NM CID EL-1 Practice Questions - New Mexico CID EL-1 Electrical Distribution Systems, Including Transmission Lines Examination Exam

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NEC 2020 300.5(D)(3) requires a warning ribbon to be placed in the trench above underground service conductors, except when they are under at least 18 inches of concrete. The ribbon is located approximately:

directly on top of the conductors 12 inches below the conductors 12 inches above the underground installation at finished grade as a painted stripe

Correct Answer:

12 inches above the underground installation

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