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The wall switch is one of the most basic - yet most important - electrical devices in the home. There are several different types of switches, and although they may look the same when they are installed and their faceplates are on, the various switches can function quite differently. All of the common types of switches come in different styles, such as toggle, rocker, slider, or push-button. The style usually has no effect on the switch function and wiring.

Single-Pole Switch

The single-pole switch is the general-purpose workhorse of switches. It is used to control a light, receptacle, or other device from a single location. A characteristic feature of a single-pole toggle switch is that it has ON and OFF markings on the toggle. This is something you will not find on three-way or four-way switches.

A single-pole switch has two brass-colored screw terminals and is wired to the "hot" (current-carrying) wire, which is usually black. One brass terminal is for the incoming hot wire and the other is for the outgoing hot wire to the device. Most single-pole switches also include a ground terminal for connecting the circuit's ground wire.

As a general rule, neutral (usually white) wires are not connected to switches. However, sometimes you may see a white wire attached to the switch, and this is when it is functioning as a hot wire. In this case, the white wire should have a wrap of black tape on it near the switch terminal to indicate that the wire is a hot wire and not a neutral wire.

Double-Pole Switches

The double-pole switch is commonly used in industrial applications but can be found in some home wiring systems. Like the single-pole switch, a double-pole has ON and OFF markings and controls a device or equipment from one location. The main difference is that a double-pole switch has four brass hot terminals (instead of two), plus a ground, allowing you to connect it to two pairs of hot wires from a 240-volt circuit.

Double-pole switches are commonly rated for high amps products so they can control higher-demand appliances, motors, and machinery.

3-Way Switches

3-way switches are always used in pairs and allow you to control a light or receptacle from two different locations. These switches have no ON or OFF markings because the on and off positions will vary as the switches are used.

The three-way switch has three terminal screws. The hot wire from the power source connects to the darkest screw terminal marked "COM" for "common." The other two terminals are called "travelers" and are interchangeable. The switch also has a ground terminal.

The trick in replacing an old three-way switch is to mark the wire attached to the COM terminal before you remove the old switch. Since the other two are interchangeable, you can't get them wrong. If there is a white wire connected to a traveler terminal, it should be labeled with black tape to indicate it is hot.

4-Way Switches

The four-way switch is used in between two three-way switches to provide control for an outlet or light fixture from three or more different locations. If you want to have control from more than three locations - say five locations - you would still use two three-way switches (one on each end) and three four-way switches in between the two three-ways.

The four-way switch looks similar to a double-pole switch, except it has no ON or OFF markings. It has four terminals (plus a ground), usually brass-colored. There is no COM or "common" terminal, as in a three-way switch. The four-way switch simply functions as a switching device for the traveler wires between the three-way switches.

Light Switch (Single-Pole Switch)

Different from the similar products on the market, our Yoswit Smart Light Switch is the only product on the market that could work with both with (2-Wire) or without neutral wire (3-Wire), meaning that it does not require any rewiring or redecoration.

Because our product is compatible with traditional wiring, the installation process is very easy and simple. Simply replace your traditional wall switch with our Smart Light Switch, then your smart home is all set.

Dimmer Switch

The Yoswit Smart Dimmer Switch support both TRIAC and 0/1-10V dimming in one switch, and it’s also 2-wire and 3-wire compatible. Just simply change the wiring and select the dimming type through our App, then it can fit different dimming solution.

No matter it is an incandescent, dimmable LED or dimmable CFL, our universal dimming controls offer superior functionality to effectively dim leading edge, trailing edge and dimmable led without sacrificing performance.

Cooker Switch (Double Pole Switch)

Yoswit Smart Double Pole Switch is the only product on the market that could support appliances up to 20A. So this product is ideal to use with high voltage appliances such as water heater, air-conditioner, and exhaust fan.

Each of Yoswit Smart Double Pole Switch is equipped with a built-in timer, you could schedule the operation period of your appliances from weekly to even minutes according to your needs. The switch will memorize and operate the schedule independently even when disconnected with your phone.

3-Way Switch

The Yoswit 3-Way switch is not only compatible with traditional wiring, but also the compatible with the traditional mechanical 3-Way switch. The installation process is very easy and simple. Simply replace your traditional wall switch with our Smart 3-Way Switch, then your smart home is all set.

With the highest compatibility on the Bluetooth Smart Switch market, our product supports all common types of light bulb, from incandescent to LED. And support low Watt LED down to 3W under 2-Wire wiring.

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