OUTDOOR FENCE GROUND WITH GROUND LOOP

[binwork91]

Hi, can someone share a detailed drawing of a bare copper ground loop for outdoor service equipment enclosed by a metal fence? Please include the ground loop, bonding, and fence posts.
Thank you.

 

[tom baker]

What voltage for the service?
A few more details, is there a transformer at the service and if so who owns the transformer?

 

[binwork91]

What voltage for the service?
A few more details, is there a transformer at the service and if so who owns the transformer?

It is a 480V/277V, 2000A service switch located outdoors. The utility company brings the cable into the switchboard, and the switchboard is owned by the customer. According to the code, there should be no public access to the switchboard, and the metal fence should be grounded.

I would like to know the details of how to ground the fence, the ground loop, and the service ground. More detailed information would be greatly appreciated.

I understand that NEC 250.194 mentions some of this, but I would like to see a detailed drawing if possible.

Thank you in advance.

 

[electrofelon]

It is a 480V/277V, 2000A service switch located outdoors. The utility company brings the cable into the switchboard, and the switchboard is owned by the customer. According to the code, there should be no public access to the switchboard, and the metal fence should be grounded.

I would like to know the details of how to ground the fence, the ground loop, and the service ground. More detailed information would be greatly appreciated.

I understand that NEC 250.194 mentions some of this, but I would like to see a detailed drawing if possible.

Thank you in advance.

There are no requirements to ground / Bond the fence. First you need to look at where you are in the NEC: 250.194 is for over 1,000 volts. Second, note the wording that talks about exposed live parts.

 

[electrofelon]

As far as grounding the service, that would be two ground rods typically. You can of course waste money on a more elaborate grounding system, but why not just send me the money instead?

 

[tom baker]

Just maintain clearances per 110.26. The fence is not likely to become energized thus no bonding of it is required

 

[binwork91]

Thank you for pointing this out. I really appreciate it.

 

[tom baker]

Sure. Thanks for asking. We all learn.

 

[kingpb]

I believe you are thinking of touch potentials. Never seen it considered for 480V/277V.