Questions tagged [transformer]

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

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1answer
38 views

Can I directly add a Common wire to this point on a 24VAC transformer, or will load be too high? (70mA)

Referencing This excellent answer I have a two wire furnace controller, 24VAC, no common. I measured the current draw of the relay (when the thermostat wires are shorted), it draws 0.2A Wish to add an ...
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1answer
57 views

Doorbell transformer wiring to an electrical outlet?

I just bought a new doorbell transformer (24V 40VA), to replace for current one (10V 5VA) because I bought a video doorbell. I'm don't have any experience with electricity but I'm willing to learn (...
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1answer
12 views

run of garden low voltage led's fluctuate from full to half to off and repeat

I purchased and installed 100' of 2/ 16 gauge wire and eight lamps ( LED Lawn Light 12W 2800K AC/ DC 12V) and Malibu’s 200 Watt Low Voltage Transformer. 96 watts of lamps, I was told, would be ...
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5answers
116 views

Why is my florescent transformer buzzing? Is it due to being the wrong voltage?

I am using 230v to 240v fluorescent light transformers for T8 36W 120 cm fluorescent tubes, but I found that the transformers are buzzing. The buzzing should not be happening, even though it is new ...
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0answers
27 views

Nest thermostat + SIMPLE dual transformer setup. What is wrong?

I have a a VERY SIMPLE dual transformer system (Rh is the heating transformer and Rc is cooling transformer) for heat all I need is (Rh + W1) for AC all I need is (Rc + Y1) With this dead simple ...
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1answer
81 views

Setting up transformer for 240 down to 120

I'm using 240 for voltage drop. The load is a receptacle fed from a subpanel. I know the size of the transformer,the fusing I want to use but, need help figuring out how to ground the system. In ...
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1answer
92 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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2answers
578 views

Cover & sound-suppression for doorbell transformer in utility closet

This transformer is installed in the utility closet of a 1970's condo. Notice the wad of cut paper sheets pinched between transformer and the wall plate. This is an attempt at halting a low-tone ...
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2answers
100 views

Can I disable an old security system by disconnecting the transformer?

I switched from my old security alarm to a diy alarm system. I want to completely shut down the old alarm system and keypad. Is I possible to remove the wires of the transformer? I don't know what to ...
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4answers
658 views

Wiring 24V foot mount transformer

I'm adding a 24V transformer for a powered damper for my HRV, which will run independently of the furnace. I picked up a suitable transformer, except it's foot mount and I only just learned I ...
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1answer
94 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 ...
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1answer
231 views

Can I reverse the function of a three-phase autotransformer?

I have one auto transformer that we used to convert 3-phase 380V to 3-phase 220V. Now I need to convert 3-phase 220V to 380V. How to use the same transformer for 3-phase 380V output? Please explain ...
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0answers
11 views

older GE heat pump 24v

What should I be looking at on my old ge weathertron that is popping the 3.6v mini breaker on the transformer ? Sometimes the contactor isnt getting the 24 volts. Also did jumpering the r an fan or r ...
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1answer
29 views

Blown Thermostat Twice and Dead Transformer

A year ago, I had a brand new smart thermostat that caused the A/C fuse to keep blowing. I replaced the thermostat with a duplicate, swapped the fuse out and everything has been fine. Now a year ...
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2answers
143 views

Transformer won't work for US plug

I live in the UK but have a few US appliances in my possession which I would like to use here in the UK. To avoid having to rewire all the plugs, I bought a transformer to step down the voltage from ...
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3answers
84 views

Can I use a variable AC transformer to adjust the output of a radiant heater?

During the winter I use a radiant heater under my desk to supplement the house's furnace, something like this: https://www.amazon.com/Tangkula-Adjustable-Thermostat-Overheating-Protection/dp/...
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2answers
49 views

mounting a power-splitter on a foreign electricity transformer

I'm using a 110V→220V foreign electricity transformer (image attached). Is it possible / safe to mount a power-splitter on the transformer, to allow multiple 110V devices to be connected ...
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3answers
272 views

Why do I have two doorbell transformers?

