Questions tagged [multiway-switch]

Use this tag for any time lights, fans, or devices are controlled from more than one wall switch location.

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6
votes
2answers
7k views

How does a three-way light switch work?

A three-way light switch allows the light to be controlled from two locations. How does this work?
5
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5answers
1k views

Are all switches in a 4-way circuit the same?

I have a four way switch in the house (I assume that is the correct term, 4 switches all controling the same light; flipping any one of them toggles the light; no other lights are affected). I am ...
5
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3answers
5k views

3-way switches no longer serving their purpose

I apologise if there is an answer to my question in one of the other multiple 3 way switch questions, but if there is I couldn't find it. I just bought an old house, built in 1967. I'm replacing the ...
5
votes
1answer
258 views

Is it okay for an electrical switch to get warm?

I installed a FEIT Electric dimmer switch on a circuit that controls 2 overhead lights. I noticed that, even when not using the dimmer, the toggle portion of the switch is warm to the touch. Is this ...
4
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5answers
5k views

Incorrect voltage at light sockets

Light bulbs on our kitchen lighting circuit need frequent replacing (lasting only a few months.) All other circuits in the house behave normally. There are three switch legs on this circuit: 6 ...
4
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2answers
827 views

3 way switch with outlet always live

First box has 14/2 from panel, 14/2 to outlet, 14/3 to the other switch Second box has 14/3 from the first switch and 14/2 to the light.. how can I wire these up for 3 way switch.
3
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2answers
244 views

Light Fixture Stopped Working After Replacing Its Three-Way Switch

I have a halogen light fixture that is powered by a three-way switch at the top of the stairs and another three-way switch at the bottom of the stairs. After I replaced both switches with new 3-way ...
3
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2answers
639 views

Multi gang switch boxes - Is it okay to keep the same branch neutrals separated for the different lighting/switching circuits?

I recently learned from this community about the importance of keeping currents balanced in each cable. In other words, current in one direction should be canceled by the same amount of current ...
3
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2answers
88 views

Is there a code-compliant way to label a wire where the conductors are not wired in the expected way?

This might be an X/Y problem, so if there is a better solution, I'm all ears. I have a 3-gang electrical box in my basement that is already overcrowded. It has The wire for the three-way light in the ...
3
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2answers
5k views

How can I test a three-way switch to determine if it's working?

I have a light fixture in my house that suddenly stopped working. I tried replacing the lightbulb and still non luck so I decided to try and see if it was the three way light switch itself using a ...
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3answers
2k views

When installing a three way dimmer switch, does it matter which switch is the dimmer?

My grandmother called me the other day to troubleshoot from half way accross the country. She installed a three way dimmer switch in her dinning room at the location most used. It turns the light on ...
3
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1answer
144 views

Need help with 3-way wiring (diagram included)

Could really use some help. I'm putting in some GE Z-Wave plus switches in my new house and have come across my first 3-way switch. I think the far left Romex in box #1 is the cable that goes between ...
3
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1answer
99 views

Where to locate light switches?

I live in a 1920s row home. It is 17' x 35'. We are planning on essentially rewiring the whole house since there are limited outlets and all the switches need to be replaced and the ceiling lights ...
2
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3answers
472 views

Replacing two 3-way dimmer switches with two non-dimmer 3-way switches

I had two Lutron 3-way dimmer switches for my bedroom lights. They looked something like this: https://www.amazon.com/Lutron-MAW603RH-WH-Electronics-Maestro-Dimmer/dp/B000BQMVXC I replaced the bulbs ...
2
votes
1answer
487 views

Help with 2 Dimmer Switches and bad wiring

Two dimmers in one "box", each going to a separate room. One set of lights started to flicker, so I figured I needed to replace the switch. I've done dimmers before. But when I opened the box, whoever ...
2
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2answers
60 views

Wiring new light switch

I am trying to install a motion activated light switch in my basement of my condo in the United States. On the switch it states that it's max load is 500 watts which should be plenty since the switch ...
2
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2answers
544 views

