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Mark
Doorbell Wiring Help
Mark

I'm trying to understand how my doorbell and chime are hooked up so that I can upgrade to a video doorbell. It seems to be an older chime that a previous owner installed because my house is only 20 years old and the chime seems much older. I don't know the manufacturer, but the chime plays a song with 4 tones and has 5 connections, which are labeled C, R, F, S, and T.

I've attached a picture of the chime, along with the diagram of the wiring coming from the chime, transformer, and doorbell. Is there someone who can help me connect the dots (or wires) in my diagram to understand how the components are all connected (and if they seem to be connected correctly)?

Thank you.

Attachment: 
HandyAndyInMtAiry
Re: Doorbell Wiring Help
HandyAndyInMtAiry

Mark,

There is a wiring diagram label right there on the chime body. You did not mention what type, or manufacture of Video doorbell. Every one of them will have a different wiring setup, voltage and even current type. Most require an AC(Alternating Current) transformer. Every normal doorbell is DC(Direct Current). This is the most important item, not the current doorbell chime. The pictures that you sent actually tell nothing, other than you have a front and rear door button. You will most likely need to change the transformer, and possibly solder a diode on the button itself.

You need to purchase one, and then look at that wiring diagram and compare it to what you have. Me personally, I would pull new, larger twisted pair to each door. 18 AWG non-twisted pair is not really the best. And I bet that you will find you have some places where the wires connect that are weak and ready to break. Anytime that you change entire technologies, change everything.

Andrew

Handy Andy In Mt Airy NC

Mark
Re: Doorbell Wiring Help
Mark

Andrew,

Thank you for the suggestions. However, I am not as concerned with installing the video doorbell as I am with simply understanding the current wiring connections and how they are connected. 

For example, in my drawing/diagram, to where does the RED A wire connect? If you or someone else can help me map out how each of these wires are mostly likely currently connected, I would be appreciative.

I should mention that the current doorbell is a lighted button, so it's getting power of some sort.

Thank you, Mark

HandyAndyInMtAiry
Re: Doorbell Wiring Help
HandyAndyInMtAiry

Mark,

All current that is used comes from the transformer. There is no telling where it is located. It is your house, you should know. Find the transformer, there are some conenctions there also. Power from the load side of the transformer goes to the button. The button is a normally open switch, once the switch is made, the circuit is complete, and provides power back to the chime.

There are so many different ways to connect a simple doorbell chime, it is very difficult to tell you exactly. Use an electrical meter, or a toner and wand and chase the wires. You can measure resistance or current to tell you what wire is coming from what location. According to the wiring diagram that is printed on the chime, that wire comes from the load side of the front door switch.

Don't get all hung up on the color of the wire. They may have used the only wire they had available, and connected the same or different colors togther, any where along the circuit. Current does not know the color of the wire it is bring pushed across. The best and most accurate way is to tone out the wire, or measure the resistance to verify. Always start at the transformer, not the chime. The chime is the end of the circuit.

Andrew

Handy Andy In Mt Airy NC

Mark
Re: Doorbell Wiring Help
Mark

Andy,

Thank you for your help. I think I understand the wiring diagram on the chime a bit more. If it is connected in that way, then in my setup, terminal F on the chime connects directly to the doorbell. The other wire from the doorbell connects to one screw (A) on the load side of the transformer. Also connected to screw A is a wire going to terminal C on the chime. The other screw (B) on the load side of the transformer connects to the terminal T on the chime.

Now, why is there a second wire connected to transformer screw A and a second wire connected to terminal C on the chime? Is this because this chime requires power (remember, it plays a long series of tones like a song) and are these connected to accomplish that?

Mark

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