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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 minimum size copper grounding electrode conductor required for a service with 200-amp THHN copper conductors?

    Answer: #4 AWG

    Per NEC Table 250.66, a 200-amp service requires a minimum #4 AWG copper grounding electrode conductor.

  2. What is the maximum number of 12 AWG THHN conductors permitted in a 1/2-inch EMT conduit?

    Answer: 9

    NEC Chapter 9 fill tables allow 9 of the 12 AWG THHN conductors in 1/2-inch EMT at 40% fill.

  3. In a dwelling, receptacles installed within 6 feet of a wet bar sink must be protected by what device?

    Answer: GFCI

    NEC 210.8 requires GFCI protection for receptacles near sinks to protect against ground faults.

  4. What is the standard mounting height (to center) for a wall switch in a typical dwelling?

    Answer: 48 inches

    Switches are commonly mounted at 48 inches to center, though the NEC does not mandate a fixed height.

  5. Which color is required for the grounded (neutral) conductor in systems of 120/240 volts?

    Answer: White or gray

    NEC 200.6 requires the grounded conductor to be white or gray for sizes 6 AWG and smaller.

  6. What is the maximum overcurrent protection allowed for a 14 AWG copper conductor?

    Answer: 15 amps

    NEC 240.4(D) limits 14 AWG copper to a 15-amp overcurrent device.

  7. How many small-appliance branch circuits are required minimum in a dwelling kitchen?

    Answer: 2

    NEC 210.11(C)(1) requires at least two 20-amp small-appliance branch circuits for kitchen countertop receptacles.