Raceways and Conductors

Question 1

Where exposed to the weather, raceways shall be ___________?

Answer 1

Listed or approved for use in wet locations and arranged to drain.
225.22

Question 2

Most conduit and tubing type raceways have a maximum equivalent of four _______ bends between pull points.

Answer 2

quarter bends (90 degree)

Question 3

The cross-sectional area of 2-inch EMT is ________ inches squared.

Answer 3

3.14
A=3.14 x r^2 (in this case r = 2)

Question 4

All cut ends of conduits shall be reamed or otherwise finished to remove rough edges. Where conduit is threaded in the field, a standard cutting die with a ________-inch taper per feet (1 in 16) shall be used.

Answer 4

3/4 inch
342.28 and 344.28

Question 5

Multioutlet assemblies shall not be ?

Answer 5

installed in hoistways.
380.12

Question 6

Splices and taps shall be permitted within a wireway provided they are accessible. The conductors, including splices and taps, shall not fill the wireway to more than _____ of its area at that point.

Answer 6

75 %
376.56(A)

Question 7

A ______ is a metal transverse raceway for electric conductors, providing access to predetermined cells of a cellular concrete floor, thereby permitting the installation of electric conductors from a distribution center to the floor cells.

Answer 7

Header
372.2

Question 8

In both exposed and concealed locations, where a cable or raceway-type wiring method is installed through bored holes in joist, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than _________ inches from the nearest edge of the wood member.

Answer 8

1 and 1/4 inch
300.4(A)(1)

Question 9

How many 14 AWG THHN conductors, including an equipment grounding conductor, can be installed in a 3/8 inch flexible metal conduit using inside fittings?

Answer 9

4
Table 348.22

Question 10

What is the maximum distance between supports for a straight run of 2 inch IMC made up with threaded couplings?

Answer 10

16 feet
342.30(B)(2) & Table 344.30(B)(2)

Question 11

The sum of cross-sectional areas of all contained conductors and cables at any cross section of a wireway shall not exceed _______ fill.

Answer 11

20%
376.22(A)

Question 12

Where conductors carrying alternating current are installed in ferrous metal raceways, they shall be so arranged as to avoid heating the surrounding metal by __________?

Answer 12

Induction
300.20(A)

Question 13

A ____________ is a type of surface, flush, or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at the factory.

Answer 13

Multioutlet Assembly
100

Question 14

Where practicable, contact between dissimilar metals anywhere in the system shall be avoided to eliminate the possibility of _____________.

Answer 14

Galvanic action
342.14

Question 15

What is the maximum number of 4 AWG THHN conductors permitted in 1 1/2 inch rigid metal conduit?

Answer 15

10
Anniex C

Question 16

Where the same 4 AWG conductor enters and then exists a wireway through conduit or tubing, the distance between those raceway entries shall not be less than ________ times the trade diameter of the larger raceway.

Answer 16

6 times for Angle and pulls
314.28(A)(1)

8 times for straight pulls
314.28(A)(2)

Question 17

All components of an exposed wiring system, installed where walls are frequently washed, must be mounted with a minimum of ________ inch airspace between components and the wall.

Answer 17

1/4 inch
300.6(D)