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NEC Code and Theory Flashcards

7 cards from real CME practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 NEC Code and Theory flashcards as text

  1. Under NEC Article 210, what is the maximum distance from a doorway that a receptacle outlet must be placed in a dwelling unit wall space?

    Answer: 6 feet

    NEC 210.52(A) requires receptacles within 6 feet of any doorway opening in dwelling unit wall spaces.

  2. What NEC article covers the installation of transformers and transformer vaults?

    Answer: Article 450

    NEC Article 450 covers transformers and transformer vaults, including their installation requirements.

  3. According to NEC 230.24, service-entrance conductors above a residential roof must maintain a minimum clearance of how many feet when the roof slope is less than 4 inches in 12?

    Answer: 3 feet

    NEC 230.24(A) Exception 2 allows a 3-foot clearance over roofs with a slope less than 4 in 12, provided the service drop doesn't pass more than 4 feet over the roof overhang.

  4. NEC 310.15 addresses conductor ampacity. When more than 3 current-carrying conductors are in a raceway, what correction factor applies at exactly 4-6 conductors?

    Answer: 0.80

    NEC Table 310.15(C)(1) specifies an 80% (0.80) adjustment factor when 4 to 6 current-carrying conductors are bundled together.

  5. Under NEC 404.2(C), a grounded conductor is NOT permitted to serve as the only means of grounding a metal enclosure for a switch. What does this rule require instead?

    Answer: A separate equipment grounding conductor must be run to the switch enclosure

    NEC 404.2(C) requires a separate equipment grounding conductor to be brought to single-pole switch enclosures, prohibiting sole reliance on the grounded (neutral) conductor.

  6. According to NEC 700.12, emergency system sources must be capable of supplying power within how many seconds of normal supply failure?

    Answer: 10 seconds

    NEC 700.12 requires emergency systems to restore power within 10 seconds of loss of normal supply.

  7. What is the minimum burial depth for Schedule 80 PVC conduit under a residential driveway per NEC Table 300.5?

    Answer: 6 inches

    NEC Table 300.5 allows Schedule 80 PVC conduit to be buried at only 6 inches under driveways at one- and two-family dwellings.