Continuous power between multi-gang boxes with 3 way switches

Apologies if this question is answered elsewhere. I couldn't find it specifically. I'm planning on installing two multi-gang switch boxes, where all of the switched lighting will be on the same ...
2
votes
2answers
361 views

wiring of occupancy switch in 3-way situation (odd-looking instructions)

I'm looking to replace one of the two switches (wired in a standard 3-way configuration) which control an overhead light in a utility room, with an occupancy sensor switch. The room is small enough ...
2
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2answers
27k views

Quickest way to identify line wire and load wire in a multiway switch

I am upgrading a lot of light switches in my home to Z-Wave smart switches. It is easy when it is a simple switch, but a 3-way, 4-way or n-way switch circuit is trickier. When doing so, I need to know ...
2
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1answer
87 views

Three-way switch wiring behaving oddly

The hot wire and traveler wire behave oddly in a three-way switch in a 1950s house. The metal box has three wires - red, white and yellow. The red-color wire measured 116V, so I assumed it's the hot ...
2
votes
1answer
232 views

Help with replacing 3 way switch with a smart 3 way switch

I'm trying to replace existing 3 way switches with 3 way smart switches to control the lights of my light/fan combo. The current set up is a dimmer in 1 location and a toggle switch on the other side ...
2
votes
2answers
446 views

Determining which 3 way switch is wired wrong

I have two 3 way switches controlling one light. Sometimes when the light is on neither switch will turn off the light but one of the switches will turn light off if switch is placed half way between ...
2
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1answer
141 views

Three Way Switch Works With Power Off

I have a switch box with 3 switches in it, each powering a different light. All three switches are supplied by pigtails from one incoming cable. Two switches are simple single pole switches and when ...
2
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1answer
664 views

One light switch powers two separate light switches

At the top of my stairs leading to my basement, I have one light switch (Top Switch) that powers two separate light switches at the bottom of my stairs. At the bottom of my stairs, the left light ...
2
votes
1answer
230 views

Need help figuring out X11 3-way switch connections (6 wires from one box)

So I recently bought a house, it was built in the 80s and the previous owner had installed X10 switches (before X10 was a thing, when it was called DHC or Decora Home Controls). Anyway, the garage has ...
2
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2answers
4k views

3-way switch loop wired with two 14-2 and one 14-3

I'm replacing a single 2-way ceiling light with recessed lighting, and discovered what I think is a switch loop when I pulled the ceiling light out. The confusing part (to me) is that the ceiling ...
2
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2answers
3k views

Can I install a photocell on a 3-way switched circuit?

I have a set of front exterior lights on my house which are controlled by two 3-way switches, one in the garage and one in the front entry way. I would like to install a photocell so that I can leave ...
1
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1answer
590 views

3 way switch mystery

Hoping someone can help me figure out whatever it was was they did. I recently rewired a three way switch be eliminating one switch altogether and using the other as a typical switch. Everything ...
1
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4answers
228 views

Indicator with two-way switch

We have a two way switch for an exhaust fan. The fan is out of sight from the switches. So, the problem we face is we have no clue if the fan is on or off looking at the switch. I tried to see if ...
1
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3answers
39 views

THHN through EMT - then convert to Romex?

I want to wire outlets and light in my unfinished attic. There is a light switch at the bottom of the stairs, cable (I think THHN?) that runs through EMT through the wall and comes out upstairs and ...
1
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1answer
39 views

Three way switch with intermittent light functionality

I have a fluorescent light fixture in my kitchen that works intermittently. Or, rather, has been working intermittently, but now has stopped working. I suspected that one of the three way switches ...
1
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1answer
55 views

Can a motion sensor switch be installed as part of a pair of switches?

I have a switch to my hallway by my garage. The other switch is by my stairs. I have had a motion sensor on the switch by the garage for about 15 years and it worked fine. It finally broke so I ...
1
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1answer
83 views

Adding back removed 3-way switch from 4-way setup

I made a terrible mistake. I removed a 3-way switch from a 4 way switch setup without labeling the existing wires. Now the light the switch was attached to doesn't come on. I was going to put a blank ...
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3answers
69 views

3-way light switch mysteriously works, then stops working, then starts working again

I have a three-way light switch that is exhibiting really odd behavior. Sometimes it works and sometimes it does not. For example, just now the following happened. Lights are off. I go to switch A ...
1
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3answers
91 views

How do I fix this 3 way switch mess?

