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#151879 - 05/15/03 02:27 PM Conduit Bending in 1928  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,447
NY, USA
[Linked Image]

[Linked Image]

[Linked Image] Thanks to Joe Goble! (aka mountainman)


Tools for Electricians:

#151880 - 05/15/03 02:37 PM Re: Conduit Bending in 1928  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
The article's unstated safety principles are commendable—necktie ends stuffed into shirt. Aaagh!


#151881 - 05/15/03 02:43 PM Re: Conduit Bending in 1928  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
That's why I always wear Bow-Ties when I'm doing a Conduit Job!

[Linked Image]
Bill


#151882 - 05/15/03 04:14 PM Re: Conduit Bending in 1928  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Is there another page that shows how to pull wire through the four bend 360 degree saddle?

Tough for us with THHN try it with cloth covered. [Linked Image]


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#151883 - 05/15/03 08:01 PM Re: Conduit Bending in 1928  
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
Yet another reason why Mr. Benfield should get a Nobel Prize.
Also- anyone know when the 360 degree rule first entered the code?


#151884 - 05/16/03 06:36 AM Re: Conduit Bending in 1928  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
360°? Try pulling through those figure-8s!


#151885 - 05/16/03 10:22 AM Re: Conduit Bending in 1928  
Creighton  Offline
Member
Joined: Jan 2002
Posts: 59
Hayward, CA
John S. :A 360 degree limit appeared in the Aug. 31, 1897 Rules of the Underwriters Association of the Middle Department, which predated the National Electrical Code. No record that I know of as to how they arrived at the four ninety limit. If anybody knows, I wouldl be interested. Creighton.


#151886 - 05/16/03 01:12 PM Re: Conduit Bending in 1928  
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
Creighton,
When I came into the trade....... uh, musta been 3-4 years ago [Linked Image] the old geezers used to slap me up side the head for asking that question.

Sidewall bearing pressure aside, the "instruction" I received was that it had nothing to do with how hard we had to pull, it had to do with manufacturing a coil, and what that would do to our systems. I think it's probably a bit of both nowadays, but both do have their valid arguments.



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