The transformer may be a 16 or 24 volt reducing transformer. It supplies power to the bell. There are three terminals, one is a common, one wire from each bell button goes to that terminal. The second wire from the front door goes to one of the other terminals and the second wire from the back door goes to the other terminal. Pressing one button drives power to one bell circuit, the other to the other circuit. It is most probably an alternating current device.
Hope this helps. ----- Original Message ----- From: Art Rizzino To: [email protected] Sent: Monday, May 03, 2010 7:32 PM Subject: [BlindHandyMan] Diagnosing a doorbell I would like guidance diagnosing my house two door doorbell setup. The wiring always looked shaky to me. Today I was coming down out of the attic and my shirt got caught on the door bell wires and pulled them apart. Well I guess this is the time to figure out the system and make better connections than twisting wires together and let exposed bear wires dangle. This is how it was when we bought the house. The front door you hear two tones and the side door there is one tone. I assume each door's button should have two wires coming from it. The doorbell box has four wires in two pairs of two wires. There are three terminals in the doorbell box, the center terminal has two wires one from each set. What is the center terminal, negative or positive? What might be the voltage required to activate one of the doorbells? There is what I assume is an AC to DC transformer included in the system. This little box only has two terminals on it, is this a typically a steady DC voltage supply? What might be the correct way to connect the wires for such a system? Ideas, guidance and suggestions welcome. Thanks. Art [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]
