Chapter 7

Question 1

AC conductors installed in metal raceways or enclosures shall be arranged to provide induction heating of the metal raceways or enclosures.

Answer 1

False

Question 2

An example of a(n) ___ space used for environmental air is the space over a hung ceiling used for environmental air.

Answer 2

other

Question 3

Holes that are drilled into framing members to permit the installation of raceways or cables shall be at least ___” from the nearest edge of the wood member.

Answer 3

1-1/4

Question 4

Splices or taps are never permitted within a raceway.

Answer 4

false

Question 5

Article 300 applies to wiring that is part of equipment.

Answer 5

false

Question 6

___ is the shortest distance measured between a point on the top surface of any direct-buried conductor, cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover.

Answer 6

Cover

Question 7

Boxes or cabinets marked “___” can be installed outdoors.

Answer 7

rain tight, rainproof, outdoor type

Question 8

The inductive heating effect of metal is minimized by cutting ___ between the holes for conductors.

Answer 8

slots

Question 9

Seals shall be installed in spare or unused raceways and raceway systems whenever condensation is known to be a problem.

Answer 9

True

Question 10

Under certain conditions EGCs are permitted to be run separate from their associated circuit conductors.

Answer 10

True

Question 11

Cables and conductors installed on the side of a pole or building shall be protected up to ___’ above finished grade.

Answer 11

none of the above

Question 12

Under certain conditions conductors of different systems (1000 V or less, AC and DC) may occupy the same raceway.

Answer 12

True

Question 13

In an indoor wet location, the electrical panelboard metal enclosure shall be at least ___” from the masonry wall.

Answer 13

1/4”

Question 14

Cables and raceways in or under airport runways shall be buried to a minimum depth of ___”.

Answer 14

18”

Question 15

At least ___” of free conductor shall be left at each outlet, junction, or switch point.

Answer 15

6”

Question 16

When a conduit contains three or more conductors, the cross-sectional area of the conductors shall not exceed ___% of the internal cross-sectional area of the conduit.

Answer 16

40%

Question 17

The continuity of the grounded conductor of a multiwire branch circuit shall never depend upon device connections.

Answer 17

True

Question 18

The minimum cover for a direct-buried cable in a location not specified in Table 300.5 is ___”.

Answer 18

24”

Question 19

Raceway systems are always permitted to be used to support other raceways, cables, or nonelectric equipment.

Answer 19

False

Question 20

Where required, cables or raceways in notches of framing members shall be protected from nails or screws by a steel plate at least ___ “ thick.

Answer 20

1/16”

Question 21

All cables and conductors emerging from the ground shall be protected from physical damage to a maximum depth of ___” below finished grade.

Answer 21

18”

Question 22

Cables and raceways installed under streets, highways, roads, driveways, and parking lots shall be buried to a minimum depth of ___”.

Answer 22

24”

Question 23

Per Table 300.5, RMC shall be buried under 12” of earth beneath a highway.

Answer 23

False

Question 24

Copper conductors in a vertical raceway require more supports than an equivalent length of aluminum conductors.

Answer 24

True