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Staircase wiring circuit diagram for 2 way switch

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Copy following link for wiring 3-way switches (where 2 switches control same lights)

Each 3-way switch has 3 screws (plug green ground screw)
Two screws are 1 color usually brass, and other screw is different color usually dark.
The dark screw is common screw.

There are two basic wiring diagrams: Line-side/Load-side with neutral wire. And Line-side/Load-side without neutral wire.
Open link above and scroll down to see both wiring diagrams.

Posted on Nov 04, 2012


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Posted on Jan 02, 2017


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Replaced a ceiling fan controlled by 2 wall switches that had red, black and white wires. The FanimationPalisade switch has 2 black wires and a ground wire. How can I connect and keep 3 way operation?

You can't because the new controller is not Two Way which is like the switches you have at the top and bottom of stairs. In my experience there is no such thing as a 3 way switch, only one way and two way.

On a one way switch, you have one wire in and one wire out plus ground. On a two way you have an extra bridge connection which completes the circuit from the other end.

This shows the circuit in relation to stair lights, but your fan circuit is the same.

Aug 20, 2016 | Dryers

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Need wiring diagram

Wiring diagram for a 3-way switch, one of the many wiring diagrams showing different methods of wiring a three way switch circuit. This electrical wiring diagram shows power into light switch Box #1 – wire to light from switch box #1, and from switch box #1 to three-way light switch box #2.

Jan 06, 2016 | Holmes Products Heating & Cooling

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Hpm wiring diagram

Neutral is required to complete circuit in 120V 2-wire circuits


Aug 15, 2014 | Electrical Supplies

1 Answer

Install wiring

If you wish to replace the 3 way switch with a dimmer you have to buy a special 3 way dimmer. 3 way switches are for the top and bottom of a staircase or two ends of a hallway to have 2 switches control one light or lights, so if you buy a dimmer for one end it would be good to buy one for the other. I almost understand visually where all those wires go in your description but a photograph would have been better. A better description of which switch you wanted to replace as well.

Nov 04, 2013 | Leviton Toggle Dimmer - 6641-I - Ivory

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How to wire a two way switch for a staircase

Copy following link for 3-way switch wiring diagram:

Add a comment and say if you are adding a 3-way switch to existing single-pole switch.
You need 3 wires running to new 3-way switch.

Mar 16, 2013 | Electrical Supplies

1 Answer

How to wire two lights from one soure that have two differant switch with one being a 2 way?

In the schematic supplied, there are several options.
SW1 which is a regular SPST single pole single throw switch will open (off) or close (on) the circuit to lamp LA1.
SW2 is a two-way switch which turns LA2 off/on via SW2a.
SW2b is not connected.
SW3 and SW4 are two 2-way switches to switch LA3 on or off from either SW3 or SW4.
When both are in position a or position b then LA3 is on.
Otherwise LA3 is off.
This is often called 'staircase switching' as it can be used on a staircase.

switch-wiring options-cjxopzibqbmmln4bs3ln4vx1-1-0.png

Dec 02, 2017 | Dryers

1 Answer

I have a stairs with a switch and a bulb on each floor and i need to replace them with a wall pir sensor on each floor i need the wiring diagram

I answer questions for free.
I know electrical wiring.
I am unsure about a few things in your question.
Are you wanting to know how to wire a product you purchased?
Are looking for a wiring diagram to see if you can do what your want?

1) Is your circuit a 3-way circuit with 2 switches controlling both lights?
2) Or are there 2 different circuits where each switch controls one light?

Here is a Leviton manual with wiring for occupancy sensors:
If you want sensors to replace 3-way switches, you need a control sensor and a remote sensor.

Click link below to see this image clearly

Add a comment and I will get back to you with specific details about wiring.

Oct 31, 2010 | Cooper Wiring Devices Motion Sensing...

1 Answer

3 way switch diagrams

Three way switch diagram: Three-way switch has 3 screws


Before replacing old 3-way switch, mark the wire connected to dark-colored screw
Connect that wire to dark-colored screw on new switch.

If you are confused which wire goes to dark-colored screw
Mark the 2 black wires and the red wire.
You are not going to do anything with the white wire.
Connect blacks and red to any screw, turn on power, and try BOTH switches
Keep trying until correct combination is discovered
Both switches must work in all possible up-down positions before wiring is correct
Incorrect wiring will not blow circuit breaker, the circuit just doesn't work until wires are right.

Four way switch is added to 3-way circuit


Oct 09, 2010 | Garden

1 Answer

I know the circuit diagram but how do you

If the power originates at the location of the light (or other item being switched) you need a 3-core cable from there to to each switch location.
If the power originates at one of the switch locations you need a 2-core cable from there to the fixture and a 3-core cable to the other switch location. (If the cable to the second switch location is routed through the junction box at the fixture then you only need 4 cores from the first switch to the junction box--three switch wires and the neutral wire for the fixture.)
In all cases described above the ground (earth) wire is separate and not included in the count.

Oct 21, 2009 | Lutron CW-2-SS Claro Two-Gang Screwless...

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