ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Recall Notice Kidde Smoke Alarms
by dougwells. 03/22/18 01:40 PM
by HotLine1. 03/22/18 09:08 AM
Recall notice: Southwire wi-fi wall switches
by sparkyinak. 03/15/18 06:03 PM
Goodman Manufacturing Recalls Modular Blowers
by Admin. 03/13/18 10:40 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 32 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
six inches of free conductor #185833
03/31/09 01:35 PM
03/31/09 01:35 PM
earlydean  Offline OP
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
I am interested in comments on a fix. Sometimes we run into conductors in a ceiling box that have been damaged by overheating due to over wattage of the incandescent lamps. To restore them, is it permitted per Section 300.14 NEC to cut them back to good insulation and splice a six inch tail? If not, what can be done?

2017 / 2014 NEC & Related Books and Study Guides
Re: six inches of free conductor [Re: earlydean] #185834
03/31/09 03:57 PM
03/31/09 03:57 PM
KJay  Offline
Joined: Nov 2007
Posts: 763
I always first try and pull some slack through the clamp or connector if possible. If not, I will do exactly as you described.
In older homes where 60C NM cable is present, I always connect pigtails of 90C NM-B wire to comply with the light fixture listing that they be connected to min 90C wiring.
As far as 300.14 goes, it could probably be argued that there doesn't seem to be any wording that indicates that the required free conductor has to be one continuous piece and since this pigtail conductor doesn't originate from outside the box through a separate KO entry, it doesn't count as any additional box fill according to 314,16[B],1.
So, IMO these pigtailed wires would be considered a single conductor and the wirenuts also wouldn’t need to be counted in box fill either.
Seems like a win, win situation for once.

Re: six inches of free conductor [Re: KJay] #185835
03/31/09 04:05 PM
03/31/09 04:05 PM
wa2ise  Offline
Joined: Nov 2002
Posts: 786
Oradell NJ USA
Would it be better to use spaghetti tubing (or heat shrink, whichever listed for the purpose) to slip over the damaged portion of the insulation on the existing conductor? (remove the crumbled or scotched insulation, and use the spaghetti tubing as new insulation, and overlap the tubing over existing good insulation). That way, there's no splice in the copper itself. You could use spaghetti that has a higher temperature rating.

Re: six inches of free conductor [Re: wa2ise] #185837
03/31/09 05:23 PM
03/31/09 05:23 PM
earlydean  Offline OP
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
I have used both of these fixes and butt splices as well.

It sure beats having to cut in new boxes and "invisoplates".

Glad I'm not the only one.

Re: six inches of free conductor [Re: earlydean] #185980
04/09/09 03:33 AM
04/09/09 03:33 AM
ChicoC10  Offline
Joined: May 2007
Posts: 169
Went out to fix "a few lights not working" last week.
Without wasting too much time I decided to take down the entry fixture. 6 old asphalt cables in a 3/0 metal with a hickey and nice and crispy. Oh boy! Two j-boxes in the attic later everything was working.

Re: six inches of free conductor [Re: ChicoC10] #185992
04/09/09 02:07 PM
04/09/09 02:07 PM
gfretwell  Offline

Joined: Jul 2004
Posts: 9,186
For a short while, right after AMP started marketing the enclosed NM splice/tap some were suggesting this could be used and buried in these situations.
Knock out the old box, put in a splice up past the box and reinstall an old work ceiling box. Fortunately that didn't last long. The code 334.40(B) didn't change, only the marketing and literature that comes with the device. Now they only suggest this can be used in modular homes.
It is a distinction without a difference to me. Fires don't know the difference between stick built and factory built IMHO.
That still leaves us with few good options if you have no access to the top of the box.

Greg Fretwell


2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Berkley, MA
Posts: 144
Joined: March 2008
Show All Member Profiles 
Top Posters(30 Days)
Admin 5
Trumpy 5
Popular Topics(Views)
244,860 Are you busy
181,981 Re: Forum
172,016 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.028s Queries: 15 (0.005s) Memory: 0.9773 MB (Peak: 1.1250 MB) Zlib enabled. Server Time: 2018-03-23 10:41:55 UTC