Four way wiring modification


  #1  
Old 04-28-24, 08:14 PM
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Four way wiring modification

I have a set of lights on a 4 way wiring.

One three way switch, one four way switch, and a second three way switch. However, the due to some reconfiguration the four way switch is now inside a closet and no longer needed.

I would like to remove the 4 way switch and change that switch box into a junction box instead.

Right now coming into the 4 way switch box are 4 conductors in an EMT conduit. Two black conductors two red conductors going to the 4 way switch. Red conductor #1 goes to a brass screw, red conductor #2 goes to a black screw, black conductor #1 goes to a brass screw, black conductor #2 goes to a black screw.

Once I removed the 4 way switch, how would I connect the 2 red and 2 black conductors such that the remaining 3 way switch will work as a normal three way?
 

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04-29-24, 02:38 PM
AllanJ
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The two traveler wires coming from one 3 way to the 4 way will almost certainly be different colors.

The two traveler wires coming from the other 3 way to the 4 way will almost certainly be different colors.

(You can verify the preceding 2 sentences by examining the 3 way switches.)

Fact: Either traveler wire from one 3 way may be connected to either wire coming from the other 3 way and the remianing two loose wires, coming from different switches, may then be connected together.

So of the 4 loose wires, if two are the same, connect them together. Then connect the other 2 loose wires together.

 

Last edited by AllanJ; 04-29-24 at 02:56 PM.
  #2  
Old 04-28-24, 11:15 PM
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The brass screw wires connect to one 3 way switch and the black screw wires connect to the other 3 way switch. You might want to label the pairs somehow before removing the switch. Anyway, red to red, black to black will work.
 
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Old 04-29-24, 04:11 AM
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#1 and #2 in post 1 are not helpful unless the 2 associated wires come from the same switch. Post 2 contains clarification.
 
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Old 04-29-24, 05:35 AM
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To eliminate the switch connect the two reds together and the two blacks together and put a blank cover on the box.
 
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Old 04-29-24, 06:55 AM
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#1 and #2 in post 1 are not helpful unless the 2 associated wires come from the same switch. Post 2 contains clarification.
I apologize. I really do not know how the conductors are paired because they came to this 4-way switch from the same 3/4" EMT conduit (amongst other conductors) so the traveler pairs probably met up somewhere in a ceiling fixture box above before coming down to the wall switch. It may be save to assume the travelers are paired as red/black but no idea which red is paired with which black.
 
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Old 04-29-24, 01:29 PM
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You could always see what's on the other three way switches for traveler colors but typically you would connect red to red and black to black.
 
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Old 04-29-24, 02:38 PM
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The two traveler wires coming from one 3 way to the 4 way will almost certainly be different colors.

The two traveler wires coming from the other 3 way to the 4 way will almost certainly be different colors.

(You can verify the preceding 2 sentences by examining the 3 way switches.)

Fact: Either traveler wire from one 3 way may be connected to either wire coming from the other 3 way and the remianing two loose wires, coming from different switches, may then be connected together.

So of the 4 loose wires, if two are the same, connect them together. Then connect the other 2 loose wires together.

 

Last edited by AllanJ; 04-29-24 at 02:56 PM.
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Old 05-06-24, 10:54 PM
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Just an update - connecting red to red and black to black at what used to be the 4 way switch location works! Thanks!
 
 

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