article 300 (7pg 71q) Flashcards
conductors shall be installed within a raceway, cable, or enclosure
True
300.3
all conductors of a circuit, including the grounded and equipment grounding conductors, shall be contained within the same _____, unless permitted elsewhere in the code
raceway
cable
trench
(all of these)
where cables or nonmetallic raceways are installed through bored holes in joists, rafters, or wood members, holes shall be bored so that the edge of the hole is ________ the nearest edge of the wood member
not less than 1-1/4” from
conductors of AC and DC circuits, rated 600V or less, can occupy the same ______ provided that all conductors have an insulation rating equal to the maximum voltage applied to any conductor
enclosure
cable
raceway
(all of these)
cables laid in wood notches require protection against nails or screws by using a steel plate at least _______ thick, installed before the building finish is applied
1/16”
where type NM cable passes through factory or field openings n metal members, it shall be protected by ______ bushings or _______ grommets that cover metal edges
listed or listed
where type NM cables pass through cut or drilled slots or holes in metal members, the cable shall be protected by _____ securely covering all metal edges fastened in the opening prior to installation of the cable
listed bushing or
listed grommets
where nails or screws are likely to penetrate nonmetallic-sheathed cable or ENT installed through metal framing members, a steel sleeve, steel plate, or steel clip not less than ______ in thickness shall be used to protect the cable or tubing
1/16”
wiring methods installed behind panels that allow access shall be _____ according to their applicable articles
supported
where cables and non-metalic raceways are installed parallel to framing members, the nearest outside surface of the cable or raceway shall be ________ the nearest edge of the framing member where nails or screws are likely to penetrate
not less than 1-1/4 “ from
TQ
cables or raceways installed under metal-corrugated sheet roof decking shall be supported so the nearest outside surface of the cable or raceway is not less than ____ from the nearest surface of the roof decking
1-1/2”
where raceways contain insulated circuit conductors _______- AWG and larger, the conductors shall be protected from abrasion during and after installation by a fitting that provides a smooth, rounded insulating surface
4 AWG
what is the minimum cover requirement for direct burial Type UF cable installed outdoors that supplies a 120 V, 30 A circuit
24”
300.5
rigid metal conduit that is directly buried outdoors shall have at least _____ of cover
6”
when installing PVC conduit underground without concrete cover, there shall be a minimum of ________ of cover
18”
what is the minimum cover requirement for type UF cable supplying power to a 120 V, 15 A GFCI-protected circuit outdoors under a driveway of a one-family dwelling?
12”
Type UF cable used with a 24V landscape lighting system can have a minimum cover of ________
6”
_________ is defined as the area between the top of direct-burial cable and the top surface of the finished grade
Coverthe
the interior of underground raceways shall be considered a ______ location
wet
where direct buried conductors and cables emerge from grade, they shall be protected by enclosures or raceways to a point at least _____ above finished grade
8 feet
TQ
direct-buried service conductors that are not encased in concrete and that are buried 18in or more below grade shall have their location identified by a warning ribbon placed in the trench at least _______above the underground installation
12”
direct-buried conductors or cables can be spliced or tapped without the use of splice boxes when the splice or tap is made in accordance with 110.14(B)
True
backfill used for underground wiring shall not _____
-damage the wiring method
-prevent compaction of the fill
-contribute to the corrosion of the racway
conduits or raceways through which moisture may contact live parts shall be _____ at either or both ends
sealed or plugged
when installing direct-buried cables, a ____ shall be used at the end of a conduit that terminates underground
terminal fitting OR bushing
300.5 H
all conductors of the same circuit shall be _____, unless otherwise specifically permitted in the code
-in the same raceway or cable
-in close proximity in the same trench
direct-buried conductors, cables, or raceways, which are subject to movement by settlement of frost, shall be arranged to prevent damage to the _________ or to equipment connected to the raceways.
enclosed conductors
cables or raceways installed using directional boring equipment shall be _____ for this purpose
approved
raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, elbows, couplings, fittings, supports, and support hardware shall be of materials suitable for _______
environment which to be installed
where corrosion protection is necessary for ferrous metal equipment and the conduit is threaded in the field, the threads shall be coated with a(n) _________, electrically conductive, corrosion-resistant compound
approved
which of the following metal parts shall be protected from corrosion
-ferrous metal raceways
-ferrous metal elbows
-ferrous boxes
aluminum raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, elbows, couplings, nipples, fittings, supports, and support hardware ____ shall be provided with supplementary corrosion protection.
