How Much Installation Space Do You Need?

12 Questions

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Space Quizzes & Trivia

Questions and Answers
  • 1. 
    1. Which of the following is not an enclosure type that protects against incidental contact with enclosed equipment?
    • A. 

      A. 3

    • B. 

      B. 4

    • C. 

      C. 5

    • D. 

      D. 6

  • 2. 
    2. In dwelling units, service equipment or panelboards that do not exceed 200 amperes, shall be permitted in spaces where the height of the working space is less than 6½ feet.
    • A. 

      True

    • B. 

      False

  • 3. 
    3. ______ is described as: admitting close approach; not guarded by locked doors, elevation, or other effective means.
    • A. 

      A. Readily accessible

    • B. 

      B. Accessible (as applied to equipment)

    • C. 

      C. Inaccessible

    • D. 

      D. Accessible (as applied to wiring methods)

  • 4. 
    4.    “Constructed or protected so that exposure to the weather will not interfere with successful operation” is ______.
    • A. 

      A. water resistant

    • B. 

      B. weatherproof

    • C. 

      C. watertight

    • D. 

      d. weather resistant

  • 5. 
    5. Which article of NFPA 70 covers general requirements for the examination and approval, installation and use, access to and spaces about electrical conductors and equipment; enclosures intended for personnel entry; and tunnel installations?
    • A. 

      A. 300

    • B. 

      B. 250

    • C. 

      C. 110

    • D. 

      d. 100

  • 6. 
    6. The following definition for “Spaces About Electrical Equipment” can be found where?: Access and working space shall be provided and maintained about all electrical equipment to permit ready and safe operation and maintenance of such equipment.
    • A. 

      A. 300.01

    • B. 

      B. 250.50

    • C. 

      C. 110.26

    • D. 

      d. 110.12

  • 7. 
    7. Working space for equipment operating at 1,000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing or maintenance while energized shall comply with ______. 
    • A. 

      A. 110.26(A)(1), (A)(2), (A)(3), and (A)(4)

    • B. 

      B. 300.52(A1 through A6)

    • C. 

      C. 100.66 (B)(1), (B)(2),(B)(3)

    • D. 

      d. All of the above

  • 8. 
    8. Where exposed live parts of 151-600 nominal voltage to ground exists on one side of the working space and no live or grounded parts exist on the other side of the working space, or exposed live parts exist on both sides of the working space that are effectively guarded by insulating materials, the minimum clearance permitted shall be ______.
    • A. 

      A. 3 feet

    • B. 

      B. 3.5 feet

    • C. 

      C. 4 feet

    • D. 

      D. 5 feet

  • 9. 
    9. By special permission, smaller working spaces shall be permitted where all exposed live parts operate at no greater than 77 volts dc.
    • A. 

      True

    • B. 

      False

  • 10. 
    10.  According to the code, where equipment operating at 601-1,000 volts nominal to ground exists, the clearance required shall be 5 feet when exposed live parts are on both sides of the working space.
    • A. 

      True

    • B. 

      False

  • 11. 
    11. According to Part II of Article 110, the width of the working space in front of electrical equipment shall be ______ or ______, whichever is greater.
    • A. 

      A. equivalent to the depth of the equipment panel / 36 in.

    • B. 

      B. half the width of the room / 5 feet

    • C. 

      C. 6½ feet / the width of the room

    • D. 

      D. the width of the equipment / 30 in.

  • 12. 
    12.  For large equipment operating at 1,200 amperes or more, when may a single entrance to the working space be permitted?
    • A. 

      A. Never

    • B. 

      B. When the operating voltage does not exceed 150 volts

    • C. 

      C. The depth of the working space is 1½ times that required by 100.26(A)(1)

    • D. 

      D. Only when there is a continuous and unobstructed way of egress travel.