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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12 votes
3 answers
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Is it safe to use the ground as a neutral when other grounds are available?

I moved into a new house and was working on making a three way switch work properly when I came across some creative wiring. The traveling wire between the switches was only two wires, and the ground ...
yesennes's user avatar
  • 263
11 votes
2 answers
898 views

Run single strand of K&T wire through conduit under floor?

I have a contractor putting a pocket door in a wall in our 1925 house. He removed plaster from one side of the wall and exposed a single strand of Knob and Tube wiring right where the door needs to ...
Jasman's user avatar
  • 111
9 votes
6 answers
11k views

How to reverse a three way switch?

I have a set of lights that are controlled by two different switches. Flipping either switch at any time always changes the state of the lights (on to off or off to on). I have OCD and so I want both ...
Aaron_H's user avatar
  • 289
9 votes
2 answers
1k views

Can I Swap Ceiling Fan and Light Wires?

I bought a home with a ceiling fan that is wired in this manner: the light is on a single switch, and the fan is wired to two switches, on either sides of the room. It makes more sense to me to have ...
Matt's user avatar
  • 93
8 votes
3 answers
12k 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 ...
getitdone's user avatar
7 votes
3 answers
5k views

Why is my circuit breaker being tripped after removing a light switch?

In my dining room, there is a 2-gang switch box that houses two switches. Switch A is on a completely separate circuit from Switch B. Switch A controls a single light in the dining room, and is the ...
Alex's user avatar
  • 73
7 votes
6 answers
31k 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 ...
Dev 404's user avatar
  • 207
6 votes
5 answers
7k 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 ...
rghome's user avatar
  • 185
6 votes
2 answers
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?
Walker's user avatar
  • 6,219
5 votes
2 answers
6k views

How to wire two different 3-way circuits from same box

I have two separate 3-way lights that need to be powered from the same power source in one box (in addition to using the box as a junction to supply power to a different box, but I can't see why that ...
5000fingers's user avatar
5 votes
5 answers
41k views

What is the correct way to wire a 3 way switch where power comes into the middle switch?

I found two books and neither had the diagram. Only I found two separate diagrams that did not work. The setup: Box 1 with 3 wire runs to box 2. Box 2 has 2 wire power in, 2 wire to light and 3 wire ...
beast's user avatar
  • 305
5 votes
1 answer
2k views

Can 3-way wiring that works be wrong/dangerous?

I recently replaced a single pole switch with a 3-way. After following diagrams on many sites and watching several instructional videos on how 3-ways work (learning terms like "traveler" and ...
user3071434's user avatar
5 votes
3 answers
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 ...
watson387's user avatar
5 votes
1 answer
644 views

How Can I Install 3 Way Smart Switches That Require Neutral

I'm trying to replace 2 sets of three way switches with smart switches. One end of each set requires neutral, and unfortunately there doesn't seem to be a straight forward way to accomplish that with ...
kfoley's user avatar
  • 151
5 votes
2 answers
7k 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?
Nahom's user avatar
  • 53
5 votes
1 answer
5k views

When am I *required* to add a neutral to a three-way switch, and what is the best way to do so?

I have a 3-way switch wiring situation that to my understanding is no longer to code because there is no neutral wire in one of the boxes - for some dimmers and smart switches, I would need to add a ...
susie derkins's user avatar
5 votes
1 answer
637 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 ...
End Anti-Semitic Hate's user avatar
5 votes
2 answers
10k views

Wiring Leviton Smart 3-way Switch when Load Line Goes to the Fixture

I'm converting my home to use all Leviton smart dimmers (DH6HD-1BZ) and LED lights. All has gone well so far with neutral being accessible from most switches. However I've come across an old-school 3-...
okin33's user avatar
  • 53
4 votes
5 answers
13k 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 ...
Mike Chale's user avatar
4 votes
2 answers
736 views

What does a 3-way switch with neutral and black tape mean?

While replacing a failing 3-way toggle switch I noticed 2 unfamiliar things in the switch wiring: A white neutral. I have not come across switches with neutral connections in my limited time as a ...
eszed's user avatar
  • 565
4 votes
2 answers
2k views

Can I run my three-way travelers in a 14/2 without a neutral in the cable?

I have a surplus of 14/2 and a little bit of 14/3, and this project is price-sensitive, so I drew up this plan to make use of what I have on hand. It minimizes the length of 14/3 needed because that's ...
000's user avatar
  • 318
4 votes
2 answers
571 views

Is this 3 switch wiring arrangement allowed by code?

I have a hallway light fixture with three switches. When the circuit is off, a small voltage persists to the fixture causing LED and CFL bulbs to stop working prematurely. It is believed that the ...
psaxton's user avatar
  • 555
4 votes
1 answer
605 views

Theoretically, can one do this to troubleshoot a circuit?

Could you do this to troubleshoot sets of switches and outlets that are connected in 4-way and 3-way patterns: So if you unhook all wires that connect to outlets and switches in one circuit, could you ...
Sean McDonald's user avatar
4 votes
1 answer
2k 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 ...
Michael S's user avatar
4 votes
2 answers
3k 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 ...
Nicknamednick's user avatar
4 votes
2 answers
17k 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 ...
Brh's user avatar
  • 881
4 votes
2 answers
962 views

Why do my lights stay on after adding one to a three-way circuit?

