Mystery wiring in kitchen ceiling

Reply

  #1  
Old 07-05-14, 06:56 PM
Member
Thread Starter
Join Date: Jul 2014
Posts: 14
Received 0 Votes on 0 Posts
Mystery wiring in kitchen ceiling

Today out of curiosity I took down an old kitchen ceiling light fixture. (I've been thinking about putting in some LED recessed lighting.... just checking to see how difficult that might be to do.) The light fixture is controlled by a single switch on the wall and the fixture is the only thing controlled by this switch. The kitchen ceiling has another fixture a few feet away, but it is controlled by a different switch on a different wall.

Anyway, the wiring in the box above the fixture didn't look like what I expected.
I'm a novice with household wiring so I need some help understanding what's going on. It appeared that there were three cables coming into the box. See attached photo... the cables are labeled #1, #2, and #3. #1 black went to the light fixture while #1 white was tied to the blacks from cables #2 and #3. The whites from #2 and #3 went to the light fixture. The ground wires from all three cables were tied together and to the box.

Can someone help me understand what's going on here? I only expected to see one cable.

Many thanks.
 
Attached Images  
Sponsored Links
  #2  
Old 07-05-14, 07:04 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 33,597
Received 13 Votes on 11 Posts
Yes, you have a switch loop. One 2-conductor cable goes to the switch. It carries poer for the light down to the switch on the white* wire and back up to the light on the black wire of the cable.

*By national code the white wire of the switch loop cable was supposed to be remarked black, red or any color but green or gray on both ends. Usually done with bands of colored tape or felt tip marker.

Name:  Sw_Loopb-1_zps62792cf4.jpg
Views: 2923
Size:  31.4 KB
 
  #3  
Old 07-05-14, 07:27 PM
Member
Thread Starter
Join Date: Jul 2014
Posts: 14
Received 0 Votes on 0 Posts
Thanks so much. It makes perfect sense.
 
Reply

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


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: