Are you planning to install a 2 way light switch in your home? It’s a great way to have control over your lighting in different parts of your home. Here, we will discuss the wiring diagram of a 2 way light switch and how it works. This guide will cover everything you need to know to wire a 2 way light switch on your own without any professional help.
What is a 2 way light switch?
A 2 way light switch is a type of electrical switch that is designed to control the lighting from two different locations, such as a staircase or a long hallway. It allows you to turn the lights on or off from each end of the room, rather than having to go to the original switch to do so. This feature can be very convenient and useful, especially in large rooms or areas.
Before we discuss how to wire a 2 way light switch, let us first explain the two different types of 2 way switches available:
1. Two-Way Switching:
This is the most common type of 2 way switch, also known as a ‘switch loop’. This type of switch is used where the light is controlled from two points, and the electricity is routed through the fixture. The wires from the power source come into the first switch and then the second switch, and finally to the light fixture.
2. Intermediate Switching:
This type of 2 way switching is used when the lighting is controlled from more than two locations, such as in a large room or a stairway with multiple landings. It involves using two or more intermediate switches, which are wired between the two-way switches. This type of wiring enables the lights to be controlled from any of the intermediate switches or from the two-way switches.
What are the components of a 2 way light switch?
The components of a 2 way light switch include:
1. Switches:
There are two 2 way switches involved in this type of wiring. One switch is located at one end of the room, while the other is located at the other end of the room. These switches are identical in appearance and function, and they have three terminals each.
2. Lighting Circuit Wires:
The conductors that connect the switches and the light fixture are known as lighting circuit wires. These wires consist of a live wire, a neutral wire, and earth wire. The live wire carries the electric current from the power source, the neutral wire returns the current to the power source, and the earth wire provides a safety path for any current leakage.
3. Cable Sheathing:
The cable sheathing is the outer protective layer of the wires. It is usually made of PVC or rubber material, and it protects the wires from any damage or corrosion.
How to wire a 2 way light switch?
Now that you have an idea of what a 2 way light switch is and what its components are, you can move on to wiring it. Here is a step-by-step guide to wiring a 2 way light switch:
Step 1: Turn off the Power Supply
Before you begin wiring, make sure to turn off the power supply to the circuit you are working on. This is very important for your safety, and to prevent any damage to the wiring or the switch.
Step 2: Remove the Existing Light Switch
If you are replacing an existing light switch, you need to remove it from the wall box. This can be done by unscrewing the switch plate and removing the screws that hold the switch in the box.
Step 3: Connect the Live Wire
Connect the live wire to the common terminal of the first switch. The common terminal is usually marked with a black or red terminal screw.
Step 4: Connect the Neutral Wire
Connect the neutral wire to the other terminal of the first switch. This terminal is usually marked with a blue or white terminal screw.
Step 5: Connect the Other Switch
Connect the other switch in the same way as the first switch. The common terminal of the second switch should be connected to the live wire, and the other terminal should be connected to the cable that runs to the light fixture.
Step 6: Connect the Light Fixture
Connect the light fixture to the cable that runs from the second switch to the light fixture. The live wire should be connected to the live terminal of the light, and the neutral wire should be connected to the neutral terminal of the light.
FAQs
1. How do I know which wire is live?
The live wire is usually colored red, brown, or black. However, it is always best to use a voltage tester to verify which wire is live before working on it.
2. Can I install a 2 way light switch on my own?
Yes, you can install a 2 way light switch on your own, as long as you follow the wiring diagram and take the necessary safety precautions. However, it is always recommended to seek professional help if you are unsure about your abilities.
3. What is the purpose of an earth wire?
The earth wire provides a safety path for any current leakage to prevent electrocution or electrical fires. It is usually colored green or yellow and is connected to the metal casing of the light fixture.
4. What is the difference between a two-way switch and a dimmer switch?
A two-way switch is designed to control the lighting from two different locations, whereas a dimmer switch is designed to adjust the brightness of the lighting. Dimmer switches can also be used with two-way wiring.
5. Should I turn off the power supply before replacing a light switch?
Yes, it is always important to turn off the power supply to the circuit you are working on before replacing a light switch. This is for your safety and to prevent any damage to the wiring or the switch.
Conclusion
Wiring a 2 way light switch can seem daunting at first, but it is actually quite simple once you understand the basics. By following the steps mentioned in this guide, you can wire a 2 way light switch on your own without any professional help. Always remember to take the necessary safety precautions when working with electrical wiring, and never hesitate to seek professional help if you are unsure about your abilities.
