Skip to main content
8 votes
Accepted

Is it required to connect ground wire to light switch?

Since you have a plastic box, an explicit ground wire connection is required. With a metallic box it's generally not, for switches, as they can ground by connection to the metal box, which should be ...
Ecnerwal's user avatar
  • 220k
6 votes

What is the third group of wires in the switch box?

The third set of wires is going to another device. Good chance it is a receptacle, because the switch box was closest. You will find a receptacle that has no power right now, until you connect the ...
crip659's user avatar
  • 25.7k
5 votes

How to replace outlet and switch combo with GFCI and dimmer where two white wires were going into outlet?

If the lights work properly when only the switch is connected as in your second photo, then you have two (independent) circuits in that box. 1 circuit with hot (black) and neutral (white) for the ...
Bart van Ingen Schenau's user avatar
5 votes

How to replace single switch with two black wires?

An ordinary (not "smart") switch has two or three connections: Incoming Hot, a.k.a., Hot or Line Switched Hot, a.k.a., Load Optionally, ground FYI, ground is optional because if a switch ...
manassehkatz-Moving 2 Codidact's user avatar
5 votes
Accepted

Is there anything I can look for in LED Bulbs and or LED dimmers to ensure there is no "heartbeat" flicker?

I would have thought getting LED's listed as dimmable and a switch listed as capable of dimming LED's would have been all I needed to avoid flickering issues; as that is not the case, I'm not really ...
Harper - Reinstate Monica's user avatar
4 votes

Wiring smart switches

In this setup, the /3 cable is coming from power via a lamp. It is carrying supply power on black, supply neutral on white, and switched-hot for one lamp is doubling back on the red wire. That lamp ...
Harper - Reinstate Monica's user avatar
4 votes
Accepted

Will a continuity tester or ohm test work to test if a 3-way dimmer switch is faulty?

Continuity testing works with a simple switch. That's a switch with no: WiFi Timer Dimmer Other "smart" functions Why? Because a simple switch simply makes or breaks an electrical ...
manassehkatz-Moving 2 Codidact's user avatar
3 votes

Will the dimmer switch on a 40 year old lamp work with “dimmable LEDs”?

All you can do is try it. Get a bulb and screw it into the lamp and see what happens. It might just work. I have 6 dimmers I installed in the very early 80's for standard incandesent flood lights. I ...
JACK's user avatar
  • 82.3k
3 votes

Issue with Neutral Wire grouping to install Kasa Smart Dimmer

You're saying "spare neutrals" as if you see multiple neutrals sitting there unused waiting for you. We hear that a lot. Actually, those spliced neutrals are working very hard, returning ...
Harper - Reinstate Monica's user avatar
3 votes
Accepted

Identifying which is neutral in 3-way wiring

Assuming you have a functioning ground in each box, which is not 100% guaranteed, but should be the case for any 1960s or later house, and many earlier ones as well, and assuming your 3-way switch ...
manassehkatz-Moving 2 Codidact's user avatar
3 votes

Possible to covert normal switch to three way?

Is it possible to modify a normal dimmer switch to work as a three way switch? It is not possible. The difference between 2-way, 3-way, and 4-way switches is inherent to the internal design of the ...
ickybus's user avatar
  • 853
3 votes

Dimmer light switch - smell & yellow foam

Ever hear of Grenfell Towers? That stuff there is cheap, 1-part "spray foam in a can". That stuff has extremely terrible fire characteristics, and is not far removed from napalm. (There is ...
Harper - Reinstate Monica's user avatar
3 votes

Does it matter which traveler wire goes to which brass screw on a 3-way dimmer?

