bonding advise

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ibew613

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A).planning to install service with two ground rod as part of grounding electrode system. Question is... when bonding the building structure steel and water pipe can the bonding conductor connect to one of the rods?

B).Method "B" can the bonding conductor connect to the point at the service disconnect as the GEC , meaning conductor to rod and conductor to steel connected also to metal water pipe.

Planning to set meter and service disconnect on outside of building and install two rods on outside. Bonding of metal water pipe and building steel will consist of PVC run inside, with conductor connecting both. Best SAFE method to rod or service disconnect termation??
 
Not sure of all of your questions, but I can tell you that each electrode does NOT have to homerun to the service disconnect. You can connect electrode A to electrode B etc. as long as the wire connecting B to the service is the same size or larger than the wire connecting A to B. Did that make sense? In other words, the electodes get connected in the proper order (daisy chained) such that the wire gets bigger as you get closer to the service. The ground rod conductor is usually the smallest so it would be the last... at the tail end.

EDIT If the installation calls for #1/0 to the bldg steel and water pipe and #6 to the rod, then connect the rod to bldg steel, then the steel to the water pipe, and then the water pipe to the service.
 
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sparkie001 said:
"EDIT If the installation calls for #1/0 to the bldg steel and water pipe and #6 to the rod, then connect the rod to bldg steel, then the steel to the water pipe, and then the water pipe to the service."

I don't think that this is allowed per 250.52(A)(1) unless this is a industrial or commercial building. And then it is subject to the exception.
When you connect (bond) the ground rods to the building steel and then connect (bond) the steel to the water pipe and then bond the water pipe to the service, you're using the water pipe as part of the GEC.

You could do this if the metal water pipe and the building steel (can be and)are used as Grounding electrodes, but then, you won't need the ground rods.
I took the OP to be talking about bonding the steel and water piping..
Just my opinion
steve
Click to expand...
 
hillbilly said:
[I don't think that this is allowed per 250.52(A)(1) unless this is a industrial or commercial building. And then it is subject to the exception.
When you connect (bond) the ground rods to the building steel and then connect (bond) the steel to the water pipe and then bond the water pipe to the service, you're using the water pipe as part of the GEC.
Click to expand...

In any occupancy you can use the water pipe as part of the GES as long as it is within 5' of the point of entrance.

The exception allows further distances in some locations.
 
iwire said:
If you have acceptable building steel and metal water line you have no reason to add a ground rod at all.
Click to expand...

Right! :) I was trying to think of an example, without really thinking... :)
 
hillbilly said:
I don't think that this is allowed per 250.52(A)(1) unless this is a industrial or commercial building. And then it is subject to the exception.
When you connect (bond) the ground rods to the building steel and then connect (bond) the steel to the water pipe and then bond the water pipe to the service, you're using the water pipe as part of the GEC.
Click to expand...

Right. I was assuming that the GEC would continue to the service from the point it was connected to the CW pipe. TNX
 
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