Art 300 cont'

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?

12 in.

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

Wiring methods permitted in the ceiling areas used for environmental air include _____.

EMT, FMC, RMC, etc.

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

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 bushing or listed grommets

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

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

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

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 _____.

Color, tagging, other effective means

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

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

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

24 in.

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

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

True or False: When installed under metal-corrugated sheet roof decking, cables, raceways, and enclosures are permitted in concealed locations of met-al-corrugated sheet decking type roofing if they are at least 2 in. away from a structural support member.

False

True or False: 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.

False

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

Permit heat to dissipate, prevent damage in installation and removal

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

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

Supported

The interior of underground raceways shall be considered a _____ location.

Wet

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 cable or raceway