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1. |
376.56(B)(4) Power Distribution Blocks in Wireways
Live parts Power distribution blocks shall not have uninsulated live parts exposed within a wireway, whether or not the cover is installed.
The words whether or not the cover is installed have been added.
Question: Power distribution blocks in wireways shall not have uninsulated live parts exposed within a wireway, _________________________.
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a)
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when used for pulling conductors into the wireway
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b)
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when the cover is open only
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c)
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whether or not the cover is installed
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2. |
376.100 NEW Construction requirements have been added for wireways. Listed wireways and auxiliary gutters are built to ANSI/UL Product Standard 870. Since wireways are not required to be listed construction requirements have been added. These requirements are identical to those found in 366.100 for auxiliary gutters
Construction
(A) Electrical and Mechanical Continuity.
Wireways shall be constructed and installed so that adequate electrical and mechanical continuity of the complete system is secured.
(B) Substantial Construction.
Wireways shall be of substantial construction and shall provide a complete enclosure for the contained conductors. All surfaces, both interior and exterior, shall be suitably protected from corrosion. Corner joints shall be made tight, and where the assembly is held together by rivets, bolts, or screws, such fasteners shall be spaced not more than 300 mm (12 in.) apart.
(C) Smooth Rounded Edges.
Suitable bushings, shields, or fittings having smooth, rounded edges shall be provided where conductors pass between wireways, through partitions, around bends, between wireways and cabinets or junction boxes, and at other locations where necessary to prevent abrasion of the insulation of the conductors.
(D) Covers.
Covers shall be securely fastened to the wireway.
Question: Wireways do not have to be listed and can be constructed but there are now construction requirements in ___________ .
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a)
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376.100
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b)
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366.100
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c)
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356.100
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3. |
378.12 Uses Not Permitted for Nonmetallic Wireways
Nonmetallic wireways shall not be permitted in any hazardous (classified) location, except as specifically permitted by other Articles in the NEC. This revision now permits nonmetallic wireways in hazardous locations if other Articles allow it.
Question: Nonmetallic wireways _____________ in any hazardous (classified) location, except as specifically permitted by other Articles in the NEC.
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a)
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shall be permitted
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b)
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shall not be permitted
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4. |
Article 382 Nonmetallic Extensions
A new definition and installation requirements for concealable nonmetallic extension have been added.
A new Part III has been added that covers construction specifications for concealable nonmetallic extensions.
Concealable nonmetallic extensions are required to be listed.
Click on the web reference to find more information.
Question: Concealable nonmetallic extensions are required to be ___________.
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Web Reference
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a)
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approved
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b)
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listed
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c)
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identified
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5. |
392.8(A) Cable splices are now permitted to project above the cable tray side rails where not subject to physical damage and where accessible.
Cable Splices
Cable splices made and insulated by approved methods shall be permitted to be located within a cable tray, provided they are accessible. Splices shall be permitted to project above the side rails where not subject to physical damage.
Question: Splices in cable trays shall be __________________ where not subject to physical damage.
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a)
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not be made
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b)
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made so they do not project above the side rails
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c)
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permitted to project above the side rails
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6. |
392.9(A)(1) Any Mixture of Cables in a ladder or ventilated trough cable tray. A new sentence has been added to ensure that cable trays are wide enough for the installed cables to meet spacing and ampacity requirements.
Where all of the cables are 4/0 AWG or larger, the sum of the diameters of all cables shall not exceed the cable tray width, and the cables shall be installed in a single layer.
NEW Where the cable ampacity is determined according to 392.11(A)(3), the cable tray width shall not be less than the sum of the diameters of the cables and the sum of the required spacing widths between the cables.
Question: Where the cable ampacity is determined according to 392.11(A)(3), the cable tray width _________than the sum of the diameters of the cables and the sum of the required spacing widths between the cables.
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a)
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shall be less
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b)
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shall not be less
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c)
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shall be more
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7. |
396.30 Requirements have been added for the Messenger used for Messenger Supported Wiring to address the requirements located in other parts of the Code.
396.30 If the Messenger used in Messenger Supported Wiring is used as a neutral it shall comply with the requirements of 225.4, 250.184(A), 250.184(B)(7), and 250.186(B).
If the Messenger used in Messenger Supported Wiring is used as an equipment grounding conductor it shall comply with the requirements of 250.32(B), 250.118, 250.184(B)(8), and 250.186(D).
Question: If the Messenger used for Messenger Supported Wiring
is used as a neutral it ________________ .
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a)
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shall comply with requirements located in other parts of the Code
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b)
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shall comply with requirements located in Article 250
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c)
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a and b
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8. |
New Article 626 Electrified Truck parking Spaces
Article 626 provides installation rules for truck stops that will supply electrical, communications, heating, and air conditioning services so that truck engines can be shut off and reduce fuel consumption and carbon emissions.
This Article has four Parts
Part I General
Part II Electrified Truck Parking Spaces Electrical Wiring Systems
Part III Electrified Truck parking Space Supply Equipment
Part IV Transport Refrigerated Units
It is estimated that these truck parking spaces will reduce the 1.2 billion gallons of diesel fuel consumed annually by idling.
Question: Article _________ is titled Electrified Truck parking Space.
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a)
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624
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b)
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626
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c)
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726
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9. |
NEW Article 708 Critical Operations Power Systems
This article addresses the requirements for facilities that are designated as mission critical in time of emergencies such as the 9/11 event and Katrina hurricane.
Annex E for Critical Operation Power Systems and Annex G for Supervisory Control and Data Acquisition (SCADA) have also been added to supplement Article 708.
Article 708 resulted from the formation of a special Task Group on Emergency and Standby Systems for Homeland Security and the work by the NFPA electrical engineering division.
Question: Article ______ is titled Critical Operations Power Systems.
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a)
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710
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b)
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708
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c)
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720
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10. |
Article 725 has been renumbered and reorganized to improve usability and consistency with the rest of the NEC.
Article 725 covers Class I, Class 2, and Class 3 Remote-Control, Signaling and Power Limited Circuits.
Question: Article 725 has been _____________ .
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a)
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deleted
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b)
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renumbered and reorganized
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c)
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moved
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