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Electricity 1: Devices, Circuits and Materials

Thomas Kubala

Chapter 18

WIRING MATERIALS - all with Video Answers

Educators

Chapter Questions

00:38

Problem 1

List five standard materials used in wiring.
a. __________
b. __________
c. __________
d. __________
e. __________

Ben Nicholson
Ben Nicholson
Numerade Educator

Problem 2

State five places where nonmetallic-sheathed cable cannot be used.
a. __________
b. __________
c. __________
d. __________
e. __________

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Problem 3

List five locations where armored cable cannot be used.

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Problem 4

State the difference between flexible armored cable and flexible metal conduit. __________

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Problem 5

List two applications of flexible metal conduit.
a. __________
b. __________

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Problem 6

State two applications where ENT may not be used.
a. __________
b. __________

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Problem 7

List two advantages of rigid nonmetallic tubing over metallic tubing.
a. __________
b. __________

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Problem 8

A piece of armored cable measures $3 / 4$ inch in diameter. Determine the minimum radius to which this cable may be bent.
a. __________
b. __________

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Problem 9

Explain why rigid galvanized conduit can be used in practically any wiring application.
a. __________
b. __________

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03:00

Problem 10

What is the principal use of surface metal raceway?
__________

Jennifer Stoner
Jennifer Stoner
Numerade Educator

Problem 11

What is the primary type of project in which flat conductor cable is used?
__________

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Problem 12

State two advantages of rigid aluminum conduit as compared to rigid galvanized conduit of the same size.
a. __________
b. __________

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Problem 13

In items 13 through 21, Select the best answer to complete each statement, and place the letter of your answer in the space provided.
The advantage of EMT over rigid conduit (same size) is that it. __________
a. is stronger.
b. is lighter.
c. has a larger external diameter.
d. resists mechanical damage better.
e. resists the corrosive action of water better.

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Problem 14

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
Conduit fittings are used for__________
a. flexible armored cable.
b. surface metal raceway.
c. EMT.
d. nonmetallic cable.
e. rigid metal conduit.

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Problem 15

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
An antishort bushing is used on __________
a. armored cable.
b. surface metal raceway.
c. EMT.
d. nonmetallic cable.
e. rigid metal conduit.

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Problem 16

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
The maximum distance from a box that nonmetallic-sheathed cable shall be stapled will not exceed
a. $1 / 2 \mathrm{ft}$.
d. five times the diameter.
b. $1 \mathrm{ft}$.
e. $4-1 / 2 \mathrm{ft}$.
c. $2 \mathrm{ft}$.

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Problem 17

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
For a given set of electrical installation requirements, the least expensive material to use is
a. surface metal raceway.
d. armored cable.
b. thinwall conduit.
e. flexible metal conduit.
c. nonmetallic-sheathed cable.

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Problem 18

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
The size of rigid metal conduit is determined by the
a. inside diameter.
b. outside diameter.
c. the radius of the bend that can be made.
d. style of pipe.
e. type of coating.

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Problem 19

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
ENT may be used in place of
a. flexible metal conduit.
b. surface metal raceway.
c. rigid metal conduit.
d. thinwall conduit.
e. flat conductor cable.

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Problem 20

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
Rigid nonmetallic conduit may not be
a. buried.
b. impact resistant.
c. encased in concrete.
d. used to support fixtures.
e. purchased with an extra-heavy wall.

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Problem 21

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
Flat conductor cable may be used in
a. homes.
b. hospitals.
c. offices.
d. schools.
e. wet locations.

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