What is a 2-way switch? Application and how to connect 2-way electrical switch

The electric switch is a common device in every home. Besides the 1-way switch, there is also a 2-way switch with a more complex structure. The following article lassho.edu.vn will share with you what is a 2-way switch? Application and how to connect 2-way electrical switch.

What is a 2-way switch?

2-way switch is also known as reversing switch or 3-pole switch. The 2-way switch has a 3-pin structure, corresponding to 3 poles connected to the wire (1 dynamic pole, 2 static poles) to transfer current.

2-way switches are divided into:

• Single 2-way switch
• Double switch
• Triple switch

The 2-way switch is a great invention of Thomas Alva Edison. This switch solves the inconvenience of not being able to turn on or off a light bulb in the opposite direction of a 1-way switch.

Working principle of 2-way switch

When current appears, there will be one common pole input and 2 output terminals. Only one output terminal is connected to the input terminal at a time and makes the lamp light.

Compare 2-way electrical switch and 1-way switch

1-way power switch is commonly used in civil electrical systems. This type of switch includes 1 control switch, 1 light bulb with 2 wiring terminals.

A 1-way electrical switch connects to a light bulb to switch the on and off direction in an electrical circuit that shares a switch.

Compare 2-way switch and 1-way switch:

2-way switch	1-way switch
– More complex design, more convenient. – There are 3 poles. Includes 3 types: Single 2-way switch Double switch Triple switch – The design of the switch is different, but the 3-pole circuit system is connected inside.	– Used to light up and open in 1 space. – There are 2 poles. – Only match to meet the direction of turning on and opening once.

Application of reversing switch

The reversing switch has a rather complicated design that makes wiring difficult. However, this type of switch has many convenient applications and is superior to the 1-way switch.

2-way switches are often used to control turning on and off a light bulb in two different locations such as stairs, bedrooms, floors in the house, or rooms in an apartment. . The application of the reversing switch helps users save effort and travel time compared to turning on and off the light bulb in a fixed position.

Installation diagram of reversing switch

Prepare equipment to connect 2-way switch

To install the reversing switch, you need to prepare:

• 2-way switch
• Light bulb
• Wire

How to connect 2-way electrical switch

A civil electrical circuit will have two wires, a phase wire (fire wire) and a cold wire (neutral wire). The neutral wire will be connected directly to the light bulb.

Method 1: This is a fairly common way to run a complex power cord, connected to the control circuit and the load of the electrical switch. However, this method is quite wasteful and consumes a lot of electricity.

Method 2 : Connecting electrical equipment to the auxiliary control circuit and the load of the switch, using phase wire.

This way works on the principle that when there is a current, there will be a voltage difference . Therefore, when the two ends of the device are 2 phase wires or 2 neutral wires, no current flows through the device, which increases the durability of the device and significantly reduces power consumption.

Note when installing 2-way electrical switch

When installing a 2-way power switch, you need to note:

• Choose to buy good quality 2-way electrical switches, ensure safety.
• Learn carefully how to install to ensure safety because 2-way electrical switches are quite complicated.
• The switch should be installed in the most convenient position, making it easy and convenient to turn on/off.
• Do not install in wet places, which may come into direct contact with water such as in the bathroom or outdoors. You can choose a 2-way switch that is water and moisture resistant for safety.
• Regularly check 2-way power switches and power lines during use to promptly detect problems.

Above is an article to share with you information about 2-way switches. If you have any questions, leave a comment below!