I'm trying to debug why one of my doorbells isn't working, but to keep things simple, today I'm just trying to understand the reasoning and implications of what I see at the electrical box. Background:...
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1answer
102 views

Is this a correct installation for a doorbell transformer

Transformer originally installed by builder 20 years ago behind the chime box. I'm installing a 16v 30va transformer for a Eufy video doorbell. Can I just replace the transformer as is or do I need a ...
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1answer
32 views

Marine Exterior Lights on Seaside Home

On a residence located about 20 feet from the ocean in a severe weather climate. I am contemplating putting stainless steel well sealed marine lights on the house for some exterior deck lighting and ...
1
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1answer
94 views

Install doorbell transformer on round junction box

Recently installed a Ring doorbell but realized that I need to hardwire a transformer to it. There's no existing transformer, so I'm thinking of wiring the transformer from the front door light (120v)....
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1answer
133 views

Step up-down transformer tripping circuit breaker

I got a 3000watt step down transformer(https://www.amazon.com/gp/product/B07LCSTP24/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1) to power my 1500 watt Ninja blender I got from US to run in ...
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2answers
214 views

Can a doorbell transformer be installed outdoors in a protected location?

We have an outdoor electrical outlet w/ two knockouts. I was going to add the doorbell transformer in there but I couldn't find out if it is code to have the transformer in a dry outdoor place. It is ...
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1answer
160 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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0answers
65 views

Diagnosing doorbell transformer voltage drop

UPDATE: The plot thickens. I measured 2.5V at the door even with the wires completely disconnected from the transformer. So, the transformer is contributing to the voltage difference but not solely. ...
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3answers
2k 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 ...
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2answers
84 views

What Transformer for Smart video Doorbell

I’m wiring a new smart doorbell camera (Eufy brand) It’s intended to replace an existing doorbell, but I don’t have one, so I will be wiring it from scratch. The manual says “make sure the transformer ...
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1answer
89 views

How do I wire a GE oven that requires 110v + 220v in a 220v-only home?

I have GE oven (JB680SP3SS), purchased in 2011. It requires 220v + 110v. The place I was living in had 110 and 220. Last year I moved to another city and the place I live it only have 220v. I ...
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0answers
44 views

Convert 120 V circuit to 12 V by splicing LED driver into existing wiring

My kitchen has a light switch by the sink which operates a pendant light above the sink. I am making a DIY replacement light using a 12 V LED strip and a 4 ft. wooden dowel to be suspended ...
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0answers
26 views

Has anyone dealt with leonlite low voltage ground lights? [duplicate]

I am having trouble with finding the right transformer for a set of 7w led ground lights I bought on Amazon, apparently they are not compatible with Leon lights Any thought?
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3answers
4k views

Doorbell transformer is this it?

I am going nuts trying to find my doorbell transformer. Someone suggested it may be this. But doesn't look like one to me. Is it? If not any suggestions where it may be?
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0answers
122 views

How do I make my doorbell not connected to a light switch?

The transformer for my wired doorbell is connected to a light junction box. The doorbell works just fine if the light (which the transformer is connected to) is turned on using the wall switch. If the ...
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1answer
75 views

Using buck/step up inverters for in-wall ovens

Trying to install an American oven in Japan and I could use some help on the electrical side. I have 200v single phase as well as 200v 3-phase in open-delta configuration, both in 60 hz The oven ...
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3answers
2k views

How wasteful is a voltage transformer?

If an appliance that is rated for 220V is used with a 110v-to-220v transformer in a 110v country, or an appliance that is rated for 110V is used with a 220v-to-110v transformer in a 220v country, how ...
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2answers
1k 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 ...
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1answer
239 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
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1answer
122 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, ...
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1answer
1k 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....
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1answer
93 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?
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2answers
144 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 ...
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0answers
104 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 ...
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0answers
31 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
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1answer
259 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
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1answer
61 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 ...
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4answers
2k 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 ...
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2answers
300 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
6k views

Doorbell button wiring no voltage?

I have just moved recently, and I noticed that the doorbell does not work. So I tried to troubleshoot it myself. I use a multimeter and then connect both probe to the transformer it gives 16V which ...
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0answers
38 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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2answers
4k views

Can I use another brand of LED driver with IKEA lighting?

I'm planning on getting IKEA OMLOPP lighting. However, since I would need multiple Ansluta transformers and they are quite expensive, I was wondering if its possible to use a regular LED driver ...
0
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1answer
317 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....