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Doorbell Wiring
Doorbell Transformer
Doorbell circuits use a doorbell transformer to convert 120V to a low voltage. A doorbell transformer is usually mounted in a knockout hole in an electrical box. Find Doorbell Transformers
Doorbell Transformer Output Voltage
The output of a transformer with 2 low voltage terminals usually has an output of 16V. This is the most common transformer for older door chimes.
Video support is available on transformers with 3 low voltage terminals. Voltage outputs are 8V, 16V, and 24V.
Doorbell transformer voltage output depends on which terminals the 2 doorbell wires are connected to. The above voltage connections are typical, but verify connections before attaching wires.
Doorbell transformer mounted in knockout hole of electrical box
Doorbell Wiring Diagrams
These diagrams show line voltage connected to the primary of a transformer inside of an electrical box. The low voltage red doorbell wire connects to the door chime and each doorbell button. The white doorbell wire connects together and to each switch.
Wireless Doorbells
If you want to add a doorbell in a location where doorbell wiring doesn’t exist, a wireless doorbell is the way to go. It can be difficult to add doorbell wiring to an existing dwelling. Find Wireless Doorbells
A wireless doorbell button is usually battery operated and the chime usually plugs into a 120V outlet.
Doorbell buttons can be sold individually for compatible doorbell chimes, or in a set combined with a chime.
Video Doorbells
Video doorbells have a built-
You can view videos on a phone, tablet, or computer. Video doorbells have a wireless connection to the WiFi network and are accessed through their app. Video doorbells can be connected to a chime using existing wiring.
Charging a Video Doorbell
Video doorbells usually can be removed from their holders and charged with a USB connection to power.