This article was posted 09/14/2007 and is most likely outdated.

Article 547 Agricultural Buildings - 547.10
 

 
Subject - Article 547 Agricultural Buildings - 547.10

Based on - NEC - 2005 Edition

September 14, 2007
This newsletter was sent to 26816 newsletter subscribers
 

Ask a Question |  Weekly Code GraphicQuizzes |  Free Stuff InstructorsOnline Training Products | Seminars | SubscribeUnsubscribe
[ image1 Post Comments | View Comments | Notify Me When Comments Are Added ] Web Page Version [Printer-Friendly]    

Article 547   Hi Res - Cable/DSL [6336Kb]
VIEWING Video FILE requires
Real Media Player [ FREE ]
Agricultural Buildings

547.10 Equipotential Planes and Bonding of Equipotential Planes

Section revised to clarify when an equipotential plane is required in livestock buildings. Previous Codes required an equipotential plane where metallic equipment was “likely to become energized.”

The installation and bonding of equipotential planes must comply with (A) and (B).
(A) Where Equipotential Plane is Required. An equipotential plane must be installed in all concrete floor confinement areas of livestock buildings containing metallic equipment accessible to animals that may become energized.
Figure 547-2

Outdoor concrete confinement areas, such as feedlots, must have an equipotential plane around metallic equipment accessible to animals that may become energized.

The equipotential plane must encompass the area around the equipment where the animal stands.


Figure 547-2
(Click on image to enlarge)

       
 

Click here to post a comment
[ View More Newsletters ] [ Send to a Friend ] [ Post Comments | View Comments | Notify Me When Comments Are Added ]

Copyright © Mike Holt Enterprises, Inc. All rights reserved.
This article is protected by United States copyright and other intellectual property laws and may not be
displayed or published on the internet without the prior written permission of Mike Holt Enterprises, Inc.

http://www.MikeHolt.com     1-888-NEC-CODE (1-888-632-2633)

Experiencing a Problem? Click Here

Comments
  • I Would like to know the definition of equipotential, electrically speaking.

    Franisco Caicedo
    Reply to this comment

  • How does this code section apply to indoor and outdoor live stock areas that have earthen floors?

    Paul McNichol
    Reply to this comment

  • I had a farm like problem happen to me. The ground around a sign I was rebuilding. The sign had power and I raised the sign with a splice from 6 feet to 13 and then extended the circuit. Upon energizing the circuit I read 12 volts AC at the LB at ground level. From Hot to the LB it went to 118 v and to neutral it went to 70. Every rose bush and the sign pole would trigger my Fluke voltage Probe.

    Until that happened to me I found it hard to believe that farms could have this many problems. To many years wiring buildings I guess. Well the wires had 7.62K ohms between neutral and hot going back to the building. Tomorrow we dig up the ground and trace the problem down.

    Kid Stevens
    Reply to this comment

  • Would you please add some clarification to "may become energized".

    Howard
    Reply to this comment


Add Your Comments to this Newsletter
* Your Name:
   Your name will appear under your comments.

* Your Email:
   Your email address is not displayed.
* Comments:

This newsletter is closed to new comments.

Email Notification Options:
Notify me when a reply is posted to this comment
Notify me whenever a comment is posted to this newsletter