Article 300. General Requirements for Wiring Methods and Materials

When installing PVC conduit underground without concrete cover, there shall be a minimum of _____ in. of cover. a. 6 b. 12 c. 18 d. 22

c. 18 300.5(A) and Table 300.5 Column 3

What is the minimum cover requirement for direct burial Type UF cable installed outdoors that supplies a 120V, 30A circuit? a. 6 in. b. 12 in. c. 18 in. d. 24 in.

d. 24 in. 300.5(A) and Table 300.5 Column 1

_____ is defined as the area between the top of direct-burial cable and the top surface of the finished grade. a. Notch b. Cover c. Gap d. none of these

b. Cover Table 300.5, Note 1

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. a. junction box b. structural joint c. cable tray d. unistrut hanger

b. structural joint 300.4(H)

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. 8 b. 6 c. 4 d. 2

c. 4 300.4(G)

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. raceway b. sleeve c. a or b d. none of these

c. a or b 300.7(A)

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. a. approved b. identified c. listed d. none of these

c. listed 300.4(B)(1)

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. a. 6 b. 12 c. 18 d. 24

a. 6 Table 300.5 Footnote b

Backfill used for underground wiring shall not damage _____ or prevent adequate compaction of fill or contribute to corrosion. a. raceways b. cables c. conductors d. all of these

d. all of these 300.5(F)

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. a. 1/16 b. 1/8 c. 1/4 d. 1/2

a. 1/16 300.4(A)(2)

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. a. 1/16 b. 1/8 c. 1/2 d. 3/4

a. 1/16 300.4(B)(2)

Type UF cable used with a 24V landscape lighting system can have a minimum cover of _____ in. a. 6 b. 12 c. 18 d. 24

a. 6 300.5(A) and Table 300.5 Column 5

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 in. from b. immediately adjacent to c. not less than 1/16 in. from d. 90º away from

a. not less than 1 1/4 in. from 300.4(A)(1)

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. a. not less than 1 1/4 in. from b. immediately adjacent to c. not less than 1/16 in. from d. 90º away from 300.4(D)

a. not less than 1 1/4 in. from 300.4(D)

Where raceways are installed in wet locations above grade, the interior of these raceways shall be considered a _____ location. a. wet b. dry c. damp d. corrosive

a. wet 300.9

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? a. 6 in. b. 12 in. c. 16 in. d. 24 in.

b. 12 in. 300.5(A) and Table 300.5 Column 4

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. a. approved b. labeled c. listed d. none of these

c. listed Table 300.5 Footnote a

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. corrosive locations b. wet locations c. the environment in which they are to be installed d.. none of these

c. the environment in which they are to be installed 300.6

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. a. listed bushings b. listed grommets c. plates d. a or b

d. a or b 300.4(B)(1)

Conduits or raceways through which moisture may contact live parts shall be _____ at either or both ends. a. sealed b. plugged c. bushed d. a or b

d. a or b 300.5(G)

All conductors of the same circuit shall be _____, unless otherwise specifically permitted in the Code. a. in the same raceway or cable b, in close proximity in the same trench c. the same size d. a or b

d. a or b 300.5(I) and 300.3(B)

Where exposed to sunlight, nonmetallic raceways, cable trays, boxes, cables with a nonmetallic outer jacket, fittings, and support hardware shall be _____. a. listed as sunlight resistant b. identified as sunlight resistant c. a and b d. a or b

d. a or b 300.6(C)(1)

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). a. neutral b. grounded conductor c. isolated phase d. all of these

d. all of these 300.3(B)(1) Ex

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 Code. a. raceway b. cable c. trench d. all of these

d. all of these 300.3(B); see 300.5(I)

Which of the following metal parts shall be protected from corrosion? a. Ferrous metal raceways. b. Ferrous metal elbows. c. Ferrous boxes. d. all of these

d. all of these 300.6(A)

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. a. enclosure b.cable c. raceway d. any of these

d. any of these 300.3(C)(1)

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. marked b. listed c. labeled d. approved

d. approved 300.6(A)

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 b. separation by insulated bushings c. separation by noncombustible tubing d. none of these

a. 1/4-in. airspace 300.6(D)

Rigid metal conduit that is directly buried outdoors shall have at least _____ in. of cover. a. 6 b. 12 c. 18 d. 24

a. 6 300.5(A) and Table 300.5 Column 2

The interior of underground raceways shall be considered a _____ location. a. wet b. dry c. damp d. corrosive

a. wet 300.5(B)