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1. |
Revision. 110.12(A) Unused Openings "Cable and Raceways" replaced with "other than those intended". Unused Openings. Unused openings other than those intended for the operation of equipment, those intended for mounting purposes, or those permitted as part of the design for listed equipment, shall be closed to afford protection substantially equivalent to the wall of the equipment. Where metallic plugs or plates are used with nonmetallic enclosures, they shall be recessed at least 6mm (1/4 inch) from the outer surface of the enclosure.
Question: Unused openings in electrical equipment that are used for latches ____________ to be closed.
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a)
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Are required
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b)
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Are not required
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2. |
110.16 Flash Protection has been revised by adding the phrase "electrical equipment such as." Electricial equipment such as switchboards, panelboards, industrial control panels, and motor control centers that are in other than dwelling occupancies and are likely to require examination, adjustment, servicing, or maintenance while energized shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment.
Question: An enclosure containing a Type 1 surge protective device in other than a dwelling unit that is likely to require servicing shall be ______________________________________________________ .
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a)
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Marked to warn qualified persons of the potential electric arc flash hazards.
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b)
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Locked
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c)
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Labeled
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3. |
Table 430-91 moved to Section 110.20 and coverage has been expanded to include enclosures for switchboards, panelboards, industrial control panels, motor control centers, meter sockets, and motor controllers rated not over 600 volts. This table does not cover enclosures located in hazardous (classified) locations.
Question: What Type of enclosure is required for an indoor location for protection against falling dirt?
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a)
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1
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b)
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2
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c)
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4
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d)
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12
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e)
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All of the above
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4. |
Table 110.20 shall be used for selecting enclosures for use in specific locations other than hazardous locations. The enclosures are not intended to protect against conditions such as condensation, icing, corrosion, or contamination that may occur within the enclosure or enter via the conduit or unsealed openings.
Question: What Type of enclosure is required for outdoor use where subject to prolonged submersion?
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a)
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4X
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b)
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12
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c)
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6P
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5. |
110.22 Identification of Disconnecting Means. A new marking requirement has been added to (B) Engineered Series Combination systems. Where circuit breakers or fuses are applied in compliance with series combination ratings selected under engineering supervision and marked on the equipment as directed by the engineer, the equipment enclosure(s) shall be legibly marked in the field to indicate the equipment has been applied with series combination rating. The marking shall be readily visible and state as shown below.
Question: Where circuit breakers and fuses have series combination ratings selected under engineering supervision enclosures shall be marked ________________ to indicate the equipment has been applied with a series combination rating.
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a)
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at the factory
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b)
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at time of installation
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c)
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in the field
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6. |
110.6(C)(2) Large Equipment. This section has been revised and the phrase "and over 1.8 m (6 ft) wide" has been restored.
Question: A motor control center protected at 800 amperes but rated 1200 amperes that is over ______ is required to have access and egress from the working space at both ends of the equipment.
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a)
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10 feet wide
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b)
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6 feet wide
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c)
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15 feet wide
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7. |
110.26(C)(3) Entrance to and Egress from Working Space. Personnel Doors. Where equipment rated 1200 amperes or more that contains overcurrent devices, switching devices, or control devices is installed and there is a personnel door(s) intended for access and egress from the working space located less than 25 feet from the nearest edge of the working space the doors shall open outward, and be equipped with panic bars, pressure plates, or other devices that are normally latched but open under simple pressure.
Question: If a 1200 ampere motor control center is located in an electrical room and there is a door located less than 25 feet from the nearest edge of the work space the door shall be equipped with _______ .
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a)
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panic bars
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b)
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pressure plates
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c)
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other devices that are normally latched
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d)
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either a, b, or c
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8. |
110.26(G) Locked Electrical Rooms or Enclosures. This is a revision. The last sentence of 110.26 has been moved to a new section (G). Electrical Equipment rooms or enclosures housing electrical apparatus that are controlled by locks(s) shall be considered accessible to qualified persons.
Question: A locked room or enclosure is considered _________ to qualified persons.
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a)
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readily accessible
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b)
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accessible
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c)
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not accessible
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9. |
110.33(A) and (B) Enclosures and Access to working space. Personnel doors less than 25 feet from the working space shall swing outward with simple pressure.
Question: A door used by personnel to exit the work space that is less than 25 feet from the working space shall _______________ .
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a)
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swing outward with simple pressure
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b)
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swing inward and be locked
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c)
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swing outward but remain locked
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10. |
220.2(B) Continuity The continuity of a grounded conductor shall not depend on a connection to a metallic enclosure, raceway, or cable armor.
Question: The continuity of a grounded conductor shall not depend on a connection to a ___________________ .
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a)
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metallic enclosure
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b)
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raceway
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c)
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cable armor
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d)
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a, b, or c
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