ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
dsk 13
Admin 8
doc 3
Recent Posts
Bathroom electrical
by doc. 08/19/17 06:53 AM
electircal ageing test on IPC
by SIAME. 08/15/17 02:43 AM
electrical aging test on IPC
by gfretwell. 08/15/17 12:27 AM
"Line level" audio on Cat 5?
by gfretwell. 08/08/17 10:39 PM
Fire alarm phone lines and color coding
by gfretwell. 08/08/17 10:26 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
240,033 Are you busy
175,645 Re: Forum
167,877 Need opinion
Who's Online Now
0 registered members (), 89 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#185763 - 03/26/09 01:41 PM 250.104(C) Bonding of isolated steel I-beam  
earlydean  Offline
Member
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
I would like to read about your past practices and experiences with inspectors as regards to bonding of isolated and exposed steel I beams in otherwise wood frame construction. There is no way this steel may become energized, as no electrical item is mounted on it, nor is any wiring method attached to or even resting on it. Is it required to be bonded or not?


Earl

2017 / 2014 NEC & Related Books and Study Guides

#185776 - 03/26/09 06:59 PM Re: 250.104(C) Bonding of isolated steel I-beam [Re: earlydean]  
Yoopersup  Offline
Member
Joined: Mar 2003
Posts: 822
Michigan
Can you give an Example say height , Location , ect.


#185779 - 03/26/09 08:18 PM Re: 250.104(C) Bonding of isolated steel I-beam [Re: Yoopersup]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,858
Brick, NJ USA
Earl:
Perhaps the steel is mechanically connected to the earth??

In that case....yes...bond


John

#185783 - 03/27/09 12:44 AM Re: 250.104(C) Bonding of isolated steel I-beam [Re: HotLine1]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,103
Estero,Fl,usa
That is what I usually associate with the beam that goes across the basement. Typically it is an 8x17# on lally columns and caught at each end in a masonry pocket. (up there in the frozen north)
No. I have never seen any serious attempt to bond it.


Greg Fretwell

#185790 - 03/27/09 12:32 PM Re: 250.104(C) Bonding of isolated steel I-beam [Re: gfretwell]  
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
The NEC says if it is 'likely' to become energized, not if it is just 'possible'.

Should houses along the Gulf coast be built with roofs capable of handling 12" snow loads? Should houses in the far northern Midwest be built to survive hurricanes? Both conditions are possible, however neither is likely. Should nails used to hang pictures be grounded? Aren't they likely to become energized? If they weren't, why the restrictions an how close NM cable can be run near the front of a wall cavity?




Member Spotlight
Tom
Tom
Shinnston, WV USA
Posts: 1,044
Joined: January 2001
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: 0.018s Queries: 15 (0.004s) Memory: 0.7688 MB (Peak: 0.9110 MB) Zlib enabled. Server Time: 2017-08-21 16:07:20 UTC