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Electrical Assessment Flashcards

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

Read the first 7 Electrical Assessment flashcards as text

  1. What is the maximum fill percentage for a conduit containing more than two conductors per NEC Chapter 9, Table 1?

    Answer: 40%

    Conduit with more than two conductors is limited to 40% fill per NEC Chapter 9, Table 1.

  2. A single conductor in a conduit may fill up to what percentage of the conduit's cross-sectional area?

    Answer: 53%

    NEC Chapter 9, Table 1 allows 53% fill for a single conductor.

  3. What is the maximum number of quarter (90°) bends allowed in one run of conduit between pull points?

    Answer: 4 (360° total)

    NEC 358.26 and similar articles limit a run to 360° total, equal to four quarter bends.

  4. For grounding electrode conductors, what is the minimum copper size required when connected to a metal underground water pipe with a 200A service?

    Answer: 4 AWG

    Per NEC Table 250.66, a service with 3/0 to 350 kcmil conductors requires a 4 AWG copper grounding electrode conductor.

  5. What is the minimum size copper grounding electrode conductor permitted to a ground rod (made electrode)?

    Answer: 6 AWG

    NEC 250.66(A) permits a 6 AWG copper conductor as the maximum required size to a single ground rod.

  6. When derating ampacity for ambient temperature above 30°C, you apply correction factors from which NEC location?

    Answer: Table 310.15(B)(1)

    Ambient temperature correction factors are found in NEC Table 310.15(B)(1).

  7. What is the standard burial depth for a residential 120/240V branch circuit in rigid metal conduit (RMC)?

    Answer: 6 in

    NEC Table 300.5 permits 6 in minimum cover for rigid metal conduit under most conditions.