Inter-System Bonding Location(s)

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Bama_Electrical

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Location
Alabama
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Electrician
I will be wiring a house under 2017 code in a few weeks. The slab is about to be poured and I have been told by the owner that their directv dish will need to be on the side of the house opposite from where the cable internet will hookup. The question is, I will have an inter-system bonding block at the service. Can I tie the I-S Block from one side of the house to a block on the other side of the house?
 
Not only, you can, you should. Maybe even put a 1/2" PVC under the slab.

I believe, however, you can use the footing Ufer itself to interconnect them.
 
LarryFine said:
Not only, you can, you should. Maybe even put a 1/2" PVC under the slab.

I believe, however, you can use the footing Ufer itself to interconnect them.
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The 2020 edition now prohibits the use of rebar as a GES jumper. I think the bonding jumper from one side of the house to the other would have to be #6 CU.
 
texie said:
The 2020 edition now prohibits the use of rebar as a GES jumper. I think the bonding jumper from one side of the house to the other would have to be #6 CU.
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For this scenario, what would be best? A #4 bare in the footer from one side to the other or a #6 through the attic to the other side?
 
Bama_Electrical said:
For this scenario, what would be best? A #4 bare in the footer from one side to the other or a #6 through the attic to the other side?
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I suppose it could be argued that you could run it in the slab with a #6 as #6 is is all that is required for the IS bonding block. One thing is for sure is that the dish must connect to the building GES in some fashion both from a physics and code standpoint. It used to be common practice in this situation the simply drive a ground rod at the other side of the house to ground the dish in these cases but that was always wrong and can be very damaging in a lighting strike.
 
texie said:
I suppose it could be argued that you could run it in the slab with a #6 as #6 is is all that is required for the IS bonding block. One thing is for sure is that the dish must connect to the building GES in some fashion both from a physics and code standpoint. It used to be common practice in this situation the simply drive a ground rod at the other side of the house to ground the dish in these cases but that was always wrong and can be very damaging in a lighting strike.
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Unfortunately this is still done.
 
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