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Questions tagged [transformer]

For questions about transformers, devices which convert alternating current from one voltage to another.

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5
votes
2answers
665 views

exposed doorbell transformer inside a walk in closet

We recently moved into an apartment with the doorbell transformer exposed. The concern is that the transformer has been mounted in a walk-in closet, directly between shelving where clothing should be ...
1
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1answer
22 views

How to attach a doorbell transformer to a plastic junction box?

My son's doorbell isn't working, I'm not getting any voltage, and I traced the wiring to the transformer located in the basement behind a finished ceiling used for a light fixture. I would like to ...
4
votes
1answer
69 views

Where can I hide an AC to DC adapter for cove lighting?

I have a 12'x15' room to which I'd like to add cove lighting. There's a second floor above, so I don't have access from above. I do have an outlet along the wall where I can tap off for 120V power, ...
0
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1answer
81 views

Light and GFCI off 240v well circuit transformer

Due to costs of pulling I decided to try a used transformer as of infrequent usage of the GFCI and more of lighting. I opened the mobile home's 200 amp breaker box at the pole. It has a double breaker ...
3
votes
1answer
87 views

Replacing old doorbell transformer - wiring

This morning I opened up my main breaker box to replace the old doorbell transformer. I thought this would be a straightforward job but didn't account for confusing wiring of the old transformer setup....
1
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1answer
39 views

Doorbell Transformer?

Looking to update our transformer so we can install the Nest Hello. I believe I found it but wanted to verify if this looks correct?
1
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2answers
38 views

Is it ok to split a transformer directly off the wiring from an outlet junction

I am installing a doorbell transformer for a new Ring doorbell and I have an outlet right next to the main box. It would be simple for me to take the existing wiring, branch it and use it for the new ...
0
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0answers
78 views

HVAC: Nest - Yet another 'C' wire question

I have a dual transformer system. At the AC/Blower unit, there are 'R_c', 'Y' and 'G' wires; there's 0VAC between the 'Y' and 'G' wires, and each shows 27VAC to the 'R_c' wire. At the boiler, there ...
0
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0answers
30 views

Tried switching old thermostat with digital one…wasn't working, so switched it back to old one and ir is still not working

I decided to upgrade the old thermostat control for heating/cooling, to a simple non-programmable digital unit. I simply attached the wires to the corresponding terminals in the new unit. After ...
0
votes
1answer
51 views

is the 24v transformer output ~27v normal?

i found my carrier 58pha090-016 furnace had no flame with the igniter on, and exhaust fan running, etc. it kept trying 3 times then stop. i reset the power switch of the whole system, the same cycle ...
2
votes
1answer
40 views

Honeywell TH6320R1004 Wireless Thermostat with Two Transformers

I have a Honeywell TH6320R1004 and am trying to set it up to work with a second transformer (just added a Taco ZVC403 to an existing Taco SR503). The second transformer was needed to power the zone ...
6
votes
4answers
1k views

Replacing a doorbell transformer attached to power extension bar

My doorbell transformer (picture attached) is determined to be dead because the output voltage is zero, while power socket voltage from the junction box is about 122. Thus, the doorbell transformer ...
0
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2answers
127 views

Furnace transformer hot to the touch

Should the transformer be hot when the furnace isnt running? replaced the transformer and it is hot to the touch but not hot enough to burn fingers..
0
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1answer
64 views

South Africa - Helping a layman with connecting multiple strings of lights on one plug

How would I connect 10 x light strings (20 lamps x 3v/0.06w) to one plug the transformers that come with the light sets are Input: 230-240Va.c 50Hz Output: 24Vac 6va Can I just get a bigger ...
0
votes
0answers
37 views

Can I replace my halogen with led? [duplicate]

So, long story short: An Halogen (MR16/GU5.3) light in my bathroom went out and I replaced it with an led light (from Wilko UK, 3 pack). I know nothing of electrics, but thought heck, I should be able ...
0
votes
1answer
104 views

Is my HVAC system one or two transformer based?

I have read Do I have one or two 24V transformers in HVAC control circuit, but as it appears I don't have two geographically separate units for A/C and heating, believe this to be a different question....
1
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1answer
342 views

Installing Ring Doorbell Pro -How to replace doorbell transformer with this setup or bypass?

