Question 5014 of 844 · Washington 01 Journey Level Electrician Exam
Which of the following is NOT permitted to be used as a grounding electrode?
Exactly one answer is correct.
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Correct answer to question 5014
- B: Metal underground gas piping
Explanation
Metal underground gas piping systems are specifically prohibited as grounding electrodes. The other items are recognized electrodes. See 250.52(B).
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