Question 6008 of 749 · Maryland Journeyperson 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.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
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).
More questions: Wiring Methods, Conductors and Boxes
- 6010What does the Code require for backfill around underground cables and raceways?
- 6012When a cable is installed through a bored hole in a wood stud, how far must the edge of the hole be from the nearest edge of the stud unless a steel plate is used?
- 6013NM cable passes through holes in metal studs that are punched at the factory. What must be done?
- 6014A cable run parallel to a wood framing member must be kept at least how far from the nearest edge of the member where nails or screws are likely to penetrate?
- 6015Under NEC 2020 and 2023, a cable run under metal-corrugated sheet roof decking must be kept at least how far from the lowest surface of the decking?
- 6017Where ungrounded conductors 4 AWG or larger enter an enclosure through a raceway, what is required at the entry?