14/4 or 2 x 14/2?

Reply

  #1  
Old 06-23-20, 11:50 AM
Q
Member
Thread Starter
Join Date: Jun 2014
Location: Canada
Posts: 1,729
Received 1 Vote on 1 Post
14/4 or 2 x 14/2?

Some controllers like ACs and HVAC require 14/4 wire. I have a whole load of sister 14/2. Can I just tie wrap 2 x 14/2 cables together and color code them?
 
Sponsored Links
  #2  
Old 06-23-20, 03:51 PM
Tolyn Ironhand's Avatar
Group Moderator
Join Date: Nov 2007
Location: Twin Cities, MN
Posts: 13,606
Received 205 Votes on 182 Posts
Is this just for control wiring? If that is the case I normally use 18/x stat cable. #14 is way overkill.
 
  #3  
Old 06-23-20, 04:37 PM
Join Date: Jan 2009
Location: United States
Posts: 583
Received 21 Votes on 21 Posts
Is this for a mini-split AC or AC heatpump? If so you usually need 14/4 (or however many wires that unit requires) Also you usually use stranded wire because you have to crimp on ring or fork terminals which is very difficult if not impossible with solid wire.
 
  #4  
Old 06-24-20, 10:12 AM
Z
Forum Topic Moderator
Join Date: Sep 2005
Location: USA
Posts: 5,277
Received 107 Votes on 99 Posts
I'm assuming this is for a mini-split or heat pump type system to connect the outside unit to the interior heads.

I wouldn't. Inside the house NM-B would be fine, but you'd have to adapt to UF or similar for outside. NM-B can't be used outside for the jump to the unit.

Other than the outside portion, I don't see any reason that it would be against code. Though it might be against the manufacturer's installation instructions (they may specify to use stranded), which could affect your warranty.
 
  #5  
Old 06-24-20, 01:38 PM
Q
Member
Thread Starter
Join Date: Jun 2014
Location: Canada
Posts: 1,729
Received 1 Vote on 1 Post
So for the outside heat pump I'd need 14/4 rated for outside/wet?
it's also for an air exchanger inside.
 
  #6  
Old 06-24-20, 09:45 PM
S
Member
Join Date: Feb 2017
Location: U.S.A.
Posts: 60
Received 1 Vote on 1 Post
I'm surprised by the replies

I'm assuming the question was related to carrying power, such as to a mini-split, and not just control signals. If it is OK to use two 14-2s in place of one 14-4, then wouldn't it be OK to use two 14-2s in place of a 14-3 say for carrying switched and unswitched wires to a receptacle or fixture (common neutral), or for the travelers and neutral in a 3-way switched circuit? In all these cases, you'd be using the non-neutral current carrying conductor in one cable to carry current that will be returned by the neutral current carry conductor in another cable? I would have thought that was prohibited, but, I'm not a pro.
 
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
 
Ask a Question
Question Title:
Description:
Your question will be posted in: