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ELECTRIC 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.

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  1. What is the minimum size copper conductor permitted for a branch circuit supplying general-purpose receptacles in a dwelling?

    Answer: 14 AWG

    14 AWG copper is the minimum size for a 15-ampere general-purpose branch circuit.

  2. GFCI protection is required for receptacles installed in which of the following dwelling locations?

    Answer: Bathrooms

    Bathrooms require GFCI protection because of the presence of water.

  3. What is the standard color used to identify the grounded (neutral) conductor in a typical installation?

    Answer: White or gray

    White or gray identifies the grounded neutral conductor.

  4. The minimum burial depth for a residential 120-volt circuit under a driveway using rigid metal conduit is generally:

    Answer: 6 inches

    Rigid metal conduit may be buried at 6 inches under a residential driveway per NEC burial tables.

  5. Which device is designed to protect against arcing faults in dwelling bedroom circuits?

    Answer: AFCI

    AFCI (arc-fault circuit interrupter) protects against dangerous arcing faults.

  6. The ampacity of a conductor is primarily affected by all of the following EXCEPT:

    Answer: Conductor color

    Conductor color is for identification only and does not affect ampacity.

  7. What is the maximum number of 12 AWG THHN conductors permitted in a single device box before box fill calculations are exceeded depends on:

    Answer: Box volume in cubic inches

    Box fill is calculated from the box's volume in cubic inches versus the volume allowance per conductor.