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Electrical 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 flashcards as text

  1. What is the demand factor allowed for the first 3,000 VA of general lighting load in a dwelling?

    Answer: 100%

    NEC Table 220.42 applies 100% to the first 3,000 VA of dwelling general lighting load.

  2. Which type of conduit is NOT permitted to be used as an equipment grounding conductor by itself?

    Answer: Liquidtight flexible nonmetallic conduit (LFNC)

    LFNC is nonmetallic and cannot serve as an equipment grounding conductor; a separate EGC is required.

  3. What is the maximum length of a flexible cord used to supply a fixed appliance through a receptacle?

    Answer: No fixed maximum but must be suitable

    NEC 400.10 permits flexible cords where allowed, but they must be suitable and not concealed; no single universal maximum applies generically.

  4. In Table 310.16, what is the ampacity of 1/0 AWG copper THHN at 90°C?

    Answer: 170 amps

    Per NEC Table 310.16, 1/0 AWG copper at 90°C is rated 170 amps.

  5. What is the maximum standard overcurrent device rating that may protect a 6 AWG copper conductor at 75°C?

    Answer: 65 amps

    6 AWG copper at 75°C is rated 65 amps, the maximum protection per Table 310.16 before applying the next-size-up rule.

  6. A receptacle installed in a bathroom of a dwelling must be supplied by a branch circuit of what minimum rating?

    Answer: 20 amps

    NEC 210.11(C)(3) requires at least one 20-amp branch circuit for bathroom receptacles.

  7. Which NEC article specifically covers swimming pools, fountains, and similar installations?

    Answer: Article 680

    NEC Article 680 governs swimming pools, spas, fountains, and related installations.