Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [low-voltage]

Electrical systems with voltages significantly lower than mains wiring. Examples include ethernet, telephone, cable tv, and alarm systems.

Low-voltage electrical systems are those with voltages significantly lower than standard mains wiring. In the US at least, these systems don't generally require inspections.

United States

  • Mains wiring: 120V
  • Telephone wiring: 48V DC (~90V AC when ringing)
  • Ethernet: 5V
  • Alarm systems: typically 12V
220 questions
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Can I use an over-rated transformer for a low-voltage lighting circuit?

I am trying to do a simple low voltage lighting design. I intend to use 3 18w incandescent bulbs just to light a small area. I want to know if there is a problem using a 120w transformer for this or should I use something much smaller like 75w? …
eh-five
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Can I double-feed a low voltage DC system?

I am trying to make some lighting resilient to breaker trips. (I.e. You trip the breaker and the lights don't go out.) Naturally it's all LED, and I am favorable toward low voltage DC lighting. I want to have a DC always-positive and return bus…
Harper - Reinstate Monica
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Separating wall cavity from cold air return for cable

I'm running cable for a motion sensor for our alarm system. I want to put it in the corner of the room and run the cable down inside the wall cavity, then through the right-side stud and down to a hole to the basement. However, at the bottom of…
dabigjhall
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Low-voltage lights turn on then start to flash

I've got a string of LV lights in my kitchen that over the last few weeks have started to behave oddly. They will turn on and the one farthest from the power supply are dimmer than the ones closest (there are 5 12-volt lights in the series and they…
cori
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How should I support junction boxes connected to a 24VAC transformer?

I have a 24VAC transformer that I plan to use in a shed for powering landscape lighting, WiFi cameras, sensors, etc. I had been powering these things from my irrigation system transformer, but I'm too close to overloading it now. Here's how I have…
watkipet
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How can I power pergola lights from a remote outlet?

I built a pergola in middle of my backyard. I have only one power outlet in my house wall facing backyard. I am also planning to connect the low voltage led landscape lights for the garden and put the Edison style LED bulb string on pergola. I…
user1631306
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Supplement battery charging (solar) with 15v landscape lighting input?

I have a 150w low voltage (DC) landscape lighting system (15v) but I'm only using maybe 50w of it. I also have a 400w solar array connected to a 40a MPPT controller that keeps a 50ah LiFePO4 battery charged...unless it's winter with long nights and…
Donavon Yelton
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Metered Electricity

I live in a 20 yr old motorhome that is parked in an RV park near Roseville Ca. The park has 90 separate sites each side has its own electrical tower to plug into. Each tower has a 50amp,30amp,and a 20amp. The 50amp is 240volt and referred to as a…
Tom Randolph
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What relay is needed?

I would like to use a thermopile to activate a 110 relay to turn on a fan. What relay would be needed? Thanks, Michael.
Michael D Belanger
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One of my IC1004-WH Legrand ON-Q Inquire 1000 intercoms isn't working, is it possible a POE injector would help?

One of my IC1004-WH Legrand ON-Q Inquire 1000 intercoms isn't working, is it possible a POE injector would help? It's a pretty long run, although other longer ones are working. It has worked somewhat in the past but gave a bad hum. Now it doesn't…
DaveX
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to Calculate the capacity of Voltage Stabilizer required for Home use

wanted to calculate the capacity of a voltage stabilizer for home use, Refrigerator has its own inbuilt voltage stabilizer, please tell me shall i have to include the refrigerator to calculate the capacity of voltage stabilizer for complete home via…
felekar mangesha
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Electrical Circuit low voltage [solved]

Let me start off by saying, I'm lost lol seriously. Ok I'll try my best to explain my situation here. I have 5 outlets on a 20 amp breaker with 14/2 wire All 5 outlets read around .57 to .76 voltage. I have pulled out each outlet and tested the…
user70085
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100 volts measured in fuse socket!

Just endured hurricane Irma here in S. FL. FPL finally turned the power on (and off a couple times) after days of outage. Now, one section of my kitchen is out while rest of house is on! checked the associated fuse socket (Yes, I have old fashion…
user75482
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Is my dryer outlet not getting enough voltage?

I wonder if that's my issue as well. My dryer works fine, ( but won't heat up) and after replacing a few parts multiple times, and trying 2 different dryers on the same outlet, which all worked but wouldn't heat up. This CAN'T be a coincidence, much…
Stephanie Lake
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