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10 votes

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

I can't say it is official code. But my hunch is that even if code may technically allow reinstalling knob & tube in existing circuits, it is not a good idea. Certainly if anything goes wrong, ...
manassehkatz-Moving 2 Codidact's user avatar
9 votes

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

These switches don't have any neutral wires. The white wire is being used as a traveller. NEC requires the wire be identified with a marking such as black tape to indicate it is not grounded.
Robert Chapin's user avatar
8 votes
Accepted

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

Neutral must be white(or grey),over a certain gauge size(I think it is 4 gauge and larger that can be marked as neutral). White does not mean neutral. It should be marked as in your example, but ...
crip659's user avatar
  • 24.8k
6 votes

How can I get a hot wire in this 2-gang with only traveler wires?

Yeah, I grasped your intent from the original post. The pics match my presumptions, except both switches here are the last switch in a power-switch-switch-lamp wiring arrangement, so there is no way ...
Harper - Reinstate Monica's user avatar
6 votes
Accepted

What is a traveler wire and how does it work?

A traveler, in the context of the US terms 3-way and 4-way switches, is a wire between switches which sometimes carries power and sometimes does not, depending on switch positions. The specific ...
manassehkatz-Moving 2 Codidact's user avatar
6 votes

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

You might find some inspiration in NEC 394.19(B): Where space is too limited to provide these minimum clearances, such as at meters, panelboards, outlets, and switch points, the individual conductors ...
Robert Chapin's user avatar
5 votes

Can I install a three-way smart switch with my wiring?

Yes you can, it depends on what smart switch you get. This would work with what I have installed. You have neutral and live coming in You use white and black for that to both switches. One smart ...
Rohit Gupta's user avatar
  • 6,498
4 votes

What do I do with the "extra" traveler wire when removing a 3way switch?

Do I just put wire nuts on the ends and leave it? Exactly, cap on both ends and leave it unpowered. You can add in a label for the next person understand what it was and why it's capped.
ratchet freak's user avatar
4 votes
Accepted

How to completely remove a 3way light switch

Yes, there is. Between the two switched that make up your "3-way master switch", there is a pair of wires that are called the travelers. Identify these at each switch location and hopefully ...
Bart van Ingen Schenau's user avatar
4 votes

3-way switches On/Off Positions Changed

There are really only two ways this can change: Work and/or prank - someone opened up a switch and either rotated it 180 degrees or moved some of the wires. 4-way switch - If you have two switches ...
manassehkatz-Moving 2 Codidact's user avatar
3 votes
Accepted

How to Join Single Pole Light to 3-Way Light in Shared Box?

The only way you can get this to work is with smart switches or running another cable. The 12/3 between the 3 way switches has two travelers and neutral. Switched hot is only in the right switch box. ...
manassehkatz-Moving 2 Codidact's user avatar
3 votes
Accepted

How to replace two-way light switches with two black and two red wires?

You appear to have what is usually referred to as a 4-way switch. When there are two switches controlling one light, they are called 3-way switches. There are a number of ways of wiring them, but ...
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
  • 843
3 votes
Accepted

Installing leviton ODS10 motion occupancy switch on 3 way switch

That motion sensor is not designed to be a true 3-way switch so it cannot be used the way you want. If you study the second diagram, you’ll realize that it effectively is two single-pole switches in ...
DoxyLover's user avatar
  • 12.7k
3 votes

Can I install a three-way smart switch with my wiring?

Probably not, or not easily. Neutral isn't present at either of the switches; there is a hot and two traveller wires on one end, and two traveller wires and a switched hot on the other. that was ...
keshlam's user avatar
  • 29.5k
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
Accepted

How do I wire a a new light switch to old wiring?

If you look carefully at the picture of your old switch, you can see the word "common" near where the two reds are connected. This corresponds to the "COM" marking on the new ...
Bart van Ingen Schenau's user avatar
3 votes

Can you use wall switches and fan speed regulator in conjunction with a ceiling fan remote or do you have to choose between the two control options?

The fan you purchased is not compatible with your home wiring as you want to use it. The home wiring can be used with the fan if either the black or red wire is capped and not used. This will not ...
RMDman's user avatar
  • 30.9k
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

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
  • 29.5k
2 votes

How to 4way switch wiring - not according to standard diagrams

Below is an illustration of how a 4-way switch diagram works. Notice that the common wire is not included in the diagram - that's because it complicates the explanation because the power source may be ...
jgrant's user avatar
  • 384
2 votes
Accepted

Three-way circuit where one switch also toggles an extra light fixture on/off

From the truth table it appears that S1, S2, S3 together are a correctly-wired 4-way for controlling L1 over the stairs. The extra wrinkle with L2 on the balcony implies that power is supplied into ...
Greg Hill's user avatar
  • 30.8k
2 votes
Accepted

Can't figure out wiring in this three way switch

Looks like you have a combination of a switch loop and a three way switch. There's a nice diagram of the situation and a good explanation at hometips.com. In this case the wiring colors in the image ...
Greg Hill's user avatar
  • 30.8k
2 votes
Accepted

3-way light switch,faulty sensor switch or incorrect wiring?

Based on the installation instructions, I think you have most of this correct, as wacky as it looked to me at first. However, there is definitely one thing wrong: Line vs. Load. Line refers to ...
manassehkatz-Moving 2 Codidact's user avatar
2 votes

How to Join Single Pole Light to 3-Way Light in Shared Box?

Nope. You're not considering the neutral wire, which must be routed to both light fixtures, but cannot connect to any of the switches. I'm also mystified why you have any wires at all going to the ...
kreemoweet's user avatar
  • 3,608
2 votes

How to replace two-way light switches with two black and two red wires?

Generally, the routing of the wiring decides for you where the smart switches are going to be. You don't get to choose. Most people get stuck on smart switches when they try to force the choice: &...
Harper - Reinstate Monica's user avatar
2 votes
Accepted

4 way switch replacement

Brass = Line 1 & Black = Line 2 (or the other way around) Your new switch, like most four-ways, uses the two screw colors to distinguish between the two "sides" of the switch. As a ...
ThreePhaseEel's user avatar
2 votes

3 way switch for hallway

Cut power to both breakers and verify no live wires. It is very possible for there to be 240V in this circuit. VERY dangerous to work on live. Don't. First, count the jacketed wires. It appears there ...
RG Hughes's user avatar
  • 609
2 votes

How do I maintain equal hot and neutral paths when wiring 3-way switches with lights on both ends using a /4 wire between them

They don't need to be equal length the current in each Romex or conduit just needs to balance. to the lamp = from the lamp to the switch = from the switch to the supply = from the supply
Jasen's user avatar
  • 21.5k
2 votes
Accepted

How can I get a hot wire in this 2-gang with only traveler wires?

I was able to get this work by converting the other switch (not pictured) for light A to a SPST and re-purposing the traveler wires - one for dedicated hot and the other to just carry the load from ...
Adam's user avatar
  • 131

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