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I was taught the cold water main needs to be bonded within 5' of entering a home, and that the water heater needs to be bonded around separately and run back to the panel. I am looking throughout 250 and can't find either of those requirements, only that the cold water needs to be bonded somewhere and the other pipes can be bonded to one of the grounding electrodes, not necessarily back to the disconnect.

So what I'm understanding is that you can bond the CW wherever is most convenient to tie into it, and then bond around the water heater, saying that the CW line is a grounding electrode (since the lateral is buried for over 10') and therefore you don't need to bring the water heater bonding line back to the panel.

Am I wrong?
 

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I was taught the cold water main needs to be bonded within 5' of entering a home, and that the water heater needs to be bonded around separately and run back to the panel. I am looking throughout 250 and can't find either of those requirements, only that the cold water needs to be bonded somewhere and the other pipes can be bonded to one of the grounding electrodes, not necessarily back to the disconnect.

So what I'm understanding is that you can bond the CW wherever is most convenient to tie into it, and then bond around the water heater, saying that the CW line is a grounding electrode (since the lateral is buried for over 10') and therefore you don't need to bring the water heater bonding line back to the panel.

Am I wrong?
I believe that you may be confused about bonding the CW pipe. The cold water line...if it is in contact with the earth for at least 10 feet must be used as a grounding ELECTRODE. And it must be connected via proper clamps to the neutral of the service. That is not bonding...it is grounding.
 

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If it's 10' or more, it needs to be used as an electrode.
The hydrant issue is interesting. Usually the water supply piping is grounded. The fact that a hydrant supply piping is not the supply to the premises may be up to discussion but not for me. I agree with you, it should be used as an electrode...and NOT just bonded.
 

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I've never ran any type of ground to a water heater. What we always do is jump the hot and cold because somewhere in 250 it says it needs to be continuous or something like that.
 

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I've never ran any type of ground to a water heater. What we always do is jump the hot and cold because somewhere in 250 it says it needs to be continuous or something like that.
Are you saying that you have not taken an EGC to the shell of the water heater?
 
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