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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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0
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2answers
67 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..
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1answer
63 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 ...
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0answers
36 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 ...
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1answer
46 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....
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1answer
117 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 ...
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1answer
54 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"). ...
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2answers
64 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
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1answer
47 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
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2answers
87 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
213 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
67 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 ...
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4answers
2k 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
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1answer
60 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
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2answers
1k 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
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1answer
325 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 ...
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2answers
157 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 ...
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0answers
28 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 ...
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3answers
64 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
440 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 ...
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2answers
44 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 ...
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2answers
209 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
351 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
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0answers
146 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
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1answer
78 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 ...
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4answers
80 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 ...
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2answers
100 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 (...
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1answer
692 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? ...
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1answer
85 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 ...
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1answer
107 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
64 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
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2answers
56 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
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3answers
123 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?
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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
38 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
286 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
128 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
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1answer
206 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
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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 ...
0
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1answer
146 views

Transformer location

I've got a very basic question - I have a 120V to 24V transformer https://www.functionaldevices.com/products/building-automation/details/TR40VA040/ and on the transformer surface it calls out "install ...
2
votes
1answer
414 views

Changing old doorbell transformer

I'm replacing an old doorbell transformer. After removing the junction box, I have 3 exposed black wires. I have the new transformer with the typical White, Black, Green wiring, but I don't know which ...
0
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2answers
2k views

Doorbell Voltage Drops at Transformer

All, I replaced my doorbell transformer and got 22V (which was odd since it is supposedly a 16V transformer) with no wires connected to the transformer. As soon as I connect the wires to the ...
0
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0answers
257 views

Doorbell button wire low or no voltage

I have existing wiring for my doorbell that goes from the front door to a closet. No actual doorbell or chime is hooked up, just wiring. When I connect a 24v transformer to the closet end, I'm ...
1
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2answers
191 views

208x240 buck boost transformer putting out ~260v

I recently installed a buck-boost transformer in one of our buildings with 208Y/120v service to support a 1hp submersible well-pump rated for 230v single-phase. The transformer is a GE 9T51B0158 ...
2
votes
2answers
136 views

Is it safe to remove this wall transformer?

I bought a house a bit ago and it came with this plugged into one of the walls. I'd like to remove it as I don't know what it does or if I need it and when thunder strikes the thing makes a noise like ...
0
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1answer
95 views

How can I ground an appliance with a CEE 7/7 plug plugged into a step-up transformer with a “universal” female outlet?

I'd like to use a European appliance (5A 208-240V 50/60Hz 900W) with a step-up transformer such as this one. The appliance has a CEE 7/7 Schuko-French hybrid plug. The transformer has a female ...
0
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0answers
28 views

How well will a machine rated for 120 volts 60 hz work with 120 volts 50 hz?

Moving oversea wanting to know how well my Zaaz Vibration Platform Fitness Machine will work with a transformer that will step down 220 volts to 120 volts with 50hz?
1
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1answer
73 views

can i use a transformer to run an american steam cleaner ( 120v/60hz) on a 220v/50hz

i recently purchased a steam cleaner ( sienna Luna plus) willing to use it in Algeria, but it is designed to be used in the US , the only way i found to transform 220 v 50 hz to 110 v ( i think ...
4
votes
2answers
174 views

What is this unit attached to my house, and what do I replace it with?

I am trying to figure out what this thing is. I assumed it's a bell ring transformer but then it has four terminals on it. Any help is appreciated!
1
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2answers
1k views

Can 1 24v transformer support 2 smart thermostats.

I replaced my old thermostat with a lyric. My doorbell transformed was unused and 16 V. I replaced that with a 24 and wired it directly to my lyric. Everything works great. If I do an additional ...
0
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0answers
24 views

a non working single 10W MR16 in a recessed light (LED)

One of the bulbs is not lighting up. I tried a new bulb and replaced the ceramic bulb holder and that did not help. What am I missing? Could it be a transformer that suddenly went bad? If that is the ...