ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
sparky 4
BigB 2
Recent Posts
2017 NEC Changes
by HotLine1. 12/14/17 07:24 PM
Dimmable LED 2x4 lay in fixtures
by HotLine1. 12/14/17 07:15 PM
Casino Wiring methods
by HotLine1. 12/09/17 10:44 AM
Ground wire Size to water Line.
by HotLine1. 12/05/17 12:11 PM
Flexible conduit to an outside Spa
by gfretwell. 12/05/17 12:28 AM
New in the Gallery:
Gallery Test
Popular Topics(Views)
243,056 Are you busy
179,492 Re: Forum
170,415 Need opinion
Who's Online Now
0 registered members (), 11 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#71103 - 10/22/06 09:10 AM Knob & Tube  
HCE727  Offline
Member
Joined: Nov 2005
Posts: 186
Delaware County, PA, USA
Is there any kind of a crimp, that is legal, for a run of K&T, that some one tapped off of.

[This message has been edited by HCE727 (edited 10-22-2006).]

[This message has been edited by HCE727 (edited 10-22-2006).]


Hank

Work Gear for Electricians and the Trades

#71104 - 10/22/06 09:16 AM Re: Knob & Tube  
Tiger  Offline
Member
Joined: May 2005
Posts: 706
Crystal Lake, IL USA
I prefer the remove-and-replace method. Cleaning electrical messes is my favorite job. I don't avoid it, I embrace it.

Dave


#71105 - 10/22/06 10:16 AM Re: Knob & Tube  
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,405
Vienna, Austria
Solder and tape... I think there is a step by step manual with pictures somewhere on this board.


#71106 - 10/22/06 01:19 PM Re: Knob & Tube  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
Quote
394.56 Splices and Taps.
Splices shall be soldered unless approved splicing devices are used. In-line or strain splices shall not be used.

That counts out butt splices, or Wago type connectors....

This is a little article about crimp failures in appliances , but for this type of crimp connector used in a wall, the results would be about the same = not 100% reliable, and dangerous IMO. Sure you are allowed, and in a few situations required to have irreversable connections in a few locations like in grounding, but those connections and conductors are much large, and to be done right require tons of pressure to mash the connector and wire together. I haven't seen any made well enough to trust in the wall of a home for wire sizes 14-10. Most are made for automotive and appliance purposes.

Some places/inspectors would allow you to use a wire-nut type connector. Others wont... But they too have moderate failure rates, and methods of failure (arching) that would make me think twice of using one concealed inside a wall. As it would be inaccessible behind a finish. If I use one on K&T, it'll be in a box...

But mechanical splices done right, with clean metal to metal contact, and sealed in solder, and cleaned again, have been able to last without abuse or failure for over one hundred years! The only times I have seen ones that have failed, failed for reasons: dirty conductors, poorly or unsoldered connections, left over flux, or long term over-load of the circuit.

You can find more of my opinion on the matter here: http://www.markhellerelectric.com/wusplice.pdf

Some more here: https://www.electrical-contractor.net/ubb/Forum1/HTML/007216.html

Do a search in the general discussion area and you'll find many more.

[This message has been edited by e57 (edited 10-22-2006).]


Mark Heller
"Well - I oughta....." -Jackie Gleason

#71107 - 10/22/06 02:38 PM Re: Knob & Tube  
HCE727  Offline
Member
Joined: Nov 2005
Posts: 186
Delaware County, PA, USA
Thank You "E", you answered my question.


Hank


Member Spotlight
Lostazhell
Lostazhell
Bakersfield, CA (Originally Orange Co.)
Posts: 1,431
Joined: February 2004
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.011s Queries: 14 (0.002s) Memory: 0.7697 MB (Peak: 0.9070 MB) Zlib enabled. Server Time: 2017-12-15 10:19:29 UTC