-embedded or encased in concrete
-in direct contact with the earth
nonmetallic raceways, cable trays, boxes, cables with a nonmetallic outer jacket, fittings, and support hardware shall be ________
-listed as sunlight resistant
-identified as sunlight resistant
where nonmetallic wiring methods are subject to exposure to chemical solvents or vapors, they shall be inherently resistant to chemicals based upon their being ________
-listed for the chemical
-identified for the chemical
an exposed wiring system for indoor wet locations where walls are frequently washed shall be mounted so that there is at least a _____ between the mounting surface and the electrical equipment
1/4” in airspace
in general, areas where acids and alkali chemicals are handled and stored may present corrosive conditions, particularly when wet or damp
True
where portions of a cable raceway or sleeve are subjected to different temperatures and condensation is known to be a problem, the _____ shall be filled with an approved material to prevent the circulation of warm air to a colder section of the raceway or sleeve.
raceways or sleeve
raceways shall be provided with expansion fittings where necessary to compensate for thermal expansion and contraction
True
raceways or cable trays containing electric conductors shall not contain any pipe or tube for steam, water, air, gas, drainage, or any service other than _______
electric
where raceways are installed in wet locations above grade, the interior f these raceways shall be considered a _______ location
wet
metal raceways, cable armors, and other metal enclosures shall be ______ joined together into a continuous electric conductor so as to provide effective electrical continuity.
metallically
raceways, cable assemblies, boxes, cabinets, and fittings shall be securely fastened in place
True
where independent support wires of a ceiling assembly are used to support raceways, cable assemblies, or boxes above a ceiling, they shall be secured at _____ ends
both
electric wiring within the cavity of a fire-rated, floor-ceiling, or roof-ceiling assembly shall not be supported by the ceiling assembly or ceiling support wires.
True
the independent support wires for a wiring in a fire-rated ceiling assembly shall be distinguished from fire-rated suspended-ceiling framing support wires by _____
-color
-tagging
-other effective means
ceiling-support wires used for the support of a electrical raceways and cables within nonfire-rated assemblies shall be distinguishable from the suspended-ceiling framing support wires
False
raceways can be used as a means of support of Class 2 circuit conductors or cables that connect to the same equipment
True
cable wiring methods shall not be used as a means of support for _____
-other cables
-raceways
-nonelectrical equipment
metal or nonmetallic raceways, cable armors, and cable sheaths _____ between cabinets, boxes, fittings or other enclosures or outlets
shall be continuous
raceways and cables installed into the _____ of open-bottom equipment shall not be required to be mechanically secured to the equipment
bottom
conductors in raceways shall be _____ between outlets, boxes, devices, and so forth.
continuous
in multiwire branch circuits, the continuity of the _____ conductor shall not be dependent upon the device connections
grounded
when the opening to an outlet, junction, or switch point is less than 8 in. in any dimension, each conductor shall be long enough to extend at least _______ outside the opening of the enclosure
3”
fittings and connectors shall be used only with specific wiring methods for which they are designed and listed
true
a box or conduit body shall not be required where cables enter or exit from conduit or tubing that is used to provide cable support or protection against physical damage
True
a box or conduit body shall not be required for splices and taps in direct-buried conductors and cables as long as the splice is made with a splicing device that is identified for the purpose
true
a box or conduit body shall not be required for conductors in handhole enclosures
true
the number and size of conductors permitted in a raceway is limited to _____
-permit heat to dissipate
-prevent damage to insulation during installation
-prevent damage to insulation during removal of conductors
raceways shall be ______ between outlet, junction, or splicing points prior to the installation of conductors
installed complete
short sections of raceways used for ______ shall not be required to be installed complete between outlets, junction, or splicing points
protection of cables from physical damage
metal raceways shall not be ___________ by welding to the raceway
-supported
-terminated
-connected
a vertical run of 4/0 AWG copper shall be supported at intervals not exceeding ______
80 feet
300.19
conductors in ferrous metal raceways and enclosures shall be arranged so as to avoid heating the surrounding ferrous metal by alternating-current induction. to accomplish this, the ______conductor(s) shall be grouped together
-phase
-grounded
-equipment grounding
_______ is a nonferrous, nonmagnetic metal that has no heating due to hysteresis heating.
aluminum
electrical installations in hollow spaces, vertical shafts, and ventilation or air-handling ducts shall be made so that the possible spread of fire or products of combustion is not _______
substantially increased
openings around electrical penetrations through fire-resistant rated walls, partitions, floors, or ceilings shall _________to maintain the fire-resistance rating
be fire-stopped using approved methods
no wiring of any type shall be installed in ducts used to transport_____
-dust
-flammable vapors
-loose stock
equipment and devices shall only be permitted within ducts or plenum chambers used to transport environmental air if necessary for their direct action upon, or sensing of, the _______
contained air
the space above a hung ceiling used for environmental air-handling purposes is an example of _______ and the wiring limitations of _______ apply
other space used for environmental air, 300.22(C)
wiring methods permitted in the ceiling areas used for environmental air include ___________
-electrical metallic tubing
-FMC of only` 4 ft
-RMC without an overall nonmettalic covering
300.22
wiring methods and equipment installed behind suspended-ceiling panels shall be arranged and secured to allow access to the electrical equipment
True
