Two 2-wire Cables Legal In Three-way Circuit? - Electrical - Page 2 - DIY Chatroom Home Improvement Forum


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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 03-27-2012, 12:30 PM   #16
Floor Sweeper
 
Join Date: Nov 2007
Location: Central MN
Posts: 360
Rewards Points: 252
Default

Two 2-wire cables legal in three-way circuit?


The way it was commonly done is use one cable as a constant power and neutral, and the other cable as the two travelers. I don't see it being a problem if they are ran next to each other as they sound like they are. What you don't want is the two cables taking different paths through the house, which produces an EM field becuase the hot (travellers) and neutral are not ran together. This was done sometimes when the cable carrying the hot and nuetral came from a different box as the one carrying the three way & travelers.

The part that I don't understand is when you say "use both whites as neutral."

Advertisement

junkcollector is offline   Reply With Quote
Old 03-27-2012, 05:23 PM   #17
Member
 
Join Date: Aug 2010
Posts: 441
Rewards Points: 252
Default

Two 2-wire cables legal in three-way circuit?


Quote:
Originally Posted by joed View Post
Certain wiring configurations of three ways are switch loops. The ones with power feed at the fixture are switch loops. The ones with power feed at one switch going to second switch and then fixture are not switch loops.
i'll go for that.just took a while to catch what you said.
oleguy74 is offline   Reply With Quote
Old 03-27-2012, 05:32 PM   #18
Licensed Electrician
 
k_buz's Avatar
 
Join Date: Mar 2012
Location: SE Wisconsin
Posts: 4,343
Rewards Points: 2,006
Default

Two 2-wire cables legal in three-way circuit?


reconsidered the example

Last edited by k_buz; 03-27-2012 at 06:48 PM.
k_buz is offline   Reply With Quote
Old 03-27-2012, 06:37 PM   #19
Newbie
 
Join Date: Mar 2012
Posts: 3
Rewards Points: 10
Default

Two 2-wire cables legal in three-way circuit?


Thanks, everyone, for the replies. I'm less than clear, but I think the consensus is that it's not a great idea, but probably legal. In any case, I've finally found an electrician who will return my calls, so hopefully I'll make it his problem.

Terry
TerryR is offline   Reply With Quote
Old 03-27-2012, 06:47 PM   #20
Member
 
joed's Avatar
 
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 8,360
Rewards Points: 3,514
Blog Entries: 4
Default

Two 2-wire cables legal in three-way circuit?


Quote:
Originally Posted by k_buz View Post
Would you consider this legal?

hot comes to one of the 3way switches
a 2 wire to the 2nd 3way containing the travelers
a 2 wire to the 2nd 3 way containing either the hot or the switch leg and the neutral
switch leg comes out of the other 3 way switch

If not, why?
I would not because there is a code rule that says hots and neutral must be in the same cable or conduit or raceway. You have split the hot and neutral into two different cables.
__________________
Do not PM with questions that can be asked in a forum. I will not respond.
joed is online now   Reply With Quote
Old 03-27-2012, 06:49 PM   #21
Newbie
 
Join Date: Mar 2012
Posts: 3
Rewards Points: 10
Default

Two 2-wire cables legal in three-way circuit?


Quote:
Originally Posted by junkcollector View Post
The way it was commonly done is use one cable as a constant power and neutral, and the other cable as the two travelers.
I don't understand that with the power being supplied at the switch. Don't I just need a neutral and two travelers?

Quote:
I don't see it being a problem if they are ran next to each other as they sound like they are. What you don't want is the two cables taking different paths through the house, which produces an EM field becuase the hot (travellers) and neutral are not ran together.
That's right. Both cables come from the switch box, and run down the wall together (under the same staples, I'd guess). They come into the ceiling of the unfinished basement, where I'd run them into a box and wire a 14-3 to the other switch, and a 14-2 to the load.

Quote:
The part that I don't understand is when you say "use both whites as neutral."
I figure I need the two blacks as the travelers, and one white as the neutral. So I have a second white, which could either be ignored, or joined with the other white. I figured joining them together was better, but maybe not?

Terry
TerryR is offline   Reply With Quote
Old 03-27-2012, 06:50 PM   #22
Licensed Electrician
 
k_buz's Avatar
 
Join Date: Mar 2012
Location: SE Wisconsin
Posts: 4,343
Rewards Points: 2,006
Default

Two 2-wire cables legal in three-way circuit?


Quote:
Originally Posted by joed View Post
I would not because there is a code rule that says hots and neutral must be in the same cable or conduit or raceway. You have split the hot and neutral into two different cables.
I deleted the example because it was a poor example...sorry.

Advertisement

k_buz is offline   Reply With Quote
Reply


Thread Tools
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
Mixing 14/2 and 12/2 wire on one circuit? dekohl Electrical 12 03-13-2012 08:19 AM
Sharing Neutrals on the same phase electro Electrical 30 08-12-2010 03:10 PM
Decommissioning old armored wire circuit toddmanqa Electrical 6 12-04-2009 09:55 AM
Tying in aluminum wire to copper wire...legal? safe? I_think_I_conduit Electrical 2 11-06-2009 06:38 PM
hooking up dryer....bronx ny code SURFBUG Appliances 6 10-14-2008 10:41 PM




Top of Page | View New Posts