Question 6008 of 844 · Washington 01 Journey Level Electrician Exam
Under NEC 2020 and 2023, where must a warning ribbon be placed for direct buried service conductors that are 18 in or more below grade and not encased in concrete?
Exactly one answer is correct.
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Correct answer to question 6008
- D: At least 12 in above the conductors
Explanation
Unencased direct buried service conductors installed 18 in or more below grade must have a warning ribbon in the trench at least 12 in above the installation. See 300.5(D)(3).
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