Light Switch Wiring (doesn't Look Normal) - Electrical - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Search this Thread
Display Modes
Old 10-14-2017, 10:52 AM   #1
Join Date: Oct 2017
Posts: 1
Rewards Points: 2

light switch wiring (doesn't look normal)

hi, new to the forum, was looking for some insights. i'm replacing a dimmer switch with a regular switch, and looking at how it was originally wired, its not exactly normal. It's not a 3way switch, the dimmer just controls the ceiling light in the room, but there are 3 sets of wires behind the dimmer.
-the 3 whites are all wound together,
-1 black wire from the dimmer is connected to 2 black wires,
-the 2nd black wire in the dimmer connects with the other black wire.
i've added a schematic...all i want to do is put in a regular switch.
would it be safe to assume wires 1 and 2 are middle of line and then 3 is the wiring to the light (an end of line).

would you pigtail 1 &2 and have that go to 1 terminal, and then the black3 would go to the other terminal?

my house was built back in the 80s and it looks like the original build wasnt exactly normal. it's all safe, but just weird. any comments would help.
Attached Thumbnails
light switch wiring (doesn't look normal)-screen-shot-2017-10-14-11.47.13-am.png  
cmtodd is offline   Reply With Quote
Sponsored Links
Old 10-14-2017, 11:18 AM   #2
CodeMatters's Avatar
Join Date: Aug 2017
Location: Canada
Posts: 3,992
Rewards Points: 7,982

Re: light switch wiring (doesn't look normal)

That's normal. 1 & 2 are power in and power out. Doesn't matter
which one is which. 3 goes to the light.
Power is tapped off by the tail to power the light via the switch.
Add your new switch to the same wires and it'll work fine.
The wire nut on blk 3 isn't necessary and I'd eliminate it if the
wire is long enough.

edit: I now see the wires off the switch aren't tails, they're the
wires from the back of the dimmer.

Last edited by CodeMatters; 10-14-2017 at 11:31 AM.
CodeMatters is online now   Reply With Quote
Sponsored Links
Old 10-14-2017, 11:19 AM   #3
Join Date: Jan 2016
Posts: 1,273
Rewards Points: 18

Re: light switch wiring (doesn't look normal)

Run a pigtail from the two black wires that are connected together to one screw of the new switch (that is your incoming hot wire), and run the other black wire to the other screw on the new switch (that is your switch leg)

A pigtail is a 6 inch length of wire.

Sent from my SM-G530T using Tapatalk
jeffmattero76 is offline   Reply With Quote
Sponsored Links

3 wires , switch , wiring

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hot wires on both sides of switch RedRumLoki Electrical 4 11-20-2012 09:37 PM
Light in one lighted three-way switch not working dalepres Electrical 2 06-26-2012 06:27 AM
Trying to replace electric mower switch with normal light switch orrgroup Electrical 6 06-12-2012 05:45 PM
Rerouting Bathroom Wiring roasted Electrical 36 05-13-2012 09:58 PM
Wiring from light to switch and on poorjohn Electrical 3 03-16-2009 01:23 PM

Top of Page | View New Posts