Service

[The Learner]

Installing a 4000 amp service

The service room has a ground bar on the wall. Going to that ground bar we have:
1) A 3/0 going down to the main service switch where the ground and neutral is b
2) A 3/0 going directly to the water main
3) A 3/0 going to building steel.

The ground bar is the central ground. Is there any violation here?

 

[LarryFine]

Not that I see.

 

[The Learner]

Thanks Larry. I didn’t think so. Someone at work was saying that water main bond needs to originate in the main service switch where the neutral and ground were bonded. I didn’t believe so

 

[augie47]

Are the 3/0s in conduit ? If so what type ?

 

[The Learner]

Emt conduit yes with ground hubs on them

 

[tom baker]

Basic rules is that the GEC must be unspliced but there is an allowance for a ground bar such as you have, its a great way to terminate all the GEC and bonding jumpers, See 250.64 C

 

[infinity]

Not an issue and done that way all of the time in a commercial buildings.

 

[The Learner]

Thanks guys