# What is a 3 pole switch used for?

## What is a 3 pole switch used for?

Three pole or three-way switches are used to control lights and fixture from multiple locations, such as the top and bottom of a flight of stairs A closer look shows that a three pole switch has three terminals, while a single pole switch has two.

What’s the difference between a single pole switch and a three-way switch?

The most common household switch, a single-pole, has two terminals and simply turns power on or off. A three-way switch has three terminals; a four-way has four.

### Can you use a 3 pole switch for single phase?

Yep! 3-way switches can work just fine as a single-pole. You’ll just have a couple of poles open.

Do I need a 3 pole switch?

Single point switching of a 120VAC supply needs only a single pole switch. For switching from either of two locations, use a pair of 3-way switches. For turning on or off a more powerful electrical device on a 240VAC supply, you’ll want to use a double pole switch.

## Why does my 3-way switch only work one way?

The way a 3-way switch works is that there is no On and Off. So, if power is going to the first common and the first switch is Up, then power goes down the top traveler until it gets to switch 2. If that switch is Up as well, then power goes from the Up traveler to the switch 2 common and on to the light.

Is a 3-way switch double pole?

A double-pole switch allows you to control two separate circuits using the same switch, while a three-way switch allows you to control a single circuit from two different locations. A double-pole three-way switch is able to integrate both of these functions into one.

### Will a 3-way switch work if wired wrong?

Finding the common wire: When wiring a 3-way light switch, you’ll need to find the common wire and connect it to the common screw. If you don’t correctly connect this wire, then your lights won’t work from more than one switch.

Is the common wire the traveler?

One screw, known as the common, is a darker color than the others. The other two screws, usually a lighter brass color, are known as the traveler terminals.

## Which wire goes where on a 3-way switch?

The black (line) wire connects to the common terminal of the first 3-way switch. A 3-wire NM connects the traveler terminals of the first and second 3-way switch together. Traveler wires are interchangeable on each switch. The common terminal of the second 3-way switch connects to the light fixture(s).

What does a single pole light switch mean?

A single pole switch usually refers to a single pole, single throw switch (SPST). It is a switch that provides a simple connect or disconnect capability across two terminals. It is commonly used for on/off applications such as light switches.

### What does single pole switch mean?

Single-pole switches are one of the simplest types of switches to control electronic devices. While there are various styles, they typically have on/off markings on a toggle switch to denote whether power is flowing to the device.

What is single pole wiring?

A pole refers to the number of circuits or wires that a switch controls. A single pole will switch one wire by opening, closing, or changing the connection in a single conductor, while a double pole switch will control (by closing and opening) two separate wires or circuits at the same time.

## What is a two pole switch?

Definition of double-pole switch. : an electrical switch having two blades with their contacts for simultaneous opening or closing both sides of a circuit.