NEC 300
A vertical run of 4/0 AWG copper shall be supported at intervals not exceeding _____.
100 ft >WRONG<
Cables laid in wood notches require protection against nails or screws by using a steel plate at least _____ in. thick, installed before the building finish is applied.
1/16
When installing PVC conduit underground without concrete cover, there shall be a minimum of _____ in. of cover.
18
Where direct-buried conductors and cables emerge from grade, they shall be protected by enclosures or raceways to a point at least _____ ft above finished grade.
8
"_____" is defined as the area between the top of direct-burial cable and the top surface of the finished grade.
Cover
In multiwire branch circuits, the continuity of the _____ conductor shall not be dependent upon the device connections.
Grounded
Spare or unused raceways shall be sealed with sealants _____ for use with the cable insulation, conductor insulation, bare conductor, shield, or other components.
Identified
For locations not specifically identified in Table 300.5, a lesser cover depth than required in Column 5 shall be permitted where specified in the installation instructions of a(n) _____ low-voltage lighting system.
Listed
Where Type NM cable passes through factory or field openings in metal members, it shall be protected by _____ bushings or _____ grommets that cover metal edges.
Listed
Metal raceways, cable armor, and other metal enclosures shall be _____ joined together into a continuous electric conductor so as to provide effective electrical continuity.
Mechanically >WRONG< electrically?
A _____, with an integral bushed opening shall be used at the end of a conduit or other raceway that terminates underground where the conductors or cables emerge as a direct burial wiring method.
Bushing or terminal fitting
True or False: Wiring methods and equipment installed behind suspended-ceiling panels shall be arranged and secured to allow access to the electrical equipment.
True
Which of the following metal parts shall be protected from corrosion?
ferrous metal elbows, boxes, and raceways
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
Where independent support wires of a suspended ceiling assembly are used to support raceways, cable assemblies, or boxes above a ceiling, they shall be secured at _____ end(s).
both
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.
raceway or sleeve
Raceways shall be _____ between outlet, junction, or splicing points prior to the installation of conductors.
installed complete
A(n) _____ is not a plenum space.
office space >WRONG< (mechanical room too?)
A listed expansion/deflection fitting or other approved means shall be used where a raceway crosses a _____ intended for expansion, contraction or deflection used in buildings, bridges, parking garages, or other structures.
structural joint
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
Wiring methods installed behind panels that allow access shall be _____ according to their applicable articles.
supported
All conductors of the same circuit, including the grounded and equipment grounding conductors and bonding conductors shall be contained within the same _____, unless otherwise permitted elsewhere in the NEC.
trench, raceway, or cable
A cable, raceway, or box installed under metal-corrugated sheet roof decking shall be supported so the top of the cable, raceway, or box is not less than _____ in. from the lowest surface of the roof decking to the top of the cable, raceway, or box.
1 1/2
The independent support wires for supporting electrical wiring methods in a fire-rated ceiling assembly shall be distinguishable from fire-rated suspended-ceiling framing support wires by _____.
Tagging, color, or other effective means
True or False: A box or conduit body shall not be required for conductors in handhole enclosures, except where connected to electrical equipment.
True
True or False: 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
True or False: 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
True or False: A bushing shall be permitted in lieu of a box or terminal where the conductors emerge from a raceway and enter or terminate at equipment such as open switchboards, unenclosed control equipment, or similar equipment.
True
True or False: Fittings and connectors shall be used only with the specific wiring methods for which they are designed and listed.
True
True or False: In general, areas where acids and alkali chemicals are handled and stored may present corrosive conditions, particularly when wet or damp.
True
True or False: Independent support wires used for the support of electrical raceways and cables within nonfire-rated assemblies shall be distinguishable from the suspended-ceiling framing support wires.
True
True or False: Prewired raceway assemblies shall be used only where specifically permitted in the NEC for the applicable wiring method.
True
Electrical equipment with _____ and having low smoke and heat release properties, and associated wiring material suitable for the ambient temperature can be installed within an air-handling space (plenum).
a metal enclosure or a nonmetallic enclosure listed for use within a plenum space
Cables or raceways installed using directional boring equipment shall be _____ for this purpose.
approved
Direct-buried conductors, cables, or raceways, which are subject to movement by settlement or frost, shall be arranged to prevent damage to the _____ or to equipment connected to the raceways.
enclosed conductors
Conductors of ac and dc circuits, rated 1,000V or less, shall be permitted to occupy the same _____ provided that all conductors have an insulation rating equal to the maximum voltage applied to any conductor.
enclosure, raceway, or cable
All conductors of the same circuit shall be _____, unless otherwise specifically permitted in the NEC.
in the same raceway or cable, or be in close proximity in the same trench
Cable wiring methods shall not be used as a means of support for _____.
nonelectrical equipment, raceways, or other cables
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 in. from
At least _____ support method(s) shall be provided for each conductor at the top of the vertical raceway or as close to the top as practical if the vertical rise exceeds the values in Table 300.19(A).
one
Backfill used for underground wiring shall not damage _____ or prevent adequate compaction of fill or contribute to corrosion.
raceways, cables or conductors
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 _____ in. outside the opening of the enclosure.
3
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 _____.
the environment in which they are to be installed
Where raceways are installed in wet locations above grade, the interior of these raceways shall be considered a _____ location.
wet
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. in thickness shall be used to protect the cable or tubing.
