Multiple Romex lines through one joist hole?


  #1  
Old 02-06-19, 04:49 AM
P
Member
Thread Starter
Join Date: Sep 2009
Location: Pittsburg, PA
Posts: 380
Received 1 Vote on 1 Post
Multiple Romex lines through one joist hole?

I understand the size and spacing rules about drilling holes in joists for romex (NM-B). Someone once told me it's better to keep lines a few inches from each other because in some cases it can cause electrical interference. I think this is bunk. Perhaps they were thinking about audio lines.

Is it normal and okay to run more than one Romex line through a single joist hole?
 
  #2  
Old 02-06-19, 04:52 AM
Geochurchi's Avatar
Member
Join Date: Nov 2012
Location: United States
Posts: 5,020
Received 90 Votes on 85 Posts
YES,***************************
Geo
 
  #3  
Old 02-06-19, 05:03 AM
L
Member
Join Date: Nov 2015
Posts: 1,601
Received 104 Votes on 90 Posts
Electrical interference is for phone and data lines. Do not run data lines right next to or same hole with electrical cables.
You can run electrical cables in the same hole all you want as long as it is not too tight.
 
  #4  
Old 02-06-19, 05:32 AM
A
Member
Join Date: Jun 2012
Location: USA
Posts: 1,675
Received 49 Votes on 44 Posts
Maybe they were thinking about the bundling rules that kick in when run together further than 24"
 
  #5  
Old 02-06-19, 06:06 AM
P
Member
Thread Starter
Join Date: Sep 2009
Location: Pittsburg, PA
Posts: 380
Received 1 Vote on 1 Post
I thought so but it's great to have the confirmation.

Thanks, have a good one.
 
  #6  
Old 02-06-19, 07:51 AM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: United States
Posts: 10,815
Received 105 Votes on 93 Posts
Is it normal and okay to run more than one Romex line through a single joist hole?

It's not a code violation, but still best to check with the AHJ in your area. I have seen some areas that won't allow more than one cable in a single hole.
 
 

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