Limit To How Many Wires Can Be Run Throught A Joist? - Electrical - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 08-03-2009, 10:30 AM   #1
Join Date: May 2009
Location: SE Wisconsin
Posts: 36
Rewards Points: 27

Limit to how many wires can be run throught a joist?

Is there a limit to how many 12/2 wire can be run through a 3/4" hole drilled in my ceiling joists? Is 3 or 4 ok?


jailbird371 is offline   Reply With Quote
Old 08-03-2009, 01:26 PM   #2
as seen on tv
Join Date: Mar 2009
Location: pa
Posts: 205
Rewards Points: 150

2 wires


qbert is offline   Reply With Quote
Old 08-03-2009, 01:48 PM   #3
300zx's Avatar
Join Date: May 2009
Location: Florida
Posts: 630
Rewards Points: 500

Code does not directly address the number of cables that can pass thru a hole.Look at this thread Allowed to run more than one romex cable through a single hole in a joist?
300zx is offline   Reply With Quote
Old 08-03-2009, 02:50 PM   #4
Licensed Electrical Cont.
Speedy Petey's Avatar
Join Date: Feb 2004
Location: NY State
Posts: 7,812
Rewards Points: 1,974

Up to FOUR 12/2 cables can be run without regard for ANY derating, if this is even an issue in the first place.
Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.
Speedy Petey is online now   Reply With Quote

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
one rotted deck joist to replace, need advice dougq Building & Construction 10 07-07-2009 02:18 PM
floor joist issue drtbk4ever Building & Construction 4 03-22-2009 10:20 AM
Unfused connectors MELTED House wires WHAT TO DO??? jamiedolan Electrical 63 02-12-2009 06:01 PM
hooking up dryer....bronx ny code SURFBUG Appliances 6 10-14-2008 09:41 PM
replacing rotted sill plate and rim joist behind a deck ledger board tommyt Building & Construction 2 08-11-2008 07:38 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1