Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Metal Building Grounding  (Read 1508 times)
KF4STX
Member

Posts: 7




Ignore
« on: June 11, 2008, 08:11:19 PM »

What are your recommendations for grounding a metal utility building? I currently have an 8' ground rod very close to building with a strap running from the building bottom plate to the rod. The building is totaly built using galvinized steel 2x4s and is 10' x 12'. It also has aluminum siding. Can I ground everything to the nearest stud or should I run seperate straps for everything?
Logged
K9KJM
Member

Posts: 2416




Ignore
« Reply #1 on: June 11, 2008, 09:06:21 PM »

The minimum grounding for a fairly small size metal building is an 8 foot ground rod at diagonal opposite corners of the building.

Whether any bonding needs to be done to the interior construction of the building depends on how it is constructed and screwed together.
If it is not electrically connected to all parts (Walls to roof for example) Bonding straps of some type should be used.  Metal pole barns with wood framework is an example. Although the walls and roof panels are all screwed to each other, There is no electrical bonding between the walls and roof metals.
Therefore, Some type of bonding is needed.
I just run the exterior ground wire up the siding, (Bonding to it) and then attaching to the roof metal at the two opposite diagonal corners.

If this building is up on a hilltop and about the highest thing around and you expect it may take direct lightning strike attachment, I would put a ground rod at each corner of the building.
Logged
AA4PB
Member

Posts: 12672




Ignore
« Reply #2 on: July 11, 2008, 05:34:08 AM »

By "grounding everything" I assume you are talking about grounding your radio equipment. I would NOT depend on the metal building joints for radio equipment grounds. Run a separate grounding wire just as if the building were all wood construction.

If you are talking about electrical service grounding, the NEC will NOT permit you to use that type of metal building structure for grounding.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!