Hey guys I’m sorry for asking this as I know it’s been covered here before, but I can’t find a thread anywhere about this specific instance.
We installed a 600A resi service recently that was set up as follows:
500AL x 2 running into blocks inside an exterior gutter.
From the blocks we are feeding (1) 320A meter and (2) 100A meters (All single phase)
Inside the house we have (2) 200A Main Breaker panels and (2) 100A Main breaker disconnects.
My question (confusion) revolves around the grounding of the system and how we are supposed to properly bond the enclosures in the building.
We ran #6Cu to (2) ground rods and landed it inside panel 1. Then we just jumped from 1 to 2 to 3 to 4.
Now when we are going to be grounding the system via a water pipe, I used Table 250.102(c) and got 250AL as a proper size to run to the water pipe.
So, does the 250AL need to be landed in panel A and then jump to the other panels just like our #6 did?
I think, from reading the codes, that it DOES need to be connected to all the panels inside the house. 100A disco’s have literally NO space inside to put a 250 lug, let alone 2, so I then thought of just running 1 into each panel and landing them all inside a tap connector on top of the panels. Is this something that sounds cool???
PS: Gutter above meters is bonded with 250AL as well and ran inside to where the panels are.
Please just help guide me into the thought process of figuring out how to correctly size this and how to properly bond these panels together.
thank you in advance!!!
We installed a 600A resi service recently that was set up as follows:
500AL x 2 running into blocks inside an exterior gutter.
From the blocks we are feeding (1) 320A meter and (2) 100A meters (All single phase)
Inside the house we have (2) 200A Main Breaker panels and (2) 100A Main breaker disconnects.
My question (confusion) revolves around the grounding of the system and how we are supposed to properly bond the enclosures in the building.
We ran #6Cu to (2) ground rods and landed it inside panel 1. Then we just jumped from 1 to 2 to 3 to 4.
Now when we are going to be grounding the system via a water pipe, I used Table 250.102(c) and got 250AL as a proper size to run to the water pipe.
So, does the 250AL need to be landed in panel A and then jump to the other panels just like our #6 did?
I think, from reading the codes, that it DOES need to be connected to all the panels inside the house. 100A disco’s have literally NO space inside to put a 250 lug, let alone 2, so I then thought of just running 1 into each panel and landing them all inside a tap connector on top of the panels. Is this something that sounds cool???
PS: Gutter above meters is bonded with 250AL as well and ran inside to where the panels are.
Please just help guide me into the thought process of figuring out how to correctly size this and how to properly bond these panels together.
thank you in advance!!!