I have a two-year-old home with an unfinished basement that I wanted to add a few recessed LED lights to an existing run of four traditional light bulb fixtures. When I completed the wiring and ...
Tom Ehrhart's user avatar
4 votes
1 answer
162 views

Installing leviton ODS10 motion occupancy switch on 3 way switch

I'm trying to install a motion sensor occupancy switch on a 3 way switch. It can be used with sensors in 2 locations as shown in instructions below, but I want to use the regular switch at the other ...
Fastskier25's user avatar
4 votes
1 answer
536 views

Replacing a combination switch to two separate switches (1. Simple light switch and 1 smart switch)

I have an outdoor light that I would like to control with a smart switch and a hallway light that can be a simple switch. Previously, the two were controlled by a non-smart combination switch; I would ...
jcruzer's user avatar
  • 43
4 votes
1 answer
369 views

Replacing a three-way switch wiring with smart switch(es), is it possible?

I have a 3-way setup and I'd love to make it smart, but I'm not sure how. Here's my setup: Box #1: 2 Wire Cable (Black, White) + 3 Wire Cable (Black, White, Red) Box #2: 3 Wire Cable (Black, White, ...
Francis Forget's user avatar
3 votes
2 answers
976 views

Should my smart switch be connected to the neutral wire from another cable?

I installed a Leviton smart switch in a 3-way circuit and the corresponding coordinating switch in the picture (right switch). The lights function as they should using both switches. However, I ...
user1259832's user avatar
3 votes
2 answers
3k 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 ...
Ryan's user avatar
  • 557
3 votes
2 answers
1k views

How to replace a double switch (single-pole and three-way) with separate switches?

I have a switch with two switches controlling two lights: One switch is a single-pole, the other is part of a three-way. I would like to split these into a double gang with separate switches. Here is ...
Todd's user avatar
  • 289
3 votes
1 answer
306 views

Is this a 3-way switch (has 5 terminals)? Can I replace it with lutron 3-way switch?

I have kitchen lights that are controlled from 3 different switches (with one switch a dimmer). Now one of the switches (not the dimmer one) is wobbly and I would like to replace it. When I opened it, ...
novice_make_user's user avatar
3 votes
1 answer
328 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-...
Archie Blythe's user avatar
3 votes
3 answers
90k 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 ...
Ryan's user avatar
  • 167
3 votes
2 answers
1k 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 ...
Sidney's user avatar
  • 1,645
3 votes
2 answers
2k views

Multiple 3 Way Switch wiring

I have a box that has 2 3-way switches. One goes to control the basement lights. The other one controls a light outside the basement. There is also a 3-way switch outside the basement that ...
Jeff's user avatar
  • 33
3 votes
3 answers
3k views

Ghost current in 3-way light swtich

I have a 3-way light switch in my hallway with 2 light bulbs. I canceled one of the bulbs (I don't necessarily need 2 lights) and install an LED light on the other. Now, when I'm turning off the the ...
rosencreuz's user avatar
3 votes
1 answer
547 views

How did they get constant hot and neutral at far switch?

My sister had some renovations done and we don't know how they ran the wire (don't bury your junction boxes!!!). I have a wire tracer and am working through them, so we will get there, but I am not ...
tjack2006's user avatar
3 votes
2 answers
2k 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.
Martin's user avatar
  • 31
3 votes
1 answer
7k 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, ...
Doug's user avatar
  • 367
3 votes
3 answers
12k 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 ...
Keni Harvey's user avatar
3 votes
1 answer
1k views

Installing Kasa smart dimmer 3 way with only 4 wires?

I have some lights controllable by two toggle switches on opposite sides of the room. Im located in the US in an older house, Im trying to install a Kasa Smart Dimmable 3-way Switch (KS230). However ...
Blueman101's user avatar
3 votes
1 answer
189 views

Two 3-way switches wiring to control two lights

I did some searches but cannot find the answer(s). I have two 3-way switches that control two lights. I am trying to convert them to smart switches and trying to figure out which kind to get. I opened ...
H.Hung's user avatar
  • 51
3 votes
1 answer
2k views

How to wire 2 switches with 1 hot wire?

My living room area power is apparently controlled by 1 switch. When on it powers all outlets and a light above the tv. Also, the switch has to be on in order for outdoor light to function and for ...
Nikki's user avatar
  • 31
3 votes
1 answer
243 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 ...
Willy Farrell's user avatar
3 votes
1 answer
197 views

Need Help Using a TP-Link HS210 Kit to Replace GE/Jasco Bluetooth Switch and Add-On

My house has an old GE/Jasco Bluetooth switch setup in a 3-way configuration. That uses 2 different kinds of switches. One is referred to as the primary and one is called an add-on. They have ...
JohnZ's user avatar
  • 31
3 votes
1 answer
767 views

TWO ORIGINAL SWITCHES - ONE three-way and one single cant figure out wiring for SAFE UPGRADE

(I'll attach photos and a diagram) I read through other posts on switch upgrades and learned a lot - thank you! My switch upgrade seems similar, but slightly unique and I can't figure out correct ...
SP in NJ's user avatar
3 votes
1 answer
687 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 ...
StrongBad's user avatar
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