Article 300 Homework

1 ½

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.

structural joint

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.

In the same raceway or cable or in close proximity in the same Trench

All conductors of the same circuit shall be ______, unless otherwise specifically permitted in the code.

Embedded or encased in concrete or in direct contact with the Earth

Aluminum raceways, cable trays, cable bus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, elbows, couplings, nipples, fittings, supports, and support hardware ______ shall be provided with supplementary corrosion protection.

1/16 in

Cables laid in wood notches require protection against nails or screws by using a steel plate at least ______ inches thick, installed before the building finish is applied.

Approved

Cables or raceways installed using Directional Boring equipment shall be ______ for this purpose.

Any of these (Enclosure, Cable, Raceway)

Conductors of AC and DC circuits, rated 1000 volts 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.

True

Conductors shall be permitted for use in any of the wiring methods recognized in Chapter 3 and as permitted in the NEC.

True

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).

enclosed conductors

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.

6

For locations not specifically identified in Table 300.5, a cover depth of ______ in. shall be permitted for pools, Spa, and Fountain lighting, installed in nonmetallic Raceway, limited to not more than 30 volts where part of a listed low voltage lighting system.

True

In general, areas where acids and alkalies chemicals are handled and stored may present corrosive conditions, particularly when wet or damp.

True

On a three-phase, 4-wire, wye circuit, where the major portion of the load consists of nonlinear loads, the neutral conductor shall be counted when applying 310.15(B)(3)(a) adjustment factors.

True

Raceways shall be provided with expansion, expansion deflection, or deflection fittings where necessary to compensate for thermal expansion, deflection, and contraction.

6

Rigid metal conduit that is directly buried Outdoors shall have at least ______ in. of cover.

Identified

Spare or unused Raceway shall be sealed with sealants ______ for use with the cable insulation, conductor insulation, bare conductor, Shield, or other components.

Wet

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

6

Type UF cable used with a 24 volt landscape lighting system can have a minimum cover of ______ in.

12 in

What is the minimum cover requirement for type UF cable supplying power to a 120 volt, 15 amp GFIC protected circuit outdoors under a driveway of a one-family dwelling?

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.

Approved

Where corrosion protection is necessary for ferrous metal equipment and the conduit is threaded in the field, the thread shall be coated with a(n) ______ electrically conductive, corrosion resistant compound.

8

Where direct buried conductors and cables emerge from grade, they shall be protected by enclosures or raceways to a point at least ______ feet above the finished grade.

Listed OR Identified

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.

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.

all of these (Ferrous boxes, Ferrous metal elbows, and Ferrous metal raceways)

Which of the following metal Parts shall be protected from corrosion?