How to Wire a Doorbell

Maybe you bought a new doorbell and wish to install it yourself. Or you want to replace a wired doorbell with a ring video smart bell. Wiring the doorbell can be hard, mostly for first-timers.

However, I will guide you on doorbell wiring, and also show you diagrams on how to wire a doorbell perfectly.

Although we have two types of doorbells, wired and wireless doorbells, this guide is on wired doorbells.

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Parts of a doorbell

There are three key parts of a doorbell, they include:

The transformer

Normally, during doorbell wiring, we don’t connect the bell directly to the current.

It is first connected to the transformer, and then to the supply.

The role of the transformer is to step-down the household current from 120V to about 8 to 24V required by a doorbell.

You can install the transformer anywhere in your house, but most electricians install it at the electrical panel, or inside the circuit breaker.

Related post: How to find a doorbell transformer

The doorbell chimes

The chime is part of the doorbell system that houses the buzzer or the bell. It is the part that rings whenever you press the push button.

Push button

This is often installed at the front door, and when pressed, the chime rings.

Tools required to wire the doorbell

The following tools are necessary for doorbell wiring.

  • Multimeter.
  • Power drill.
  • Small level or plum.
  • Toggle bolts.
  • Wire.
  • Pencil.
  • Wire stripper
  • Screwdriver
  • Fish tape
  • Cello tape.

How to wire a doorbell transformer, chime, and push buttons

To wire the doorbell correctly, follow these steps:

1. Locate a power source

Look for where you will connect the transformer. But before connecting, use your multimeter to confirm the circuit has continuous power and is not operated by a switch. Else, it will affect your doorbell when the switch is off.

2. Turn off the power supply and connect the transformer

It is vital that you turn off the power supply before connecting to avoid electric shock.

Connect the wires from the transformer – black, green and white – to the corresponding wires from the power source and secure them with wire nuts.

Related post: How to test a doorbell transformer

3. Mount the bell or chime

Position the chime at your desired location on the wall and plumb it with a level. Using a pencil, mark the location of the mounting holes on the wall.

Fix the buzzer or bell on the wall using toggle bolts often included in the doorbell kit.

4. Mount the doorbell push button

Map out a place on your front door and install the push button. Fix wires at the button terminals and connect one to the transformer, and the other to the chime.

Use another wire to connect the chime to the transformer, power the system, and test run the doorbell.

Doorbell wiring diagrams

Below are common wiring diagrams involving a doorbell transformer, single to double chimes and push-buttons.

Doorbell wiring involving a single chime and a push button.

This is the most common doorbell wiring system you can see. It comprises a single push button connected to a chime and a transformer.

Wiring involving a chime and two push buttons

This doorbell setup has a single chime and two push buttons. You can go for the wiring system if you need two push buttons, maybe at the front and your back door.

Wiring involving two chimes and a push button

This doorbell wiring has a push button and two chimes. You can go for the wiring system if you want the bell ring to be heard in all parts of the house.

Doorbell wiring system involving two chimes and two push buttons

This wiring system has two push buttons, and two chimes.

You can set up the doorbell system if you want doorbells at both doors of your house, and if you want to hear the buzzer ring loudly in different locations of your house.

Frequently asked questions on doorbell wiring

1. Can doorbell wire shock you?

No, it cannot. Doorbell wires are of low voltage, about 18 – 20 gauges and such cannot shock humans. However, the hard-wired transformer uses high voltage. So, always switch off your power supply before working on your doorbell.

how can I identify doorbell wires?

Identifying the doorbell wire is easy. They are usually small, about 18- 20 gauge and its wire often separate from high voltage wires.