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

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Direct-buried URD primary cables laid in a common trench without individual ducts are often described as random-lay. Compared with cable in conduit, random-lay construction:

never requires a concentric neutral still must meet NESC burial depth, separation from other utilities, and grounding rules, and is harder to replace after a failure is exempt from NESC Part 3 permits 6 inches of cover under a public street

Correct Answer:

still must meet NESC burial depth, separation from other utilities, and grounding rules, and is harder to replace after a failure

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