Before disconnecting the old wires label them with strips of tape.
Front and back doorbell wiring.
One for the front door the other for the back door.
Located on the central hub of a doorbell chime the doorbell terminals are where the wires from the doorbell push button s and transformer connect to the chime.
If you have hardwired doorbell buttons at the front and back of your house and one of them works you can be sure that the non working button or the wiring connected to it is bad.
F stands from front and is used for the front door bell.
Doorbells are typically wired with 18 gauge wire also referred to as bell wire.
Front for front bell back if there s a back bell and t for transformer.
Connect the input wires on the transformer to the source circuit using the black to black white to white and ground to green method.
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Typically doorbell chimes have three terminals labeled rear trans and front that correspond with each connection.
Terminals on the bell unit are marked front back and trans for transformer.
Mount the new chime on the wall and attach each wire to its appropriately labeled terminal.
The color of the wire doesn t matter.
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Connect the transformer to the top terminal with 16 awg wire.
Adding a second doorbell chime.
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Wiring diagram for a two chime doorbell.
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C stands for common and should be tied to one of screw terminals coming out of the transformer.
A spool of 18 gauge wire is available at hardware stores and home centers.
Wiring for two doors is the same as for one with the transformer hardwired to the 120 volt source from a house circuit.
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The rear terminal is where the rear doorbell push button if you have one connects to the chime.
16 awg wire is a thin gauge of wire that can easily handle the voltage needed to power your doorbell.
One wire from the transformer goes to the trans terminal and one wire from each button goes to either the front or back terminals.
Many doorbell units make two sounds.
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If the old wires aren t long enough splice a short length of 18 gauge wire onto each one.
