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
6answers
13k views

Three way switch with two common wires?

Im currently trying to upgrade two three-way light switches in the kitchen to some new smart three-way switches. The issue I have run into though is that there appears to be two common wires on one of ...
6
votes
3answers
595 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 ...
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
votes
5answers
2k 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
votes
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
269 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
votes
5answers
6k 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
votes
2answers
950 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 ...
4
votes
1answer
87 views

Changing out an old light switch

Some background on this: the house is old, 1960's, and the previous owners loved having multiple switches run a single light. I am changing out a light switch inside the house that runs an outside ...
4
votes
2answers
1k 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
votes
2answers
570 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
votes
1answer
174 views

What do I do with these extra multiway wires in my light fixture?

I have been modifying some fluorescent light fixtures for led lamps. Ballast bypass lamps. Have done several so far and all good so far. I have a fixture that is a 4 lamp, 2 ballast. It is on a 3-...
3
votes
2answers
120 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
votes
2answers
6k 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 ...
3
votes
2answers
49 views

How to add a light to an existing 3-way circuit

Trying to add a light to an existing 3 way circuit. I have access from one light switch to my first junction box. The rest is Asbestos walls so I can't touch. Drawing below. Much obliged.
3
votes
1answer
60 views

How to wire a 3-way dimmer switch in box with three cables

I was thinking I would replace one of our dumb switches with an Eve smart switch. I opened it up to make sure it had a neutral wire, but it was wired so poorly that as I pulled on the old switch, ...
3
votes
3answers
3k 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
votes
1answer
159 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
votes
1answer
133 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 ...
3
votes
0answers
45 views

Fried switches, light fixtures, or wire?

In an attempt to fix a wiring problem from five years ago, I made a huge error. Here's the scenario: Box 1: Has switch #1 in a four-way set up (it's a 3-way switch) and is where the power comes in. ...
2
votes
3answers
497 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
494 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
votes
2answers
75 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
votes
2answers
716 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
3answers
58 views

How to install a Wemo Three-way light switch in this configuration?

I currently have this configuration in my home and I would like to replace the left switch with a wemo three-way Smart light switch. I'm not able to find any information online on how to do this with ...
2
votes
2answers
554 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
votes
2answers
36k 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
votes
1answer
116 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
467 views

Swapped out light switch and now WIRES have no power?

We’ve been swapping out all our outlets and switches in our house....with minimal problems until today. In our living room we have a dimmer switch on one wall that controls our overhead light. On ...
2
votes
1answer
375 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
521 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
votes
1answer
166 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
votes
1answer
814 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
291 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
votes
2answers
5k 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
votes
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
vote
1answer
618 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
vote
4answers
355 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
vote
2answers
95 views

Why three wires?

I have a carport light that takes two switches to operate. An inside switch essentially sends power to an outside switch. In other words, when the inside switch is in the "on" position, the outside ...
1
vote
1answer
93 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 ...
1
vote
1answer
68 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
vote
1answer
63 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
vote
1answer
41 views

In a three way switch, why would the “open” traveler wire test at 17VAC [duplicate]

While I had my 3 way switches open, I used a DMM to figure out what was hot and cold while flipping the switches. While my traveler shorted with the line feed showed 120VAC as expected, at least one ...
1
vote
1answer
32 views

Well pump only works with on/off switch not control box

My well pump is setup with an on/off switch that works fine as well as a control box that should be turning it on when activated. Now it just makes a clicking sound and nothing happens. I am ...
1
vote
3answers
117 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
vote
3answers
104 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 ...
1
vote
2answers
60 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
vote
4answers
5k 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
vote
2answers
2k views

Replaced Outlet and Switch, Now Light Won't Turn Off

I had a switched duplex receptacle controlled by two 3-way switches. An electrician installed a ceiling light using 14/3 wire running from the outlet. Everything was working - the 3-way switches ...
1
vote
1answer
44 views

2 single switches; want to create three way switch

I'm trying to improve the quality of lighting in my house. I used to do electrical work, but only got so far into the field. So... I have a 2 single switches; one controlling a light and another ...