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Should a metal chain-link fence be grounded? #72577
12/04/06 05:45 PM
12/04/06 05:45 PM
R
Rich Thomas  Offline OP
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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Re: Should a metal chain-link fence be grounded? #72578
12/04/06 07:34 PM
12/04/06 07:34 PM
L
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

Re: Should a metal chain-link fence be grounded? #72579
12/04/06 07:50 PM
12/04/06 07:50 PM
L
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.

Re: Should a metal chain-link fence be grounded? #72580
12/04/06 08:25 PM
12/04/06 08:25 PM
J
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 791
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

Re: Should a metal chain-link fence be grounded? #72581
12/04/06 11:18 PM
12/04/06 11:18 PM
M
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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