water service change bonding

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Gac66610

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Kansas
just received a call from a plumber who is adding a new water service, the new is pex, old is galvanized,

electric service has one driven ground and is bonded to the water within 5 feet of water entering the building.

plumber is going to leave the galvanized pipe in the ground more than 10' outside of structure

Question : if leaving the galvanized pipe with the bonding intact does there need to be another driven ground?

i'm thinking it is not required

your thoughts appreciated, BTW the code cycle is 2011
 
Not sure. I can't tell if 10' of your water pipe is still metal, or if the old pipe is being abandoned and you're using as a supplemental electrode for the rod.

Case 1: 250.53(D)(2) says a metal underground water pipe must be supplemented by a rod/pipe/plate and comply with 250.56. 250.56 says you need a second rod or pipe if the first isn't 25 ohms or less.
Case 2: 250.53(G) says pipe electrodes must be vertial unless rock bottom is encountered. If rocky, you do up to 45 degrees. If that fails you can lay horizontally, but must be at least 30" deep. How deep is that old pipe?
 
Gac66610 said:
just received a call from a plumber who is adding a new water service, the new is pex, old is galvanized,

electric service has one driven ground and is bonded to the water within 5 feet of water entering the building.

plumber is going to leave the galvanized pipe in the ground more than 10' outside of structure

Question : if leaving the galvanized pipe with the bonding intact does there need to be another driven ground?

i'm thinking it is not required

your thoughts appreciated, BTW the code cycle is 2011
Click to expand...

it will be used as a second ground rod, old galvanized (metal) pipe will be abandoned with the bonding intact

from what i understand as long as i have two "ground rods" 25ohm is not required to be met

the frost line around here is 36" this is and older home so i'm guessing its deeper than 36", i will call and confer thanks for pointing that out :)
 
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