Nec Chapter 1

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  • 1/15 Questions

         When the word conductor is used in the NEC and the type of conductor material is not specified, the NEC requirement is for ________________.

    • Aluminum
    • Copper
    • Copper or aluminum
    • Insulated
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Nec Chapter 1 - Quiz
About This Quiz

This NEC Chapter 1 quiz assesses knowledge on key aspects of electrical installations, including conductor materials, workspace requirements, equipment labeling, and system identification. It ensures adherence to NEC standards, enhancing safety and compliance in electrical engineering.

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  • 2. 

    Electrical equipment shall be installed in a ____ and workmanlike manner

    • Tidy

    • Secure

    • Neat

    • None of the above

    Correct Answer
    A. Neat
    Explanation
    110.12

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  • 3. 

         The minimum headroom working space about a switchboard in a commercial installation is _________ feet.

    • 6 1/2 feet

    • 8 feet

    • 6 feet

    • 10 feet

    Correct Answer
    A. 6 1/2 feet
    Explanation
    section: 110.26 (E)

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  • 4. 

    Switchboards, panelboards, industrial control panels, meter socket enclosures and motor control center that are in the other than dwelling occupancies and are likely to require examination, adjustment, servicing, or maintenance while energized shall be ____ to warn qualified persons of potential electric arc flash hazards

    • Field marked

    • Painted red

    • Locked

    • Elevated from grade level

    Correct Answer
    A. Field marked
    Explanation
    110.15

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  • 5. 

    On all four wire delta connected systems where the midpoint of one is grounded, the high leg shall be identified with the color___?

    • Red

    • Blue

    • Yellow

    • Orange

    Correct Answer
    A. Orange
    Explanation
    110.15

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  • 6. 

        All listed or labeled equipment shall be installed and used in accordance with any __________ included in the listing or labeling.

    • Standards

    • Labeling

    • Instructions

    • None of the above

    Correct Answer
    A. Instructions
    Explanation
    section: 110.3(B)

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  • 7. 

    Conductors and equipment required or permitted by this code shall be acceptable only if

    • Listed

    • Approved

    • Labeled

    • Suitable

    Correct Answer
    A. Approved
    Explanation
    110.2

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  • 8. 

    The with of the working space in front of the electric equipment shall be the width of the equipment or ___ inches, whichever is greater

    • A. 48 inches

    • B. thirty inches

    • C. twenty four inches

    • D. thirty six

    Correct Answer
    A. B. thirty inches
    Explanation
    110.26 (A)(2)

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  • 9. 

    Round access openings in manholes shall not be less than ____ inches in diameter.

    • A. Twenty six

    • B. thirty

    • C. thirty six

    • D. forty

    Correct Answer
    A. A. Twenty six
    Explanation
    110.75(A)

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  • 10. 

    Where indoor electrical installations of electrical equipment rated at over 600V nominal are accessible to unqualified persons, the installation must be made with ___ equipment

    • A. nonmetallic

    • B. fire rated

    • C. metal enclosed

    • D. listed

    Correct Answer
    A. C. metal enclosed
    Explanation
    110.31(B)(1)

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  • 11. 

    ____ plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used to secure electrical equipment

    • Metal

    • Plastic

    • Copper

    • Wooden

    Correct Answer
    A. Wooden
    Explanation
    110.13 (A)

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  • 12. 

    Equipment intended to interrupt current at fault levels shall have a (n) ______ sufficient for the nominal circuit voltage and the current that is available at the line terminals of the equipment

    • Nominal rating

    • Interrupting rating

    • Overcurrent device

    • Internal capacity

    Correct Answer
    A. Interrupting rating
    Explanation
    110.9

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  • 13. 

    Unused cable or raceway openings in boxes, auxiliary gutters, cabinets, cutout boxes, meter socket enclosures, equipment cases, or housing shall be  effectively ____ to afford protection substantially equivalent to the wall of the equipment.

    • Closed

    • Blanked

    • Covered

    • Sealed

    Correct Answer
    A. Closed
    Explanation
    110.12 (A)

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  • 14. 

    Unused current transformers associated with potentially energized circuits shall be __?

    • A. short circuit

    • B. removed

    • C. tagged

    • D. grounded

    Correct Answer
    A. A. short circuit
    Explanation
    110.23

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  • 15. 

    Electrical connections in the form of wire connectors (nuts) or splicing installed on conductors for direct burial shall be ___ for such use

    • Approved

    • Labeled

    • Marked

    • Listed

    Correct Answer
    A. Listed
    Explanation
    110.14(B)

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 10, 2011
    Quiz Created by
    Morozco8

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