I just moved into my house and replacing switches and receptacles when I come across a 3 way circuit not working correctly. I pulled the 2 switches to find someone had replaced one with a single pole ...
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2answers
50 views

Wiring ceiling fan/light properly on 2 different floors

I have a room with a cathedral ceiling and a mezzanine. On the ceiling I installed a ceiling fan with a light. I want to be able to control "three-way style" the fan and the light from the 2 floors (...
1
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4answers
4k views

Can I “flip” a light switch (top/bottom position)

I have a Decora 3 way switch, on the metal part it clearly label one side as the top. It is installed correctly right now. So right now, if both switches are on the "off" (down) position, the light ...
1
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1answer
31 views

Lutron Caseta smart dimmer with Pico remote in 4-way switch set up

I would like to install a lutron caseta smart dimmer switch in a four way switch line that has two 4-way switches and the obvious two three-way switches. I want to put the dimmer in place of one of ...
1
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3answers
176 views

Connecting a Leviton 3-Way Dimmer Switch to new 3-Way Circuit

I have wired a new 3-way circuit in a bunk-house exactly as shown in the following diagram, with wire types and colors matching those in the diagram 100%: I have a 2-pack of Leviton 6674 Dimmers, ...
1
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1answer
79 views

Do I need a neutral on the other end of a three-way switch?

I'm looking at adding a three-way switch to a room. I'll probably drop the hot and neutral into Box #1, but 12/2/2 (hot, 2x travelers and a neutral) is fairly esoteric cable (nobody locally sells it ...
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2answers
61 views

Basement lighting four rooms

So in my basement I want to add lights to 4 rooms. A total of 18 LED lights on 5 switches from one power feed. This would be a 15 A feed all 14-2 wire. Switches 2 & 3 would be a 3 way switch ...
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2answers
1k views

4-way switch - common wires are not normal

I am not an electrician and I have read all I can about 4-way switches/circuts. I am trying to replace a 4 way switch + 2 three way switches with zwave. I have done other 3-way installations (with ...
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2answers
65 views

Switching light without three way

Just looking to get someone's opinion on the legality or practicality of this circuit: There was another question posted recently where someone was asking about the ability to switch a second light ...
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2answers
9k views

Adding Light to Existing 3-Way Switch Configuration

I currently have a 3-Way light setup like the one pictured below but I want to add an additional light to the circuit on the right hand side switch. I can not add any wires between the two lights as ...
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2answers
1k views

Looking for triple 3-way switch [closed]

Where can I find a triple, 3-way switch (toggle style) were all of the switches are 3-way. All triple switches I find only have one 3-way, the other two switches are single pole. Here’s why I need a ...
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3answers
1k views

Replaced light fixture, now 3 way switch doesn’t work

I replaced an old lighting fixture with a remodel can and led trim, but in doing so the three way switches no longer work. I didn’t touch either switch’s wiring, but now the switch with the circuit ...
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3answers
1k views

Issue replacing a regular 3 way switch with smart one that requires neutral

This is what my downstairs 3 way switch looks like: The new smart switch requires a neutral, but it appears that the white wire is the hot wire, I checked with a non-touch voltage tester and it is, ...
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2answers
55 views

How to add a lamp on the other side of the switch series?

I have a fairly standard setup here. A lamp controlled by 3 switches, the middle of which is a 4-way switch (but I think that's fairly irrelevant). I would like to add an extra lamp, controlled by the ...
1
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1answer
66 views

How should I reconnect this switch?

I suppose it's a three-way. The red light it's the only hot wire. It was like that when I came to the house. But the wire on top of the red it's going to other room switch and light. The one next to ...
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1answer
44 views

Hallway Smart Switch help

I’d like to change my hallway switches to Lutron Caseta Smart Dimmers but I’m not sure how to proceed. I’ll preface with I’ve done pretty basic electrical (swapping to GFCI outlets, changing junction ...