Nest Doorbell Wiring Diagram: A Comprehensive Guide to Installation

Hello readers! If you’re looking to install your Nest doorbell and in need of a wiring diagram, you’ve come to the right place. In this article, we will provide you with a step-by-step guide on how to wire your Nest doorbell for a seamless installation process. Let’s dive in!

1. Understanding the Basics of Nest Doorbell Wiring

Before we get into the specific wiring diagram, it’s crucial to understand the basics. The Nest doorbell requires a constant power supply to function properly. Therefore, you need to ensure that your existing doorbell wiring is compatible and provides the necessary voltage.

One of the key advantages of the Nest doorbell is its ability to connect to your home’s existing doorbell wiring, eliminating the need for battery replacements. However, this also means that proper wiring is essential for optimal performance.

2. Step-by-Step Wiring Process

Now that you have a basic understanding, let’s proceed with the step-by-step wiring process:

Step 1: Turn off the power supply to your doorbell system from the circuit breaker.

Step 2: Remove your old doorbell button and disconnect any existing wiring.

Step 3: Identify the wires coming from your transformer. Generally, they are labeled as “R” for power and “C” for common.

Step 4: Connect the “R” wire to the “RH” terminal on your Nest doorbell.

Step 5: Connect the “C” wire to the “C” terminal on your Nest doorbell.

Step 6: Attach the remaining wires from your doorbell system to the corresponding terminals on the Nest doorbell. These may include wires for your doorbell chime and front/back door triggers.

Step 7: Once all the connections are secure, turn the power back on and test your Nest doorbell.

3. Advantages of Nest Doorbell Wiring

Wiring your Nest doorbell offers several advantages:

a) Continuous Power Supply: By connecting to your existing doorbell wiring, your Nest doorbell will have a constant power supply, eliminating the need for battery replacements.

b) Integration with Chime System: Proper wiring allows your doorbell chime to work seamlessly with the Nest doorbell, ensuring you never miss a visitor.

c) Improved Functionality: Wiring enables advanced features such as continuous video recording, motion detection, and remote access through the Nest app.

4. Disadvantages of Nest Doorbell Wiring

While wiring your Nest doorbell offers numerous benefits, there are a few drawbacks to consider:

a) Complex Installation: Wiring the doorbell may require technical knowledge and expertise. If you’re not comfortable with electrical work, it’s recommended to hire a professional.

b) Compatibility Issues: Some older homes may have incompatible wiring systems. Ensure your existing doorbell wiring is compatible with the Nest doorbell before proceeding with the installation.

5. Alternative Wiring Options

If you’re unable to wire your Nest doorbell using the existing doorbell wiring, there are alternative options available:

a) Plug-in Adapter: Nest offers a plug-in adapter that allows you to power your doorbell using a standard electrical outlet. This option eliminates the need for wiring but provides a reliable power source.

b) Battery Power: If wiring is not feasible or you prefer a wireless setup, the Nest doorbell can also be operated using batteries. However, this option may require frequent battery replacements.

6. Nest Doorbell Wiring Diagram Table

Wire Color Description Nest Doorbell Terminal
Red Power (from transformer) RH
White Doorbell Chime CHIME
Green Front Door Trigger FRONT
Blue Back Door Trigger BACK
Black Common (from transformer) C

7. Frequently Asked Questions (FAQ)

Q: Can I install the Nest doorbell myself?

A: Yes, the installation process can be done by yourself, but it’s important to follow the provided instructions carefully and ensure your safety by turning off the power supply before starting.

Q: Can I use the existing doorbell wiring from my old doorbell?

A: In most cases, yes. The Nest doorbell is designed to work with existing doorbell wiring systems. However, it’s essential to check compatibility and ensure proper voltage before proceeding with the installation.

Q: What if I don’t have existing doorbell wiring?

A: If you don’t have existing doorbell wiring, you can use the plug-in adapter provided by Nest or opt for battery power.


In conclusion, wiring your Nest doorbell is a crucial step for its proper functioning. By following the provided wiring diagram and instructions, you can enjoy continuous power supply and seamless integration with your home’s existing doorbell system. Whether you choose to wire it or explore alternative options, the Nest doorbell offers a range of features that enhance your home security. Happy installation!