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Electrical Systems & Wiring Installation Flashcards

7 cards from real CPI 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 Systems & Wiring Installation flashcards as text

  1. What is the maximum number of current-carrying conductors permitted in a conduit before derating is required per NEC?

    Answer: 3

    NEC requires derating when more than 3 current-carrying conductors are bundled or in a conduit.

  2. Which wire gauge is the minimum required for a 20-amp branch circuit in a residential installation?

    Answer: 12 AWG

    12 AWG copper wire is the minimum size rated to safely carry 20 amps continuously.

  3. A GFCI outlet is required within how many feet of a kitchen sink per NEC requirements?

    Answer: 6 feet

    NEC requires GFCI protection for receptacles within 6 feet of a kitchen sink.

  4. What color is the grounding conductor in standard US residential wiring?

    Answer: Green or bare

    Equipment grounding conductors must be green, green with yellow stripe, or bare copper per NEC.

  5. When installing EMT conduit, what is the maximum distance allowed between supports in a vertical run?

    Answer: 10 feet

    NEC 358.30 allows EMT to be supported at intervals not exceeding 10 feet for vertical runs.

  6. What does the term 'load side' refer to in an electrical panel installation?

    Answer: The conductors and devices fed by the panel

    The load side refers to the conductors, devices, and equipment that receive power from the panel or breaker.

  7. Which type of conduit is NOT approved for use in concrete encasement?

    Answer: ENT (Electrical Nonmetallic Tubing)

    ENT (smurf tube) is not listed for direct concrete encasement; it is for use in walls and ceilings only.