as a 3-way switch in North America. A double throw switch has a single pole connected to a common screw or terminal, often black. There are 2 additional screws or terminals, often brass colored. In one switch position this pole is connected to one of these screws or terminals and in the other position it connects to the other screw or terminal. If you think of a baseball diamond as an example for this switch, in one position the base line from home to first is hot. In the other position the base line from home to third is hot.


What does common mean on a light switch?

On a single pole single throw there is no common terminal. On a single pole double throw it is the terminal that is common to both the top and bottom terminals. The "hot" wire is connected to the common terminal so that when the switch is in the up position that terminal becomes energized and there will be no no voltage on the bottom terminal. When the switch is in the down position the bottom terminal becomes energized and there will be no voltage on the top terminal. In relays thisis known as a C form configuration.

Related questions

What type of switch has an on off position with one pole and one contact?

single pole, single throw.


What does SPDT stand for?

Single Pole Double Throw


A SPST switch is an example of what circuit?

It stands for Single Pole Single Throw


Which is best double pole or single pole power socket?

there is no answer a single pole socket is a 120v and a double pole is 240v if you are talking about contactors it is completely up to the appliance but a double pole double throw is just as safe as a single pole single throw contactor, Example a single pole single throw will only disconnect the "hot" wire, not the neutral or ground wire and thus no voltage will pass however with a 240 v circuit a double pole single throw only disconnects one "hot" wire and will still have voltage through the circuit (120 volts not 240 though)and is not as safe as a double pole double throw that will disconnect both "hot" lines so no voltage is in circuit If you need electrical work done and do not completely know how to wire it up to code and be safe in the process hire a professional! >>>ITS WORTH YOUR LIFE<<<


What are the function of different types of switches?

What are Air Force types of ied switches


What else is a single pole switch known by?

This is the typical light switch in your home that controls a single light from a single location. Sometimes you might see it described as SPST or single pole single throw.


What is a SPST?

It is a single contact that can be either on or off. It has just two connections. The typical household light switch is a good example. SPST stands for Single Pole - Single Throw Single Pole = one contact Single Throw = on/off (as opposed to on/off/on, slow/fast/off, etc.)


What is the difference between single pole double throw switch and single pole single throw switch?

US Single-pole switchIn the US, the standard "single-pole" light switch is single-pole single-throw, with only 2 terminals. In the ON position it connects the two terminals, and in the OFF position it doesn't. The standard US "3-way" light switch (used for switching a light from two different switches) is single-pole double-throw. It has 3 terminals (hence the term "3-way"), and it connects one of those terminals to either of the other two, depending on the switch position. There's no OFF position, so the switch has only two positions.


What is a SPST contact?

It is a single contact that can be either on or off. It has just two connections. The typical household light switch is a good example. SPST stands for Single Pole - Single Throw Single Pole = one contact Single Throw = on/off (as opposed to on/off/on, slow/fast/off, etc.)


What is TPST switch?

A TPST switch is an acronym for triple pole, single throw it allows three different sources of current to be switched off with the single throw of a switch.


What does spdt switch stand for?

Single-pole, double-throw. The switch directs a single input to two possible outputs.


What is a DPST switch?

DPST is short for double pole, single throw. Double pole means that the unit contains two identical switches, side by side, and operated by one single toggle or lever. This means that two separate input wires can be controlled by a flick of one toggle. Single throw means that each switch can make or break a circuit; it can connect the input wire to the output, or not. It can't connect to one or other of two output wires, switching between them. A DPDT switch is also used for a disconnecting a 240 volt supply from a 240 volt load. Some other types of switches are Single Pole Single Throw (ordinary light switch), Single Pole Double Throw, Double Pole Double Throw, Triple Pole Single Throw and Triple Pole Double Throw