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Can a double pole single throw light switch be used as a disconnect for a motor?
Wiki User
∙ 9y ago
Motors have a large start-up current and represents an inductive load. Accordingly, any device used to switch the motor must be capable of handing and breaking currents without any resulting arcing damaging the switch contacts. Therefore, even fractional-horsepower (<1000 W) motors, must be controlled using 'contractors' -i.e. heavy-duty, electromagnetically-operated, switches. Furthermore, it's dangerous to control a motor from devices without 'no volt' protection -i.e. a switch that will not allow the motor to restart by itself following the restoration of a power failure.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoYes, it can be used. In fact it is preferred on 240 volt motors as the switch will open both "hot" legs of the motors supply voltage.On 120 volt motors the switch can also be used but just use one side of the switch. The neutral leg does not get switched. There is an electrical code rule about not opening neutral conductors.
The correct way to switch single phase motor loads is with a manual fractional horsepower switch. It has a melting alloy overload heater that is sized to the motor's full load amperage. If the motor overloads the switch will automatically disconnect the line supply voltage and stop the motor.
An example of one of these switches is Model # 2510FG1P made by Schneider.
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What is the use of SPST in experiment?
A single pole single throw switch (SPST) is used to open or close a contact to a single wire. It can be used as an on/off switch for an appliance or for a light bulb.
What are the advantages and disadvantages of a double pole circuit?
A double pole switch can be used in either a 240V application where you'll need to disconnect 2 "hot" lines, or it is useful when switching a light from 3 different switches. Disadvantage? I suppose it could be a little confusing to face all those contacts on a double pole switch.
How can you make music come on with a light switch?
You can make music come on with a light switch the same way you can make a light bulb come on - plug a radio into the switched outlet.
What is an example of a capability push and opportunity pull in the entrepreneuiral world?
a slot 1/2 "x1" cut into a 2" square of cardboard is held so the slot engages a household light switch as you push up the cardboard the switch is actuated to turn on the light and as you pull down it turns off the light. Typically a long carboard handle is part of the appatatus so that small children can actuate a light switch and a slotted cardboard holds the handle against the wall directly below/under the light switch.
What is causes which makes the EPC light switch ON?
what causes the EPC light or messasge to appear on mercedes s320 1995?
How do you replace the backup light switch for 1990 Mazda Miata?
The backup light switch is located on the left side of the transmission. Disconnect the switch connectors, then unscrew the switch.
You want to disconnect your outdoor lighting that is on a movement sensor to just a regular offon type switch how do you do that?
There should be a switch on the light itself to disconnect the sensor.
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.
Where does the neutral wire go on a single pole switch?
Unless the switch has a light to indicate the switch is turned on, there is no neutral connection to a single pole switch.
What is the difference between double pole and triple pole?
A single-pole switch is an on/off switch that switches a single wire such as the circuit to your overhead light. A double pole switch is also an on/off switch that switches two wires. You would use this to switch as 240 volt circuit (which requires two hot wires) or if you had two circuit you wanted to switch at the same time. I've used them when I had two large light circuits that required two breakers that I wanted to switch with one switch.
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 the difference between single pole switch and a three way?
A single pole switch controls a light or outlet at one location. A 3 way switch controls a light or outlet from 2 locations.
Single light switch you want to put in a double for your fan and light how do you do it?
You have to pull a new wire. There is no way to do it with the existing wire, at least no way you should do it and be in code.
What is a single word synonym for light a switch plate?
Cover
How do you disconnect brake light switch on 95 Toyota tercel?
Disconnecting the brake light switch requires crawling under the steering column of a vehicle. The brake switch is placed behind the brake pedal and the clip for the switch will be on top. Simply unplug it.
Explain why a light switch makes a light go on and off?
A light bulb is wired up to have a current run through it to produce light light. when you disconnect the wire to one end of the light bulb there is no longer a current flowing through it and the light go's out. A switch is a device that is able to disconnect or connect the wire. or otherwise put cause a break in the wire so that power will not run through it.
What does SPST mean?
A single pole single throw switch (SPST) is used to open or close a contact to a single wire. It can be used as an on/off switch for an appliance or for a light bulb.
