Main service external bar

[hhsting]

Main service grounding electrode system external ground bus bar has a brass tag and white letter engraving as shown below. Would not the brass plate cause problems and so would the engraving. Has anyone seen this? Is this allowed by NEC 2017 or not?

 

[infinity]

Would not the brass plate cause problems and so would the engraving.

No.

Has anyone seen this?

Yes.

Is this allowed by NEC 2017 or not?

Nothing in the NEC would prohibit labeling of this type.

 

[don_resqcapt19]

Why would any engineer require standoffs rated at 2000 volts of isolation for a bus bar used to connected grounding electrode conductors???

 

[hhsting]

Why would any engineer require standoffs rated at 2000 volts of isolation for a bus bar used to connected grounding electrode conductors???

Not sure what you mean?


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[infinity]

Not sure what you mean?

He's asking why you would need insulated standoffs rated for 2000 volts.

 

[zbang]

Not sure what you mean?

Since the ground bar, by definition, is at zero volt potential, insulating it from the wall for a 2000 volt potential difference serves no purpose.

 

[jim dungar]

Since the ground bar, by definition, is at zero volt potential, insulating it from the wall for a 2000 volt potential difference serves no purpose.

Except it is an easily achievable consistent spacing away from the wall. Yeah there are other ways, but there is nothing prohibiting it.

 

[qcroanoke]

Why would any engineer require standoffs rated at 2000 volts of isolation for a bus bar used to connected grounding electrode conductors???

R56?

 

[hhsting]

Why would any engineer require standoffs rated at 2000 volts of isolation for a bus bar used to connected grounding electrode conductors???

No idea. Drawings do point to main service grounding electrode system external bar and say see ground bar detail sheet xxxx.

So it’s definitely that.

 

[qcroanoke]

No idea. Drawings do point to main service grounding electrode system external bar and say see ground bar detail sheet xxxx.

So it’s definitely that.

Judging by my experience with those type of things I'd say that is a drawing for a cell site grounding plan.

 

[hhsting]

Judging by my experience with those type of things I'd say that is a drawing for a cell site grounding plan.

Nope its new garage building

 

[Joethemechanic]

Nope its new garage building

Is there some kind of unusual equipment being installed? The only time I've had any additional grounding in a garage was back in the days of "radio dispatch"

 

[electrofelon]

What is a "main grounding conductor? Typically those bars are used to connect multiple grounding electrode conductors from different electrodes, and/or taps to multiple service disconnects. So which one requires a label? Just more stupid grounding tin hat stuff.

 

[infinity]

What is a "main grounding conductor?

Main grounding conductor is right up there with the dumb minimum 2000 volt insulator requirement.

 

[zbang]

A garage? Must be a huge one.

It really looks like the engineer or their draftsman copied a bunch of boilerplate into the set without regard for whether it's even rational.

A garage for parking cars or for servicing them? How big a feed is this garage getting? If it's a carpark, underground a fair bit of the load will be the fans but above there will be much less of them. With LED lighting, that load won't be great. Absent other info, any grounding bar like that is not necessary.

(As with many questions, having context with the original question helps get to the right answer.)