Question 5004 of 731 · Texas Journeyman Electrician Exam
Under the general rule, interior metal water piping located more than what distance from its point of entrance may NOT be used to interconnect electrodes that are part of the grounding electrode system?
Exactly one answer is correct.
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Correct answer to question 5004
- D: 5 ft
Explanation
Only the first 5 ft of interior metal water piping from the point of entrance may serve as a conductor interconnecting electrodes. An exception exists for certain industrial and commercial buildings under qualified maintenance. See 250.68(C)(1).
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