I am in the market for a Ring doorbell and was googling on how to find a doorbell transformer. I believe I have found it - but it’s attached to the furnace switch. The wires connected to the ...
0
votes
1answer
73 views

'plug-in sequence'

Good Day, I am thinking the opposite from this last entry (JM) but have no background in electrical theory. I have a lot of appliances I plug/unplug w/a little box in-line (I assume "transformer"). ...
0
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2answers
71 views

Line-neutral vs Line-Line same voltage

I have a 3 conductor (Line1, Line2, ground) (240V) wire that goes to a step-down transformer to get 120V. Since the transformer output is 120V between its line1 and line2 and there is no neutral, does ...
1
vote
1answer
74 views

Goodman furnace - C Wire connection

I'm trying to connect the C wire in my Goodman furnace in order to install a new thermostat. I've read all the posts on this forum about this specific issue so my question is whether i'm in the right ...
1
vote
2answers
90 views

Voltage/current stabilizing

I am running a wire 300+ feet. I'll need to place a transformer every 100 feet that would maintain voltage/current, therefore I wouldn't get any drop so that I can maintain 110vac 20 amp. Which ...
1
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3answers
537 views

Doorbell transformer location problem

I need to find my doorbell transformer in order to change it for a more powerfull one (ring pro doorbell). I have opened the chime and i can see the transformer wire going in my basement, i did follow ...
1
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1answer
79 views

How to connect a new C wire

I have a 2 zone, single stage, heat only system with 2 wires running to each thermostat. I'm looking to install 2 Ecobee's; I have a second Honeywell AT72D1683 that I can install if needed and have ...
1
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4answers
4k views

Is it normal for a doorbell transformer to be warm and make noise?

To make a long story short I am in the process of hooking up my ring door bell and I need to follow these instructions: (I want to wire directly to transformer) To my understanding I need to wire my ...
3
votes
1answer
69 views

Low voltage track lighting flashing at low frequency

I have two sets of track lighting on the same switch, and one of the tracks flashes at a low frequency at seemingly random times. Video of the behavior. Some relevant details: The two tracks are on ...
2
votes
2answers
2k views

Can I wire a doorbell transformer in-wall this way?

My current under-powered doorbell transformer is in a very awkward location (old home, etc.) and in a location where several old wires are cable-nutted together and I would rather not replace it there....
1
vote
1answer
475 views

What terminal to use on AC for C wire / nest dual transformer install

So i purchased a nest gen 3 and proceeded to install it. This is on a dual transformer system, separate boiler and AC system. The good news was i had a unused G wire on the Heat side that I was going ...
0
votes
2answers
357 views

Running 12V Wire Behind Walls for a LED Stair Light?

I'm interested in lighting a stairwell in my house using a red LED strip. I have a nearby AC outlet and plan on using a typical 12V power supply from the AC outlet. I know that class 2 wire is ...
0
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0answers
31 views

Doorbell transformer

I have a doorbell camera that stop getting power I changed the older transformer I test the transformer with my multimeter and it does not read any volts when touching both terminals when I touch one ...
0
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3answers
136 views

Switching wiring from one transformer to another

I am considering getting a Nest Hello doorbell. The requirements state: Nest Hello needs to be powered by wires delivering 16 - 24 V AC, and at least 10 VA (in North America) I had a brief look ...
1
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1answer
670 views

Doorbell dings, dongs, but doesn't ding-dong

I'm replacing a doorbell chime unit. The old one worked, but the new one does not. If I connect the wire to the terminal labeled "front", it will ding. If I connect the wire to the terminal labeled ...
0
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2answers
48 views

GFCI burned out during low transformer outage

About a year ago, we had a large low transformer fire on our block in Brooklyn, NY. That's according to ConEd response team. Before and during the fire which lasted few hours, voltage has been ...
0
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2answers
425 views

Ring Doorbell w/ Digital Chime

I purchased a ring doorbell 2 for my sister for Christmas. I am pretty tech savvy and offered to install it for her last night. I went through the instructions several times but I was not able to get ...
1
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1answer
760 views

Is this my doorbell transformer?

