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L.E. > article 300 (7pg 71q) > Flashcards

article 300 (7pg 71q) Flashcards

1
Q

conductors shall be installed within a raceway, cable, or enclosure

A

True

300.3

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2
Q

all conductors of a circuit, including the grounded and equipment grounding conductors, shall be contained within the same _____, unless permitted elsewhere in the code

A

raceway
cable
trench

(all of these)

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3
Q

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

A

not less than 1-1/4” from

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4
Q

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

A

enclosure
cable
raceway

(all of these)

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5
Q

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

A

1/16”

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6
Q

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

A

listed or listed

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7
Q

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

A

listed bushing or
listed grommets

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8
Q

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

A

1/16”

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9
Q

wiring methods installed behind panels that allow access shall be _____ according to their applicable articles

A

supported

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10
Q

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

A

not less than 1-1/4 “ from

TQ

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11
Q

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

A

1-1/2”

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12
Q

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

A

4 AWG

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13
Q

what is the minimum cover requirement for direct burial Type UF cable installed outdoors that supplies a 120 V, 30 A circuit

A

24”

300.5

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14
Q

rigid metal conduit that is directly buried outdoors shall have at least _____ of cover

A

6”

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15
Q

when installing PVC conduit underground without concrete cover, there shall be a minimum of ________ of cover

A

18”

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16
Q

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?

A

12”

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17
Q

Type UF cable used with a 24V landscape lighting system can have a minimum cover of ________

A

6”

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18
Q

_________ is defined as the area between the top of direct-burial cable and the top surface of the finished grade

A

Coverthe

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19
Q

the interior of underground raceways shall be considered a ______ location

A

wet

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20
Q

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

A

8 feet

TQ

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21
Q

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

A

12”

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22
Q

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)

A

True

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23
Q

backfill used for underground wiring shall not _____

A

-damage the wiring method
-prevent compaction of the fill
-contribute to the corrosion of the racway

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24
Q

conduits or raceways through which moisture may contact live parts shall be _____ at either or both ends

A

sealed or plugged

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25
Q

when installing direct-buried cables, a ____ shall be used at the end of a conduit that terminates underground

A

terminal fitting OR bushing

300.5 H

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26
Q

all conductors of the same circuit shall be _____, unless otherwise specifically permitted in the code

A

-in the same raceway or cable
-in close proximity in the same trench

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27
Q

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.

A

enclosed conductors

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28
Q

cables or raceways installed using directional boring equipment shall be _____ for this purpose

A

approved

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29
Q

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 _______

A

environment which to be installed

30
Q

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

A

approved

31
Q

which of the following metal parts shall be protected from corrosion

A

-ferrous metal raceways
-ferrous metal elbows
-ferrous boxes

32
Q

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.

A

-embedded or encased in concrete
-in direct contact with the earth

33
Q

nonmetallic raceways, cable trays, boxes, cables with a nonmetallic outer jacket, fittings, and support hardware shall be ________

A

-listed as sunlight resistant
-identified as sunlight resistant

34
Q

where nonmetallic wiring methods are subject to exposure to chemical solvents or vapors, they shall be inherently resistant to chemicals based upon their being ________

A

-listed for the chemical
-identified for the chemical

35
Q

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

A

1/4” in airspace

36
Q

in general, areas where acids and alkali chemicals are handled and stored may present corrosive conditions, particularly when wet or damp

A

True

37
Q

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.

A

raceways or sleeve

38
Q

raceways shall be provided with expansion fittings where necessary to compensate for thermal expansion and contraction

A

True

39
Q

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 _______

A

electric

40
Q

where raceways are installed in wet locations above grade, the interior f these raceways shall be considered a _______ location

A

wet

41
Q

metal raceways, cable armors, and other metal enclosures shall be ______ joined together into a continuous electric conductor so as to provide effective electrical continuity.

A

metallically

42
Q

raceways, cable assemblies, boxes, cabinets, and fittings shall be securely fastened in place

A

True

43
Q

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

A

both

44
Q

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.

A

True

45
Q

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 _____

A

-color
-tagging
-other effective means

46
Q

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

A

False

47
Q

raceways can be used as a means of support of Class 2 circuit conductors or cables that connect to the same equipment

A

True

48
Q

cable wiring methods shall not be used as a means of support for _____

A

-other cables
-raceways
-nonelectrical equipment

49
Q

metal or nonmetallic raceways, cable armors, and cable sheaths _____ between cabinets, boxes, fittings or other enclosures or outlets

A

shall be continuous

50
Q

raceways and cables installed into the _____ of open-bottom equipment shall not be required to be mechanically secured to the equipment

A

bottom

51
Q

conductors in raceways shall be _____ between outlets, boxes, devices, and so forth.

A

continuous

52
Q

in multiwire branch circuits, the continuity of the _____ conductor shall not be dependent upon the device connections

A

grounded

53
Q

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

A

3”

54
Q

fittings and connectors shall be used only with specific wiring methods for which they are designed and listed

A

true

55
Q

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

A

True

56
Q

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

A

true

57
Q

a box or conduit body shall not be required for conductors in handhole enclosures

A

true

58
Q

the number and size of conductors permitted in a raceway is limited to _____

A

-permit heat to dissipate
-prevent damage to insulation during installation
-prevent damage to insulation during removal of conductors

59
Q

raceways shall be ______ between outlet, junction, or splicing points prior to the installation of conductors

A

installed complete

60
Q

short sections of raceways used for ______ shall not be required to be installed complete between outlets, junction, or splicing points

A

protection of cables from physical damage

61
Q

metal raceways shall not be ___________ by welding to the raceway

A

-supported
-terminated
-connected

62
Q

a vertical run of 4/0 AWG copper shall be supported at intervals not exceeding ______

A

80 feet

300.19

63
Q

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

A

-phase
-grounded
-equipment grounding

64
Q

_______ is a nonferrous, nonmagnetic metal that has no heating due to hysteresis heating.

A

aluminum

65
Q

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 _______

A

substantially increased

66
Q

openings around electrical penetrations through fire-resistant rated walls, partitions, floors, or ceilings shall _________to maintain the fire-resistance rating

A

be fire-stopped using approved methods

67
Q

no wiring of any type shall be installed in ducts used to transport_____

A

-dust
-flammable vapors
-loose stock

68
Q

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 _______

A

contained air

69
Q

the space above a hung ceiling used for environmental air-handling purposes is an example of _______ and the wiring limitations of _______ apply

A

other space used for environmental air, 300.22(C)

70
Q

wiring methods permitted in the ceiling areas used for environmental air include ___________

A

-electrical metallic tubing
-FMC of only` 4 ft
-RMC without an overall nonmettalic covering

300.22

71
Q

wiring methods and equipment installed behind suspended-ceiling panels shall be arranged and secured to allow access to the electrical equipment

A

True

L.E. (18 decks)

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