Wiring Diagram 3 Way Dimmer Switch

Hello readers, welcome to this informative article about wiring diagram 3 way dimmer switch. In this article, we will provide you with a detailed guide on how to install and use a 3-way dimmer switch, along with its advantages and disadvantages. So, let’s dive in!

1. Understanding the Basics of a 3-Way Dimmer Switch

Before we proceed with the wiring diagram, let’s get acquainted with the basics of a 3-way dimmer switch. A 3-way dimmer switch is a device that allows you to control the brightness of a light from multiple locations. It is commonly used in stairways, hallways, and large rooms with multiple entry points.

2. Wiring Diagram for a 3-Way Dimmer Switch

Now, let’s take a look at the wiring diagram for a 3-way dimmer switch. Please refer to the table below for a detailed explanation of each wire:

Wire Color Description
Black Common wire that carries the incoming power
Red Traveler wire that connects the two 3-way switches
Green or Bare Copper Ground wire that provides protection against electrical shocks

In a typical setup, the black wire is connected to the common terminal of the dimmer switch, while the red wire is connected to one of the traveler terminals. The other traveler wire is connected to the corresponding terminal on the second 3-way switch. The green or bare copper wire is connected to the ground terminal.

3. Advantages of Using a 3-Way Dimmer Switch

There are several advantages to using a 3-way dimmer switch:

  • Energy Savings: By adjusting the brightness of the lights, you can save energy and reduce your electricity bills.
  • Mood Lighting: A 3-way dimmer switch allows you to create different lighting effects to suit your mood or the occasion.
  • Convenience: With a 3-way dimmer switch, you can control the lights from multiple locations, providing convenience and flexibility.

4. Disadvantages of Using a 3-Way Dimmer Switch

Despite its advantages, there are a few disadvantages to consider:

  • Compatibility: Not all types of bulbs are compatible with dimmer switches. Make sure to check the compatibility before installing.
  • Price: Dimmer switches are generally more expensive than regular switches.
  • Installation Complexity: Installing a 3-way dimmer switch can be more complex compared to a standard switch.

5. Alternative Wiring Diagrams for a 3-Way Dimmer Switch

If the above wiring diagram doesn’t match your existing setup, here are a couple of alternative options:

  • Using Two Dimmers: Instead of a 3-way dimmer switch, you can use two separate dimmer switches connected to the same light fixture.
  • Using a Smart Dimmer: Smart dimmers allow you to control the lights remotely using a smartphone or voice commands.

FAQs (Frequently Asked Questions)

Q: Can I use LED bulbs with a 3-way dimmer switch?
A: Yes, but make sure to choose dimmable LED bulbs that are compatible with the dimmer switch.

Q: Can I install a 3-way dimmer switch on my own?
A: If you have basic electrical knowledge and experience, you can install a 3-way dimmer switch. However, it is always recommended to consult a professional electrician for safety reasons.


In conclusion, a 3-way dimmer switch offers the convenience of controlling the brightness of your lights from multiple locations. It provides energy savings, allows for mood lighting, and adds a touch of elegance to your living space. However, it is important to consider the compatibility of bulbs, installation complexity, and the cost before making a decision. We hope this article has provided you with valuable insights into wiring diagram 3-way dimmer switch. Happy installation!