Two separate

[hhsting]

I have 2 separate building and one of the building has generator on roof. The generator feeds another building as shown below: do I need grounding electrode system at trough with three discos 250.30? Can one feed generator from one building to another as shown? Any code restriction?

 

[tom baker]

What determines if a generator needs a GES?
Hint look up definition of separately derived system?

 

[tom baker]

Instead of answering, let’s see if we can guide HHSting to the answer. I gave the first hint.

 

[hhsting]

Instead of answering, let’s see if we can guide HHSting to the answer. I have the first hint.

Yes 250.30 but Sorry I mean 250.32 instead of 250.30 post#1

You see generator feeder goes from one building to another so 250.32 apply to generator feed as well?

 

[tom baker]

All- please let me answer only

 

[tom baker]

Is this generator a separately derived system?

 

[hhsting]

Is this generator a separately derived system?

Yes but one of question pertains to 250.32 outside feeder and also can generator rooftop bldg A feed another bldg B is their code restrictions?

 

[tom baker]

What makes the generator separately derived?

 

[tom baker]

Let’s take one question at a time, first on the SDS, which leads to ground rods

 

[hhsting]

Let’s take one question at a time, first on the SDS, which leads to ground rods

I think ur missing something or maybe I am. Questions are not about grounding generator at all.

Lets take it one at a time: sketch post #1 do u see two separate buildings?

 

[tom baker]

You asked about GES in trough, which is fed from generator, that requirement is determined based on generator being SDS or not.

 

[hhsting]

You asked about GES in trough, which is fed from generator, that requirement is determined based on generator being SDS or not.

If you please note there are two troughs. The trough i am speaking is right end of sketch #1 inside separate building with three (3) disconnects

 

[tom baker]

Your drawing is blurry and I can’t see the details.
lets finish with the generator, is it an SDS or not?

 

[tom baker]

If you get the generator grounding and bonding wrong, it can result in fires, shocks or electrocutions. That is why you start with if the generator is an SDS or not.
Your question about a generator feeding another building, look in Art 215, its a short article and Art 225, look for a Part that is related to this question.
Its well written and there will be no issues in finding the correction section.
I am done with this post. I will lock it and just start a new version but with a drawing that is readable.