Can a doorbell transformer sit loose inside main panel?


Inspect the wiring

Photo 1: Wire repair

Inspect the wires for damage. Repair breaks with twist-on connectors. Splice in new wire to add length and allow for connections.

A complete inspection of doorbell wiring is usually impossible, since most of the wire is hidden inside walls. But some wire is visible in every home, and that’s usually the stuff that gets jolted loose or broken. Inspection takes only a minute. You may find a few inches of wire exposed near the transformer or several yards running through an unfinished basement. Doorbell cable consists of three or more thin wires inside a plastic sheath (Photo 1). Look for areas where the sheath is damaged and also for pinched or badly kinked sections. Sometimes the only way to tell for certain whether wires inside the sheath are damaged is to carefully slice open the sheath with a utility knife. If you find broken wire, strip the broken ends and rejoin them with wire connectors. Often there’s not enough...

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Doorbells have several electrical components that allow them to work. From the button to the chime to the transformer, all of these need to be connected and working for the doorbell to sound. Removing or disconnecting any of these pieces will effectively disable any doorbell. This procedure applies to wired doorbell systems. If you have a wireless system, simply removing the battery will disable it. Virtually anyone with a screwdriver can accomplish this task.

Turn off the breaker that supplies the power to the doorbell. In most cases, the breaker will supply other receptacles or switches for lights or other appliances. If this is a dedicated breaker switch for the doorbell only, flipping the breaker to the "Off" position will disable the doorbell until the breaker is flipped on again.

Remove the doorbell button. First, make sure the breaker that supplies power to the unit is off. Use a noncontact circuit tester to ensure that no electricity is flowing to the...

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Ding, dong! Your guests have arrived for dinner and drinks. But if your doorbell stops working, you could leave your invitees out in the cold—extremely frustrating for both you and your guests. And if it’s not expected visitors, it’s a delivery service. A malfunctioning doorbell could make you miss FedEx or leave you with valuable packages just sitting there, outside your front door for anyone to grab.

Doorbells are often taken for granted, because these durable units can last 10 years, 15 years, or more without ever experiencing a glitch. But an outdoor location means that these electrical devices are exposed to all of the elements: broiling sunlight, rain, snow, sleet, and wind, to name a few. Any one or combination of these natural forces can cause a functional decline or outright failure. Before you call in a contractor and replace your entire doorbell system—a pricey proposition—take a few minutes to troubleshoot some of the most common...

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Disable electricity. Make sure that circuits that supply electricity to the old doorbell and chime are turned off. To make sure, use a circuit tester to check for the presence of any power in the device.


Remove the old doorbell switch. Remove the cover and use the screwdriver to detach the old switch from the wall. Pull the detached switch away from the wall and expose the wiring running from the back of the wall plate and into the hole behind the plate. Wrap the wires with a short length of electrical tape, and apply a section of the sticky tape surface to the edge of the open hole to prevent the wires from sliding back into the wall.


Connect the wires to the new switch. Remove the cover from the new button, and thread the wires through the base of the unit. Wrap the ends of each of the wires to the positive and negative terminals, and use the screwdriver to secure the wires into position


Attach the new doorbell...

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Checking a doorbell transformer is the easy part; sometimes just locating it can be the real challenge.

A conventional doorbell has wires that connect the chimes or bell to the transformer, which reduces standard voltage to low voltage.

Sometimes finding a doorbell transformer is a challenge. It may be located inside the chimes or bell enclosure but often is located elsewhere.

If you know where the doorbell wires run, trace them back to find the transformer’s location. Newer homes often have doorbell transformers conveniently located in plain sight, high on a garage wall.

Sometimes it’s mounted on a floor joist in the basement, below the doorbell, in a closet, in the attic (possibly buried under insulation), or in a crawlspace. Or, it may be located inside an electrical box, near the electrical panel or the doorbell.

The proper voltage rating should be stamped on the transformer and/or the doorbell mechanism.

To check the doorbell...

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In just a few days, hundreds of kids will be coming to my house in costumes, and they’ll all be ringing my doorbell. It’s the week before Halloween. During the ten years I’ve lived at this house, my doorbell has died on me twice already – and now it’s dead again.

Replacing a doorbell isn’t terribly complicated, but given the repeated failures I’ve had it seemed a good idea to really check on everything more carefully than I’d done in the past. This summary won’t cover every nuance associated with every type of doorbell, but it will illustrate a fundamental approach for troubleshooting and replacing only those components that really warrant replacement.

I had a conventional wired chime doorbell – this is your “ding-dong” type of system as opposed to an electronic doorbell that may play various songs. The basic principles below can apply to both, though, and I’ll distinguish below where things may differ. In fact, I ended up replacing my chime system with an electronic...

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This article started as a short and simple doorbell wiring tutorial, and we’re definitely going to display various doorbell wiring diagram configurations in clear detail at the end of this article, but our research and testing led us to the conclusion that there is much more to know about a doorbell system, so we’ll go into those specifics as well.

From past to present the common 2-note door chime has remained a simple setup. There are three main component stages and we discuss the relevance of each stage and how all the parts work together to create a chime sound when the doorbell pushbutton is pressed.

The Broan-Nutone company, and more specifically the NuTone chime and transformers have a deep history in the doorbell market and may very likely exist in many home applications. You’ll see this brand referenced throughout the article.

Another popular doorbell brand that tops our reference list is HeathZenith, who offer product manuals and helpful how-to videos...

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A well-maintained and correctly operating doorbell is definitely an important part of our homes. However, if the doorbell is not functioning properly or is buzzing with weird and abnormal sounds, then it's time to check if it needs repairs. Replacing it or rectifying the faults doesn't require great electrician skills. Majority of homeowners can carry out this task on their own provided they are guided by the right set of instructions and safety tips.

Warning: Although your doorbell may use a very small voltage, the transformer is connected to a 120V house wiring system. So, ensure that you have cut off the main power supply and have taken all the necessary precautions. It is safest to cut off the main power supply of your home.

Problems Encountered

Due to constant wear and tear of the components of the doorbell, its wires may become loose and the buttons may stop functioning. Sometimes the power to the circuit might fail or being constantly exposed to the...

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Wiring for extremely wet conditions
Armoured cables with two rubber-insulated conductors in a flexible metal sheath were used as early as 1906, and were considered at the time a better method than open knob-and-tube wiring, although much more expensive.
The first polymer-insulated cables for building wiring were introduced in 1922. These were two or more solid copper electrical wires with rubber insulation, plus woven cotton cloth over each conductor for protection of the insulation, with an overall woven jacket, usually impregnated with tar as a protection from moisture. Waxed paper was used as a filler and separator.
Over time, rubber-insulated cables become brittle because of exposure to atmospheric oxygen, so they must be handled with care, and are usually replaced during renovations. When switches, outlets or light fixtures are replaced, the mere act of tightening connections may cause hardened...

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The following is a compilation of reports from the US , Australia and Canada about fires, explosions, electrical problems or burned out appliances due to Smart Meter installations. For a summary of the problems, read this:


10/27/2017 DISCOVERY BAY, CA A big rig accident caused a power surge, which caused some smart meters to explode. “We heard it from inside the house and the pieces, they look like they went 8 to 10 feet.” “All of a sudden, all the electrical outlets started popping and fire was shooting out of one of them,” said a resident. 2900 customers lost power.


If your home is having electrical problems it could be smart meter related, and your home could be at risk for a fire. This video is mainly about the difficulty in opting out of a smart meter in Texas, however it also explains how the health and electrical...

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