NM-B Jacket Damage In Drop Ceiling - Electrical - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 10-18-2012, 08:33 PM   #1
Join Date: Nov 2010
Location: New Jersey
Posts: 139
Rewards Points: 75

NM-B Jacket Damage in Drop Ceiling

I just happened to be looking inside my drop ceiling in my finished basement and noticed that the jacket on a 14-2 (w/ground) NM-B wire had "split" open in several spots between two recessed cans and the paper wrapper was visible. I shut off the circuit breaker (15amp) and took out the one 6ft run to inspect it closer. I didn't see anything obvious outside of the damage to the jacket. The push-in connectors used in both cans all seemed good. I checked the rest of the basement and all the wire I can visually inspect seems to be in great shape. The cable is dated 9/12/04 and was installed in mid-2005. I do have forced hot air heating and the wire in question was split directly under the joist bay where it ran perpendicular to the duct. I have attached two photos of the wire in question. My big concern is that there was a short somewhere that heated the jacket and caused the damage.

Replacing the wire that is damaged is the obvious first step but should I be looking at replacing the two cans between the wires as well?
Attached Thumbnails
NM-B Jacket Damage in Drop Ceiling-photo2.jpg   NM-B Jacket Damage in Drop Ceiling-photo.jpg  


clydesdale is offline   Reply With Quote
Old 10-18-2012, 08:38 PM   #2
Semi-Pro Electro-Geek
Join Date: Jul 2009
Location: Arizona, USA
Posts: 3,045
Rewards Points: 2,990

That's not melted. It looks like mechanical damage, like it was pulled over a very sharp edge. It also could be a manufacturing defect. I really wouldn't worry about it. If the insulation on the conductors inside isn't damaged, just wrap it with electrical tape and leave it alone.


I am a lawyer, but not your lawyer. And who cares anyways? We're here to talk construction. This is DIY advice, not legal advice.
mpoulton is offline   Reply With Quote
Old 10-19-2012, 05:18 AM   #3
Electrical Contractor
kbsparky's Avatar
Join Date: Sep 2008
Location: Delmarva
Posts: 3,368
Rewards Points: 2,000

Damage from poor installation technique. Wrap it with some good electrical tape and call it a day.

Life is uncertain -- eat dessert first!!
kbsparky is offline   Reply With Quote
Old 10-19-2012, 07:59 AM   #4
Licensed Pro
Join Date: Mar 2007
Location: SC
Posts: 1,571
Rewards Points: 1,000

I've seem Romex like that right off of the coil... a manufacturing defect. As long as everything inside is intact, not a problem.
"Life is hard. Life is harder when you're stupid." John Wayne
HouseHelper is offline   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
Drop Ceiling Idea buildit45 Building & Construction 11 12-06-2012 01:09 PM
Drop Electrical box for Ceiling Fan into Boxed in Beam incufilter Electrical 6 07-01-2012 10:45 AM
Cans in a drop ceiling with 4" clearence RegeSullivan Electrical 3 04-27-2009 10:55 AM
Basement Ceiling- Combo of Drywall and Drop ceiling? H Thomas Building & Construction 5 03-27-2006 08:27 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1