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Hookup 3way switch from walltoswitchtoa light fixture

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The first thing you should learn about three way switches is how they work. Once you know how they work they are so much easier to wire.

First:
All neutrals (usually white) are tied together, which means the light bulb always has a way to return the current to the source (a complete circuit).

Second:
The hot (usually black and red) is what is opened or closed by the three way switches.

hookup 3way switch from walltoswitchtoa light fixt - 0bc756d8-5777-4af7-a88a-4cb48593f5c1.png

The main mistake when wiring a 3 way switch is not to tie the common to the power source on switch one and not to tie the lamp black wire to the common on switch two.

Notice that in the position above the lamp will be off. If you move the toggle down on the first switch then the power will be connected all the way through the the black wires to the lamp. If you move the toggle up on the second switch then the power will be connected to the lamp via the red wire. Either switch can then make or break the connection that allows the power to flow through to the lamp.

There are also variations of this configuration when the power is supplied to the lamp first. or if the power is supplied to switch two, but the principle is the same. In both of the later cases you must use the white wire to carry power or the hot leg and is not the preferred method, but is approved by the NEC. Typically, when this is done it is common to place a black piece of tape on the white wire to make you aware that the white wire might be hot. If you need the schematic for these variations, feel free to comment and I will be happy to create them.

Posted on May 27, 2014

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How do add a light fixture to a 3way switch circuit with power coming from the first light


Red or black from first light to second, white from first to second light. The lights will be in parallel both on/ off at same time.

Feb 13, 2015 | Electrical Supplies

Tip

4 way switch


If you wish to control a light or lights from more than 2 places, then you need a 4 way switch in between the 3way switches. You can use any number of 4 way switches in a lighting circuit.
To rough wire the switches, run a 3wire with ground cable from the 3way thru the 4way(s) to the other 3way. As in the 3way switch wiring the light and power can be at either end, that part does not change.
The diagram for the addition of a 4way switch looks like this..


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The travelers from the 3way switch connect to like colored screws on the 4way .. If more switches are wanted, just add them in the center of the circuit in the same manner as the first 4way .

on May 14, 2010 | Hammering

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We have a leviton dimmer and are installing a new fixture. When we connect the fixture, the light comes on and stays on. The switch does not work at all, but the power is reaching the fixture. The...


HI,
Usually there is only a red wire when there are 2 switches for the same light (a 3way) if that is the case you need a switch that is a 3 way, there are some 3 way dimmers. But you do need to replace both switches.
The other thing may be at the light fiture end. If the red wire is in there it should be connected to a black wire, which should only be connected to each other, that way the curcuit is broken.
or to say one white wire is connect to the light, a black wire connected to the red,(taking power to the switch) a black wire is returning from the light switch is connected to the light. (if it is a 3 way its different...)
Confused... 1st confirm if its a 3 way, second confirm if there is a red wire at the light fixture, from there I can guide you more.

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1 Answer

I installed the motion sensor on a 3way switch. Connected the red lead to the common and the yellow w/red strip lead to a traveler and the black lead to the other traveler. No matter how i switch the...


Leviton manuals:
http://www.leviton.com/OA_HTML/ibeCCtpSctDspRte.jsp?section=17219&minisite=10022

A quick peek inside a sample Leviton manual confirms that your wires are connect correct - BUT...
http://waterheatertimer.org/pdf/Leviton-motion-Instructions.pdf

The remaining 3-way switch needs a jumper wire.
See if your instruction manual shows the same thing as image below.
Let's go through this.
The yellow wire connects to a traveler ... and that traveler connects to one of the brass screws on 3-way switch.
The black wire from Motion sensor also connects to a traveler wire ... BUT you have to identify which traveler wire and which brass screw that traveler wire connects to. And then, put a jumper wire (a short piece of wire) from that brass screw to the dark-colored screw.
I think that will do it.
Add a comment if your device is different.
geno_3245_100.jpg

Some of these electronic devices are reversed when two of their wires are connected together.
That's what the jumper wire is doing. So the 3-way switch is just connecting and disconnecting the black and yellow wires, and that action reverses the circuit in the motion device.

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1 Answer

I am changing a 3way switch in the garage. I have 2 white, 1 blue, 2 orange, and 2 yellow wires my 3way switch has 2of the black screws. I cant seem to connect it right.


If you are replacing a three way switch with a three way switch, you should only use the wires that were connected to the old switch. (Unfortunately the color coding of these wires is not universal.) Assuming you have only 2 switches, that means you only need to connect 3 wires to the switch (in addition to the ground). One wire (to be connected alone on either side of the top or bottom of the switch) either comes from the electric panel or goes to the light fixture. The other two wires (both at the top or bottom of the switch) are the "travelers" and go directly to the other switch. You can examine the other switch (the one you aren't working on) to confirm which two wires are your travelers. I hope this helps. Good luck!

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1 Answer

Adding an additional light switch to an existing light


To add a second switch to control an existing light, you need to get a 3wire cable between the two switches, Thats red, black, white, green wires in the cable. Then you would have to use two 3way switches to make it work. I posted a "tip" on how to wire the 3way switches ..

Please Vote !!

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1 Answer

I just wired 2 3way switches with 3 lights in between them. Tried 2 different dimmer switches on the circuit but neither would dim the lights nor operate the lights as they should. The lights perform...


In general practice, you can only install ONE 3-way dimmer switch to control the lights. If you use two regular 3-way dimmer switches, the circuit won't work.

However, newer technology allows for double 3-way dimming from different locations. See this article about how to do this:

http://www.smarthome.com/2494M3/SwitchLinc-3-Way-Dimmer-INSTEON-3-Way-Dimmer-Kit/p.aspx

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1 Answer

Hi, i have a 2gang switch DOUBLE dimmer. I have two problems; all wires i have with the exception of the land one are red, as i do not remember where the blue one was connected to. Than where do i connect...


ok this may have to be a two part answer.. but i will try to walk you thru it.. First you must figure out which wier is the power wire. First turn the power off at the circuit breaker. Then , separate all the wires and pull them out so that you can test them. Put the power back on. With a tester or a lamp with bare wires, connect on of the tester wires to the ground (land). then touch each of the other wires until the tester lights up. That is your hot (power) wire. Mark it with tape. Then, connect one of your tester wires to the hot wire, and touch the other tester wire to one wire at a time to find the neutral wire. Mark that wire. Now. we have to find which wires go to the lights. connect one wire to the neutral wire. Touch one wire at a time to the hot wire. Eventually one light fixture should light up. Mark those two wires. Repeat until all the lights wires are identified. If you have a 3way switch then you will have an extra wire. I will refer you to a 3way wiring site to help you figure out how to hook up the switch as it would be too long to explain in words only. http://www.electrical-online.com/wiringdiagrams.htm

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1 Answer

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I am assuming that you have two 3way switches controlling this fan/light .. if there are more switches , then stop here and get back to me

connect the house wires red to red and black to black , then a house4 white to the ]fan white , the other house white connects to both the black and blue from the fan .. to be exactly correc the white fan wire should be connected to the white house wire that is the white power wire from the electrical panel.,

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