1/16
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
Direct-buried service conductors that are not encased in concrete and that are buried 18 in. or more below grade shall have their location identified by a warning ribbon placed in the trench at least _____ in. above the underground installation.
12
What is the minimum cover requirement for direct burial Type UF cable installed outdoors that supplies a 120V, 30A circuit?
24in.
What is the minimum cover requirement for Type UF cable supplying power to a 120V, 15A GFCI-protected circuit outdoors under a driveway of a one-family dwelling?
24in. >WRONG<
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
For locations not specifically identified in Table 300.5, a cover depth of _____ in. shall be permitted for pool, spa, and fountain lighting, installed in a nonmetallic raceway, limited to not more than 30V where part of a listed low-voltage lighting system.
6
Rigid metal conduit that is directly buried outdoors shall have at least _____ in. of cover.
6
Type UF cable used with a 24V landscape lighting system can have a minimum cover of _____ in.
6
_____ is a nonferrous, nonmagnetic metal that has no heating due to hysteresis heating.
Aluminum
Wiring methods permitted in the ceiling areas used for environmental air include _____.
Anything metallic and rated things
Raceways and cables installed into the _____ of open bottom equipment shall not be required to be mechanically secured to the equipment.
Bottom
"S" loops in underground direct burial _____ to raceway transitions, expansion fittings in raceway risers to fixed equipment, and, generally, the provision of flexible connections to equipment subject to settlement or frost heaves are recognized by the NEC.
Cables and conductors
Equipment and devices shall only be permitted within ducts or plenum chambers specifically fabricated to transport environmental air if necessary for their direct action upon, or sensing of, the _____.
Contained air
Type MC Cable listed for _____ is permitted to be installed underground under a building without installation in a raceway.
Direct burial
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, or in direct contact with the earth
When installed under metal-corrugated sheet roof decking, cables, raceways, and enclosures are permitted in concealed locations of metal-corrugated sheet decking type roofing if they are at least 2 in. away from a structural support member.
False. (1 1/2 in.?)
No wiring of any type shall be installed in ducts used to transport _____.
Flammable vapors, loose stock, or dust
_____ shall be permitted to support the wiring methods and equipment permitted to be used in other spaces used for environmental air (plenum).
Metal cable tray systems
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 (Plenum) 300.22(C)
Metal raceways shall not be _____ by welding to the raceway.
Supported, terminated, or connected by welding
True or False: Electrical 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.
Tru
Raceways can be used as a means of support of Class 2 circuit conductors or cables that connect to the same equipment.
True
Raceways shall be provided with expansion, expansion-deflection, or deflection fittings where necessary to compensate for thermal expansion, deflection, and contraction.
True
Raceways, cable assemblies, boxes, cabinets, and fittings shall be securely fastened in place.
True
When installed under metal-corrugated sheet roof decking, the rules for spacing from roof decking apply equally to rigid metal conduit and intermediate metal conduit.
True >WRONG<
The interior of underground raceways shall be considered a _____ location.
Wet
Conductors in ferrous metal raceways or 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.
all conductors
Openings around electrical penetrations into or through fire-resistant-rated walls, partitions, floors, or ceilings shall _____ to maintain the fire-resistance rating.
be firestopped using approved methods
Conductors in raceways shall be _____ between outlets, boxes, devices, and so forth.
continuous
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 _____.
electrical
Where nonmetallic wiring methods are subject to exposure to chemical solvents or vapors, they shall be inherently resistant to chemicals based upon their being _____ for the specific chemical reagent.
identified >WRONG<
Each direct-buried single conductor cable shall be located _____ in the trench to the other single conductor cables in the same parallel set of conductors, including equipment grounding conductors.
in close proximity
Conductors installed in nonmetallic raceways run underground shall be permitted to be arranged as _____ installations. The raceways shall be installed in close proximity, and the conductors shall comply with the provisions of 300.20(B).
isolated phase >WRONG<
Where Type NM cables pass through cut or drilled slots or holes in metal members, the cable shall be protected by _____ which are installed in the opening prior to the installation of the cable and which securely cover all metal edges.
listed grommets or listed bushings
Where exposed to sunlight, nonmetallic raceways, cable trays, boxes, cables with a nonmetallic outer jacket, fittings, and support hardware shall be _____.
listed or identified
Ferrous metal raceways, boxes, fittings, supports, and support hardware can be installed in concrete or in direct contact with the earth or other areas subject to severe corrosive influences, where _____ approved for the condition.
made of material
Where cables and nonmetallic 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 in. from
Wiring methods and cabling systems, listed for use in other spaces used for environmental air (plenums), shall be permitted to be installed in ducts specifically fabricated for environmental air-handling purposes _____.
only if necessary to connect to equipment or devices associated with the direct action upon or sensing of the contained air and if the total length of such wiring methods or cabling systems does not exceed 4 ft
The number and size of conductors permitted in a raceway is limited to _____.
prevent damage to insulation during installation and removal of conductors, and permit heat to dissipate
Short sections of raceways used for _____ shall not be required to be installed complete between outlet, junction, or splicing points.
protection of cables from physical damage
Conduits or raceways through which moisture may contact live parts shall be _____ at either or both ends.
sealed >WRONG< sealed and plugged?
