Black Marks On Wire And Insulation - Electrical - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 02-02-2013, 11:29 AM   #1
Join Date: Feb 2013
Posts: 1
Rewards Points: 10

black marks on wire and insulation

I have a three year old modular house. we have noticed some dark marks on the wall boards so we pulled off the sheetrock to look. we noticed there is lots of black marks on the wires and the insulation to the outlet boxes etc. the wireing is white romex. the wire does not feel rough or melted but it looks like tar on the wire and it is sticking to the paper insulation. what causes this and is it dangerous and in need of changeing? the room is a bedroom.


coathup is offline   Reply With Quote
Old 02-02-2013, 12:18 PM   #2
Join Date: Jul 2011
Posts: 1,339
Rewards Points: 1,500

I've noticed this in my attic wherever the paper is touching romex. I think the romex heats up and draws tar/resin out of the paper. Probably not a fire hazard, but the non paper side should be touching the wiring.


mikegp 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
Dark spots on insulation following electrical wire neight Insulation 3 12-31-2011 03:49 PM
Adding a wall switch to a pull chain fixture abacuslearns Electrical 17 12-20-2011 06:02 PM
Neutral Wire? 4x15mph Electrical 8 11-24-2008 01:00 PM
hooking up dryer....bronx ny code SURFBUG Appliances 6 10-14-2008 09:41 PM
Old house, new light fixture, too many wires Persephonee Electrical 3 01-15-2007 08:58 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1