What is "at a structure"?

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tom baker said:
I like to use the water pipe as a GE. But until the 2005 NEC it always required an additional electrode.
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That's still the case, 250.53(D)(2).

tom baker said:
Even if the well casing is not a GE, I still bond to it.
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With the circuit EGC as per 250.112(M), or with a GEC from the service? Just curious. :)

Do you have the 10' text from the Washington State code handy to post?

amptech said:
You wouldn't need a ground rod at an outhouse, would you?
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Does the outhouse have a panelboard installed on it? :D

Thanks for the replies thus far, a lot of food for thought has been offered. :)
 
georgestolz said:
With an extension cord, all bets are off, would you agree?
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With regard to limiiting the differences in potential between the EGC of that extension cord's circuit and that hunk of metal that could possibly be included in the 250.50 system (but itsn't), yes. All bets are off in that case. Some degree of reason and prudence needs to enter at some point. For instance, I could take that extension cord to my neighbor's yard, or even down the block. It seems evident to me that the goal of 250.50 is to limit the difference in potential between the specific items in the 250.52 list, however, and not anything else that could possibly be introduced near the structure.
 
mdshunk said:
It seems evident to me that the goal of 250.50 is to limit the difference in potential between the specific items in the 250.52 list, however, and not anything else that could possibly be introduced near the structure.
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So would you say the CMP is going to let me ignore an grounding electrode located 20' from the house just because I can not touch it and another grounding electrode at the house?

I doubt it.

But at the same time my service and my neighbors service are withing 15' of each other but of course I do not run a bonding jumper between them.
 
iwire said:
So would you say the CMP is going to let me ignore an grounding electrode located 20' from the house just because I can not touch it and another grounding electrode at the house?.
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Can you describe the time where you were required or compelled to add an item from the 250.52 list that was 20' from the structure in the 250.50 system?
 
mdshunk said:
Can you describe the time where you were required or compelled to add an item from the 250.52 list that was 20' from the structure in the 250.50 system?
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(7) Other Local Metal Underground Systems or Structures. Other local metal underground systems or structures such as piping systems and underground tanks.
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250.52(A)(7) specifically lists underground metal well casings in the 2005 NEC if thy are not effectively bonded to a metal water pipe. In my experience plastic water line is used to connect to the house plumbing(either copper or plastic).

Tom
 
dcspector said:
Jim, good job. I still go with my first reply to you.....NO....a rod in itself is not a structure. and laughing is good for ones health. Merry Christmas
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It just points out a defect in how the code was written.They need to define structure a bit better.I guess 2 rods would be a duplex.

Merry christmas to all.
 
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