Nec 2014 handbook

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NEC 2014 handbook exhibit 250.22 does not show supplement grounding electrode mentioned in NEC 2014 Article 250.53(D)(2). Is it required in case of the exhibit 250.22?
 
I don't have a 2014 code book handy, but did look at exhibit 250.22 in the 2017 handbook and it does show a supplimentry electrode. With that being said, the exhibits in the handbook are not part of the NEC. They are there only to help you understand and relate the code. If the 2014 exhibit indeed doesn't show a supplimentry electrode, you are still required to install one if using metal underground water pipe as an electrode as referenced in 250.53 (D)(2).

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Jmccoll77 said:
I don't have a 2014 code book handy, but did look at exhibit 250.22 in the 2017 handbook and it does show a supplimentry electrode. With that being said, the exhibits in the handbook are not part of the NEC. They are there only to help you understand and relate the code. If the 2014 exhibit indeed doesn't show a supplimentry electrode, you are still required to install one if using metal underground water pipe as an electrode as referenced in 250.53 (D)(2).

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I dont have nec 2017 handbook so i cant see how that looks. At least I dont think supplemental electrode shown NEC 2014 exhibit 250.22. Is water pipe even used as grounding electrode exhibit 250.22 nec 2014? Where is supplemental electrode bonding shown nec 2017?

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codequestion said:
Where does supplemental electrode bonded within 5 feet from entrance of water pipe?

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Try wording your question so it can be understood.

Supplemental electrodes do not have a minimum or maximum distance from the water pipe GE

Roger
 
A water pipe is only used as an electrode if there is 10' of metallic pipe in contact with the earth. In that case it must be connected within 5' of where the pipe enters the building

250.68(C) Grounding Electrode Connections. Grounding electrode
conductors and bonding jumpers shall be permitted to
be connected at the following locations and used to extend
the connection to an electrode(s):
(1) Interior metal water piping located not more than 1.52 m
(5 ft) from the point of entrance to the building shall be
permitted to be used as a conductor to interconnect electrodes
that are part of the grounding electrode system.
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If there is plastic piping entering the building and the interior piping is metal then that can be bonded anywhere on the piping. The water pipe in case one is not a supplementary electrode. Ground rods are generally the supplemental electrodes.
 
Dennis Alwon said:
A water pipe is only used as an electrode if there is 10' of metallic pipe in contact with the earth. In that case it must be connected within 5' of where the pipe enters the building



If there is plastic piping entering the building and the interior piping is metal then that can be bonded anywhere on the piping. The water pipe in case one is not a supplementary electrode. Ground rods are generally the supplemental electrodes.
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Where the metal water pipe is used to extend connection per nec 2014 250.68(c)(1) , is supplemental electrode per nec 2014 250.53 (D)(2) required?

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Nec 2014 250.68 (c)(1) says water pipe located not more than 5 feet from the entrance to the building shall be permitted to be used as conductor.

However, you are saying past 5 feet. So as mentioned in 250.68 (c)(1) water pipe is an electrode?
Dennis Alwon said:
The metal pipe is not an electrode once you measure past 5' from where it enters the building.
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What section 250.68(C) is saying is that the electrode is the pipe in the ground however for the sake of making the connection the first 5' is considered a grounding electrode conductor so that you can connect you grounding electrode conductor to the electrode. I always looked at it as the 5' inside was the electrode... same thing just a different way to look at it. The code calls it a conductor and not an electrode.
 
Dennis Alwon said:
What section 250.68(C) is saying is that the electrode is the pipe in the ground however for the sake of making the connection the first 5' is considered a grounding electrode conductor so that you can connect you grounding electrode conductor to the electrode. I always looked at it as the 5' inside was the electrode... same thing just a different way to look at it. The code calls it a conductor and not an electrode.
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That part within 5 feet if used as conductor to extend GEC to other electode require supplemental electrode?

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codequestion said:
That part within 5 feet if used as conductor to extend GEC to other electode require supplemental electrode?

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Yes, connecting to a water line electrode does require another electrode. It does not have to be connected to that part of the piping. Earlier you were calling the water piping a supplementary electrode. It is not.
 
Dennis Alwon said:
Yes, connecting to a water line electrode does require another electrode. It does not have to be connected to that part of the piping. Earlier you were calling the water piping a supplementary electrode. It is not.
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Can that supplemental electrode be connected water pipe within 5 feet per nec 250.53 (D)(2) exception or I am interpreting that incorrectly? If incorrect then what is the meaning of 250.53 (D)(2) exception?

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Exactly what it says. What's the question? 250.53(D)(2) says to supplement the water pipe, and then tells you where you can land the bonding jumper for the supplemental electrode. The 5' of interior water piping is none of these things, and not an electrode; it is just a conductor. Therefore, the exception expressly permits the connection. It is a little redundant, but not contradictory.
 
George Stolz said:
Exactly what it says. What's the question? 250.53(D)(2) says to supplement the water pipe, and then tells you where you can land the bonding jumper for the supplemental electrode. The 5' of interior water piping is none of these things, and not an electrode; it is just a conductor. Therefore, the exception expressly permits the connection. It is a little redundant, but not contradictory.
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I connect my GEC from service disconnect neutral bus to underground water pipe within 5 feet of pipe entrance.

Now I connect bonding jumper from within 5 feet of entrace to building underground water pipe to concrete encased electrode.

Would the concrete encased electrode be considered as supplemental electrode?

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codequestion said:
I connect my GEC from service disconnect neutral bus to underground water pipe within 5 feet of pipe entrance.

Now I connect bonding jumper from within 5 feet of entrace to building underground water pipe to concrete encased electrode.

Would the concrete encased electrode be considered as supplemental electrode?

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Yes, in that case it would be supplemental. You can supplement the water ground with any of the means mentioned in 250.52(A)(2)-(A)(8)
 
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