Questions tagged [transformer]

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

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1answer
94 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 ...
2
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2answers
128 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 ...
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0answers
27 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?
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1answer
69 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 ...
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2answers
173 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!
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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 ...
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0answers
23 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 ...
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0answers
2k views

Fixing constant humming from mechanical doorbell with video doorbell ringers (ring/skybell)

We have an old house with a neat mechanical doorbell. The bell is one of the hammer/bell kinds. I've installed 2 video doorbells which have been powered by this just fine. I tried to add a 3rd but ...
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2answers
233 views

Will transformer operate a door bell/chime 200ft away?

I want to install a doorbell with two bells and one button so it can be heard in two places. One location is within 25ft of the button. The other is about 200ft from the button. Will the transformer ...
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2answers
126 views

How can I measure the voltage of 40A transformer?

I need to power 10 meters of 5V LED strip, for which I bought a 40A transformer on AliExpress. Now, as much as I believe that cheap stuff bought from China can be okay quality, I'd like to make sure ...
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4answers
318 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
354 views

Is the control wiring for my boiler reversed?

I've been diagramming my boiler wiring so that I can understand it before installing a Tekmar 256 external reset. What's been throwing me for a loop is that it looks as if the 24v common is being fed ...
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1answer
700 views

Can I buy a 24v transformer with a dedicated common c-wire feed?

I have an oil furnace that feeds hot water to baseboard in four zones in my house and also to a hot water tank for tap water. There is a 24vac transformer with two output wires that feed power to the ...
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0answers
100 views

Does anyone know what this transformer block is for?

I have just moved into a new flat and mounted on the wall outside the bathroom is a white box. Inside the white box is a transformer and a circuit board. Can anyone help me identify what the purpose ...
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1answer
55 views

HVAC system electric diagram help

I am trying to revive an old three phase 5HP HVAC system so I took a look at the 25 years old electrical system digram and came across 3 three sections which I could not understand completely (I am ...
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1answer
1k views

Why is my control panel for AC/Furnace not working when the fuse is ok?

So a few weeks ago I replaced my thermostat with an ecobee3 smart thermostat. In the process of wiring the thermostat I blew the 3A fuse up in the attic and had to replace the fuse. The thermostat ...
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2answers
324 views

Why does my photo sensor activate during the day?

Our home has a Malibu 300 watt transformer for landscape lights. The lights are on during the day. I have checked the photo sensor and have replaced it but the lights keep coming on regardless of ...
2
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1answer
71 views

Can I convert a 12 volt DC device that uses a 240v transformer, back to 12 volt?

I have a small snack bar/kitchen trailer that I need to convert partly to 12 volt. There is a 12 volt dc water pump 5.2amp and an LED strip light 12volt 5.2 amp - both of these devices currently have ...
2
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1answer
2k views

Can I use a separate 24V transformer with an Ecobee 3 and an Aube relay?

I've purchased an Ecobee 3 Lite smart thermostat which requires 3.5 VA to operate but I'm using an Aube RC840T-240 electric heating relay with 24 V transformer which only provides 1.2 VA. Can I ...
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1answer
3k views

Bathroom light not working but extractor fan is

My bathroom light is not working but the extractor fan via the same cord fitting is. I replaced the cord fitting and checked there's current running through both wires when it is turned on. I then ...
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0answers
556 views

Replaced HVAC Transformer, still have no output voltage

My HVAC stopped working, no matter what state the thermostat is in there is no fan, no compressor, no heat, etc. Using a multimeter, I found that the output voltage on the transformer was 0V. ...
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1answer
1k views

Hook up a light designed for car into a wall socket or battery source [closed]

I'm attempting to hook up the Infrared LED LED Light Bar - 54W to either a wall socket or a battery source. I'd like to know what hardware and what wiring I need to accomplish this. Any embelishment ...
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1answer
538 views

How to connect transformer to outlet for humidifier

I purchased an aprilaire 700, and I plan to install a 15a electrical outlet on the furnace right where the electrical comes in. If I first feed hot wire to outlet, and then feed off outlet to furnace, ...
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8answers
11k views

In wiring a doorbell, what is an alternative to using a transformer? [closed]

We have a 1915 bungalow that I tore out all of the old knob-and-tube wiring, including the original ginormous doorbell transformer, and installed all new circuits throughout. I purchased a new, ...
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1answer
2k views

How can I use a second transformer to power my zone controller?

My system uses an EWC Controls model NCM 300 zone controller, that is currently powered using the transformer in the air handler unit. I'm installing two new smart thermostats, and the power ...
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2answers
2k views

How to wire a 220V to 12V transformer

I hope here I'll find an answer I'm looking for. Today I bought transformer from 220V to 12V, but the problem is that I have no Idea how to attached wires. Can somebody help me? here's the picture of ...
2
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1answer
2k views

Hardwire or plug in for LED strip lighting?

I'm interested in installing LED strip lighting around a door frame in a reach-in closet and laundry space (essentially a deeper reach-in closet with washer/dryer side by side). I plan to purchase ...
10
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2answers
2k views

What is this thing on my garage wall?

I just bought a house last year and there's this thing with what looks like string in the middle of the electrical system. The two pictures show said thing from a distance and close up. What is this ...
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3answers
898 views

Range Hood Transformer Replacement to LED

I have an Anacona Chef Range Hood. The two Halogen lights are not working. I suspect the transformer. I would like to replace it with the LED transformer. Is it possible? If possible, what type to ...
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1answer
691 views

How to protect outdoor transformer plugging into in-use outlet?

I have an outdoor DC transformer for lighting system that must connect to an outdoor outlet. It's not hardwired. So if I plug this transformer to an in-use outlet permanently, how do I ensure that ...
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1answer
127 views

Replacing Dimmable Halogen Spot light with LED dimmable or non Dimmable LED spotlights

I have old fashion dimmable halogen spotlight mounted on my ceiling, and I would like to replace them with LED spot lights. My questions are: Would I have to replace the existing transformers to ...
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1answer
405 views

Can I connect two LED lights to the same power driver?

I have two Lights (12V, 18W each) originally designed to be installed in automobiles (trucks for flood lights). I want to use them as work lights and install them both on the same support. I would ...
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1answer
156 views

Two shaver sockets on same circuit with extractor fan

I've just had a new bathroom installed(UK based) and the electrician has put two shaver sockets(110V and 220V outlets) and an extractor fan on the light circuit. With two toothbrushes plugged into ...
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1answer
3k views

Converting appliances from 120v -> 240v

I've been getting U.S. appliances sent to E.U. where the voltage is doubled. I'm using autotransformers so they can work, but this isn't ideal. I do this to save money. EU retailers add their ...
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1answer
195 views

Halogen transformer replacement: safe to use 60w max to replace a 75w max?

I have a 120V to 12V 75W max transformer powering an Ikea Halogen light fixture. It seems to have burnt out. All I can find in stores are 120V to 12V 60W max halogen transformers. The 75W max model I ...
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1answer
60 views

Electrical ,what voltage to use [closed]

I am confused about what voltage to use to calculate current for cable size of transformer. for example, single phase given load 140kva 120/240. if I=140/120v= 1166 A and if 140/240v=583A I know ...
0
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1answer
60 views

How can I identify which neighboring houses are fed from the same distribution transformer?

I (and some neighbors) want to use Ethernet-over-powerline extenders to join computer networks in adjacent houses. This is never a 'supported' use case with this gear, and I doubt the power company ...