I only know so much from trial and error DO NOT do "trial and error". While it seems clever to try combinations until one works, the fact is many combinations will work just fine and then ...
Harper - Reinstate Monica's user avatar
3 votes

Is this LED light fixture compatible with a dimmer switch? (Photo attached)

Other units that I could find which use the same power supply part number support dimming, so I suspect this luminaire will work fine with a dimmer. To truly confirm you will need the part number. ...
KMJ's user avatar
  • 12.1k
3 votes
Accepted

Converted dimmers causing circuit issues

The solution to this problem ended up being not related to the wiring at all. If you run into a similar issue look into led lighting and RF interference. In this situation, one of the led fixtures was ...
user2188659's user avatar
3 votes

Adjusting Dimmer with no visible low end trim

I have a half dozen of those dimmers in my house and have installed hundreds and they all do that. I never gave it a second thought. Bulbs need a certain amount of voltage/current to turn on. Once ...
JACK's user avatar
  • 82.3k
2 votes

Circuit Tripping Immediately after replacing three way dimmer

the other two wires I was unsure of and just wired them Stop what you're doing and make sure the circuit is off. Remove the switch(es) that you replaced. Get a multi-tester and identify every wire. ...
Robert Chapin's user avatar
2 votes

Is there anything I can look for in LED Bulbs and or LED dimmers to ensure there is no "heartbeat" flicker?

Not really. Quality matters. If they flicker it's related to the quality of either your bulbs or your power. The bulbs take the AC and convert it to DC for the LEDs. If the DC power supply in the bulb ...
STS1SS's user avatar
  • 457
2 votes

Manufactured home - toggle to dimmer

Next time, take a picture of the wiring before disconnecting the old switch. Then you just wire up new to match old. Since you don't know how the wires were connected previously, you need to figure ...
manassehkatz-Moving 2 Codidact's user avatar
2 votes
Accepted

Dimmable light forgets it's settings when turned off

That's a limitation of the circuitry of that "smart" hardware. It could have been designed to record its state in something like flash memory and recover that when it powered up again. But ...
keshlam's user avatar
  • 30.4k
2 votes
Accepted

How can I identify dimmable lights that will work as dimmable with my dimmer lamp?

Dimmable LEDs work off of a different technology than an incandescent bulb. With an incandescent, you turn down the power and the bulb doesn't produce as much light. With an LED, you turn down the ...
FreeMan's user avatar
  • 47.5k
2 votes

Possible to covert normal switch to three way?

If you have neutral at both switch boxes, another solution is smart dimmers with one just set up to act as a remote control for the other.
keshlam's user avatar
  • 30.4k
2 votes

dimmer with neutral wire (not a smart dimmer)

so what i had was a reverse-phase dimmer, this pdf from Leviton explains it https://www.leviton.com/en/docs/Dimmer-Forward-and-Reverse-Application-Note.pdf The most common technology used to produce ...
ron's user avatar
  • 1,204
2 votes

LED dimmer switch

The light needs one (switched) live and one neutral. A dumb switch (i.e. any switch that is "old") does not connect to neutral at all. A dumb switch has live, and switched live. Live comes ...
Ecnerwal's user avatar
  • 220k
2 votes

How to fix flickering appliance LED lighting that is wired in series with a diode for dimming?

The answer to 2 is a capacitor. It would have to be AC rated, to at least your supply voltage. My rough calculations for the capacitance would be: If P = V²/R, then R = V²/P, so the effective ...
Simon B's user avatar
  • 3,958
2 votes

Kasa smart switch two red wire and one yellow wire

In a close-up of the white-box-on-back switch, it appears there are two screws, Black = "Line" (power in) and Red = "Load" (power out to light). Also, there are a White wire, ...
Triplefault's user avatar
  • 8,182
2 votes
Accepted

Have 0-10v sink dimmer change it to source dimmer

It is possible to convert between ESTA E1.3 and IEC Standard 60929 Annex E dimming. The circuit is even relatively simple. There are commercial products available which convert between the two ...
KMJ's user avatar
  • 12.1k
1 vote
Accepted

Wiring dimmer switches in 12V DC circuit with LEDs?

The way you have the dimmer wired is incorrect. The dimmer must be wired after the power supply and before the lights. The red wire from the power supply is cut and the red from the dimmer is attached ...
RMDman's user avatar
  • 32.5k
1 vote

Adding a dimmer switch

If you have 2 switches controlling one light, most likely you have a "3-way" as the Americans call it. In a 3-way wiring topology, you do not get to choose the location of the smart switch/...
Harper - Reinstate Monica's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible