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#72577 - 12/04/06 06:45 PM Should a metal chain-link fence be grounded?  
Rich Thomas  Offline
Member
Joined: Mar 2005
Posts: 48
Seattle, Washington, USA
This is for the design of a new 100KW, 277-480V engine-generator installation. The E/G will be mounted on a reinforced concrete pad. The pad will contain rebar grounding, and a buried ground ring with a ground rod at each corner. A chain-link fence will encircle the pad. There is nothing electrical mounted on, or near the fence. As far as I can see, the fence cannot become energized from the E/G equipment.

Do you recommend connecting the fence to the grounding electrode system for the generator/pad?

If yes, what is your recommended procedure? Should each post have a bolted connection to the grounding system?

Thanks for your input.


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#72578 - 12/04/06 08:34 PM Re: Should a metal chain-link fence be grounded?  
livetoride  Offline
Member
Joined: Jan 2005
Posts: 109
san diego ca usa
You did not state enough info but the fence most likely should be BONDED. My thought. Rod


#72579 - 12/04/06 08:50 PM Re: Should a metal chain-link fence be grounded?  
LK  Offline
Member
Joined: Jan 2003
Posts: 1,429
New Jersey
On the job you described, we have a professional engineer, supply the plans with a detail of all the bonding, this is a design issue.


#72580 - 12/04/06 09:25 PM Re: Should a metal chain-link fence be grounded?  
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 790
Chicago, Il.
I know that if I was the guy inside the fence, working on the genny, and could touch both, I would feel better knowing they're bonded.
Joe


#72581 - 12/05/06 12:18 AM Re: Should a metal chain-link fence be grounded?  
mhulbert  Offline
Member
Joined: Oct 2004
Posts: 132
Anaheim, CA USA
If it was a HV substation, it would be bonded, just so everything's at equipotential.

I doubt the fenc e is "likely to be energized" unless you have OH wiring or other hazards. But nothing is impossible. You have to decide if it's improbable.

If I was doing it, I'd ground it!



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