ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Changing a Bulb
by mbhydro. 07/21/18 05:57 PM
Opinions & comments
by HotLine1. 07/21/18 04:44 PM
Tray cable?
by gfretwell. 07/11/18 10:18 PM
Eaton Heavy Duty 30A and 60A Safety Switches
by Admin. 07/11/18 09:49 PM
ORTOVOX Recalls Avalanche Transceivers
by Admin. 07/11/18 09:44 PM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
0 registered members (), 22 guests, and 17 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Knob & Tube #71103
10/22/06 10:10 AM
10/22/06 10:10 AM
HCE727  Offline OP
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
Re: Knob & Tube #71104
10/22/06 10:16 AM
10/22/06 10:16 AM
T
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

Re: Knob & Tube #71105
10/22/06 11:16 AM
10/22/06 11:16 AM
T
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,426
Vienna, Austria
Solder and tape... I think there is a step by step manual with pictures somewhere on this board.

Re: Knob & Tube #71106
10/22/06 02:19 PM
10/22/06 02:19 PM
E
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
Re: Knob & Tube #71107
10/22/06 03:38 PM
10/22/06 03:38 PM
HCE727  Offline OP
Member
Joined: Nov 2005
Posts: 186
Delaware County, PA, USA
Thank You "E", you answered my question.


Hank

Featured:

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

 

Member Spotlight
richard
richard
L.I. New York
Posts: 95
Joined: August 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 5
Popular Topics(Views)
248,160 Are you busy
185,635 Re: Forum
174,999 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.023s Queries: 14 (0.004s) Memory: 0.9690 MB (Peak: 1.1080 MB) Zlib enabled. Server Time: 2018-07-22 16:04:37 UTC