Is this the transformer for my doorbell? It is located in the furnace room, but it looks like it is connected to the furnace. I am just wondering because I have been searching for the transformer and ...
2
votes
0answers
196 views

Extremely old doorbell transformer filled with black gunk?

I need to replace my doorbell transformer in order for my Ring video doorbell to consistently have sufficient power. After searching long and hard I finally located the transformer, which appears to ...
0
votes
1answer
105 views

Furnace getting power, but heat/AC not kicking on. LED on board is not lighting up. Thinking the transformer is gone

So far I've been successful in maintaining and repairing my own HVAC system in my house. First week we bought the house (we knew going into the purchase) I replaced the main board. It's been golden ...
1
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4answers
82 views

Would a transformer protect a 24V digital flow meter if it received 48V?

I purchased a new water softener for the house. It has a digital flow metering device. It worked great for a few days and then stopped working. Long story short, I finally figured out that the outlet ...
0
votes
2answers
121 views

Do they make 24v transformers that have individual terminals for up to 4 thermostats? [closed]

I have two ecobee 3 thermostats sharing a 24v transformer. I'm about to buy two more. Do they make 24v transformers that have separate pairs of terminals for each thermostat? This is not a question (...
0
votes
1answer
928 views

What is that burning smell in transformer?

When I plugged in a 250VA load to the left transformer. I can smell something burning and the case is super hot. What causes the burning smell? What part of transformer can produce burning smell? ...
0
votes
1answer
86 views

Temperature Increase of Sealed Enclosure

I have a sealed metal enclosure of size 20inches x 13 inches x12 inches. A 500W isolated transformer with about half the load producing constant 51 Celsius will be put inside. How do you compute ...
0
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1answer
131 views

How Hot is your Transformer?

I got this Hammond 500VA Isolated Transformer. It's 500W capacity.. and I'm only using 30W. How come the temperature already reaches 50 Celsius (122 Fahrenheit)? How about you? What temperature did ...
0
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1answer
69 views

Stepping up 240v to higher voltage.

My ac system is 240V. I want to step it up to higher voltage to plug in some temporary equipment that needs at least 400-440 volts. If I use a 120v-240v step up transformer.. would it make my 240V ...
-1
votes
2answers
59 views

Lifetime of an autotransformer

In your experience (and in the literature), how many years is the lifetime of typical step-down autotransformer before the primary winding shorts and the full voltage of the primary gets to the ...
1
vote
3answers
157 views

Using 230V-115V Transformer for 240V supply

What would happen if your ac power system uses 240V and you are using a 230V-115V step down transformer? Would it degrade the winding faster? Why is there a 230V-115V ac? what countries use it?
0
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1answer
84 views

Why are leads of primary and secondary plugs in step down transformer shorted?

In the image above, one of the leads in the primary plug of the 220v-110v step-down transformer has continuity with all the leads in the secondary outlet lead using a tester (see arrow in blue). I'm ...
1
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1answer
39 views

Transformer core size and breaker size

Without an isolation (or step down) transformer. Your 20 ampere circuit breaker can happily trip when oven hot wires touches ground by using proper hot, neutral and grounding wire sizes. No problem ...
2
votes
2answers
492 views

Electric Garage heater contactor failure

I own a Fahrenheat FUH724 (7500 watts) electric heater for my 2 car, uninsulated garage. I installed this unit 12/2017 along with a Nest thermostat. An Aube rc840t-240 relay was used to step down the ...
1
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2answers
154 views

Cables in attic with no power

There is one cable with exposed wires. A voltage tester does not detect anything. Another cable goes into a junction box for the doorbell transformer. The cable in the junction box also has no power. ...
0
votes
1answer
261 views

Is this a doorbell transformer? How to test if faulty?

My doorbell has stopped working. I am trying to test each of the components using a multi-meter. However, the wires seem to go through the ceiling etc, so I can't trace where they are going or what ...
1
vote
0answers
32 views

Box mounting point

What are the chances of this setup passing an inspection? 4x4 box is mounted on a stud, relay attached to the bottom 1/2 knockout, transformer will be mounted at the front of the box. This is in ...