ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Grounding electrodes
by gfretwell - 09/07/21 03:41 PM
Looking For Electricians in the Midlands
by Alex247 - 09/06/21 05:26 AM
Backup Generator Done Right
by timmp - 08/31/21 04:44 PM
New in the Gallery:
Now you know.
Now you know.
by Tom_Horne, September 7
February, North East Indiana
February, North East Indiana
by timmp, July 25
Who's Online Now
0 members (), 31 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#213944 09/10/14 06:20 PM
Joined: Sep 2014
Posts: 2
K
kit Offline OP
New Member
I am working in a 100,000 sq ft warehouse, it is 36' to the bar joists. It has racking throughout the warehouse with shipping and receiving areas. There are workstations with desks, computors, copiers and etc throughout the warehouse in various locations. They need power and data to these desks. I want to know how to get power down from the bar joists above to the work stations that OSHA and the NEC will approve. Can I drop from the bar joists at 36' with a cord and put a box with a plug on it? I wold use wir grip (kellems) on both ends of the cord and boxes with hubs.

2017 / 2014 NEC & Related Books and Study Guides
Joined: May 2005
Posts: 984
G
Member
Most of the installation that I have seen for this involve putting the desks against a wall or column and using that as a conduit route from the roof trusses down to the furniture.
A free-hanging (and free-swinging) cord would likely not be looked upon kindly by the AHJ.


Ghost307
Joined: Jul 2004
Posts: 9,662
Likes: 4
G
Member
Pendant cords are legal but you need the right strain relieving hardware, hard service cord and generally twist lock receptacles.
If they are not moving these around, you could come floor to ceiling with strut and strap EMT to that. Hang a box there.


Greg Fretwell
Joined: Apr 2002
Posts: 7,279
Likes: 3
Member
High cube warehouses have EMT secured to the rack uprights, protected from any physical damage. The furniture is placed where the outlets are located. EMT for data also.

NEC 400.8, and 400.7 is where to look.

I accept, depending on the individual job, a twistlock receptacle at the bar joists, a kellems, and a TL male cap with a compliant device on the 'user' end of the cord. (Basically an 'extension cord)

Cord drops are an item that has been debated for a long, long time. IMHO, talk to your local AHJ, before you start.



John
Joined: Sep 2014
Posts: 2
K
kit Offline OP
New Member
Thanks for the help, looks like there is a lot of work to do to straighten up what they have.


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
AllClear
AllClear
Belmond Iowa US
Posts: 44
Joined: August 2005
Top Posters(30 Days)
timmp 3
FGBY 2
Popular Topics(Views)
282,917 Are you busy
216,686 Re: Forum
203,109 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5