Old Man Moderator in Chief
If anyone wants a copy of NCDOI official interpretation of some commonly disputed sections in the 2017 NEC then click on the link below. I advise you to download it into word and the links should work. The links just take you to other areas of the document. Move your mouse to the link then use ctrl and click to activate the link.
NCDOI Formal Interpretation
Last edited by Dennis Alwon; 10-10-18 at 04:34 PM.
They say I shot a man named Gray and took his wife to Italy
She inherited a million bucks and when she died it came to me
I can't help it if I'm lucky
Moderator
Dennis that's for the 2017 NEC? I think that you had a typo in your post.
Rob
Moderator
All responses based on the 2014 NEC unless otherwise noted
Old Man Moderator in Chief
Why didn't you fix it? lolOriginally Posted by infinity
Dennis that's for the 2017 NEC? I think that you had a typo in your post.
Thanks I got it
They say I shot a man named Gray and took his wife to Italy
She inherited a million bucks and when she died it came to me
I can't help it if I'm lucky
Moderator
I found this question and answer interesting:
Question 2:
If a metal underground water pipe is used as part of an electrode system and is supplemented with a ground rod, is another grounding electrode required to supplement the supplemented ground rod?
Answer 2:
No. The requirement of section 250.53(D)(2) requires one supplement electrode of a type chosen from sections 250.52(A)(2) through (A)(8), in which a rod is listed in section 250.52(A)(5).
Both the water pipe and the rod must comply with the installation requirements of section 250.53(A). Because the water pipe and the rod make two electrodes, each supplement the other; thus, 250.53(A)(2) is satisfied.
Rob
Moderator
All responses based on the 2014 NEC unless otherwise noted
Senior Member
Oooo. I LIKE it.
I found this question and answer interesting:
Question 2:
If a metal underground water pipe is used as part of an electrode system and is supplemented with a ground rod, is another grounding electrode required to supplement the supplemented ground rod?
Answer 2:
No. The requirement of section 250.53(D)(2) requires one supplement electrode of a type chosen from sections 250.52(A)(2) through (A)(8), in which a rod is listed in section 250.52(A)(5).
Both the water pipe and the rod must comply with the installation requirements of section 250.53(A). Because the water pipe and the rod make two electrodes, each supplement the other; thus, 250.53(A)(2) is satisfied.
Another Al in Minnesota
Moderator
Not sure how a water pipe is supplementing a single ground rod when the water pipe gets changed to plastic.
Rob
Moderator
All responses based on the 2014 NEC unless otherwise noted
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