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#104940 - 12/31/03 09:26 AM Loose Connection or Bad Splice Melts Wire Nut!  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
Honestly Now!!

Maybe those old ceramic wire-nuts were useful for something!

This is really scary!!

[Linked Image]


Joe Tedesco, NEC Consultant

2017 / 2014 NEC & Related Books and Study Guides

#104941 - 12/31/03 11:19 AM Re: Loose Connection or Bad Splice Melts Wire Nut!  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
That looks like it was a crimp-on lug connector...? Well, on 2nd look, maybe not, with the "spring" there. The other connectors are a similar yellow color.

Yes, that is scary looking. Reminds me of the crayons on the radiators in school [Linked Image]

[This message has been edited by ThinkGood (edited 12-31-2003).]


#104942 - 12/31/03 11:32 AM Re: Loose Connection or Bad Splice Melts Wire Nut!  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
The black stranded conductor has some of the "threads" nicked.

Ya think that could have contributed to the Marrette cheese? [Linked Image]


#104943 - 12/31/03 12:56 PM Re: Loose Connection or Bad Splice Melts Wire Nut!  
Mean Gene  Offline
Member
Joined: Oct 2003
Posts: 152
Ohio, USA
Hey Joe, Do you have a more zoomed-out version of that picture? I would like to see what the rest of the conductors look like. There are hints that they are not in much better shape. [Linked Image]

Below is a picture of a situation I encountered in my first house. Remodeling contractor, that also thought he was an electrician, just didn't get that fourth wire far enough into the wirenut before he applied the twist. I keep this on my desk at work as a constant reminder of how important correct electrical splices are. [Linked Image]

[Linked Image]

[This message has been edited by Mean Gene (edited 12-31-2003).]


#104944 - 12/31/03 03:24 PM Re: Loose Connection or Bad Splice Melts Wire Nut!  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
Mean Gene:

No I found this on the HVAC site and this was the only one, but have asked the webmaster to put me in touch with the person who posted this picture there. There are many electrical hazards and that's one of the items we discuss here.

Your burned up termination at the splice is also scary.


Joe Tedesco, NEC Consultant

#104945 - 12/31/03 03:48 PM Re: Loose Connection or Bad Splice Melts Wire Nut!  
:andy:  Offline
Member
Joined: Oct 2003
Posts: 289
Germany
coming to my point of view again, you wouldn't have ran into this with a wago (or a push-clamping one for stranded)........


#104946 - 12/31/03 05:50 PM Re: Loose Connection or Bad Splice Melts Wire Nut!  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
The “drooling” connector looks like it may be hopelessly undersized for the task, based on exposed strands of black conductor.

The assembly looks like a resistance/strip/duct heater, based on the definitie-purpose {vending-machine-grade} contactor, ceramic bushing and ‘therm-o-disk’ in picture. Looks like there is other evidence of localized overheating, possibly due to an intermittent/failed ‘indoor’ fan.

The black wire looks like part of some modification—maybe THHN “building wire” jury-rigged to red “appliance wiring material”—by an unqualified person.

What is the black crusty stuff [7 o’clock in picture] around red vinyl conductor? Gross overheating is likely, and needs detailed inspection/troubleshooting.


#104947 - 01/01/04 11:52 AM Re: Loose Connection or Bad Splice Melts Wire Nut!  
wolfdog  Offline
Member
Joined: Oct 2001
Posts: 135
Dallas,TX
Joe
I sent you an email with info about the post.

I'm sure he will be glad to hear from you.


#104948 - 01/01/04 05:22 PM Re: Loose Connection or Bad Splice Melts Wire Nut!  
wa2ise  Offline
Member
Joined: Nov 2002
Posts: 782
Oradell NJ USA
Quote
What is the black crusty stuff [7 o’clock in picture] around red vinyl conductor? Gross overheating is likely, and needs detailed inspection/troubleshooting.


I think it might be "friction tape" used for electrical tape. Which would mean that some unqualified handyman has been in there...


#104949 - 01/02/04 01:20 PM Re: Loose Connection or Bad Splice Melts Wire Nut!  
richard  Offline
Member
Joined: Aug 2003
Posts: 95
L.I. New York
IMO it looks like the black wire was not under the under sized wire nut, and was not properly pre-twisted to get the max surface area cunductor to conductor mating


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