Deck 12: Raceway Installation

Question 1

Rigid Metal Conduit must be supported at least every __________ feet along a conduit run. (General Rule)

A) 3
B) 8
C) 10
D) 12

Answer 1

C

Question 2

To find the maximum number of conductors of the same size and insulation type permitted in various types and sizes of conduit, you would look in __________ of the National Electrical Code.

A) Chapter 8
B) Informative Annex C
C) Informative Annex D
D) the index

Answer 2

B

Question 3

Where only two conductors are installed in a raceway, the conduit cannot be filled to more than __________ of the conduit's cross-sectional area.

A) 25%
B) 31%
C) 40%
D) 55%

Answer 3

B

Question 4

Electrical Metallic Tubing (Type EMT) must be secured within 30" of every outlet box, junction box, cabinet, and conduit body.

Question 5

Section 300.9 states that when installing conduits above grade in a wet location (like outdoors on the side of a house), the interior of the conduit is considered a wet location.

Question 6

EMT must be supported at least every __________ along the run. (General Rule)

A) 3'
B) 5'
C) 10'
D) 12'

Question 7

Expansion fittings are generally provided in exposed runs of rigid pvc conduit where __________.

A) the run is long
B) the run is subject to large temperature variations during or after installation
C) expansion and contraction measures are provided for the building or other structures
D) All of the above

Question 8

The NEC considers horizontal runs of EMT supported by openings through framing members at intervals not greater than 10' and securely fastened within 3' of termination points to be properly supported.

Question 9

The NEC requires that a(n) __________ be used for the protection of conductors sized 4 AWG and larger installed in conduit.

A) antioxidant
B) coupling
C) locknut
D) insulated bushing

Question 10

The NEC defines __________ as an unthreaded thinwall raceway of circular cross section designed for the physical protection and routing of conductors and cables.

A) EMT
B) IMC
C) PVC
D) RMC

Question 11

A(n) __________ bend is a conduit bend that results in a conduit going over an object that is blocking the path of the run.

A) back-to-back
B) field
C) offset
D) saddle

Question 12

Schedule 80 rigid PVC conduit has a larger inside diameter than Schedule 40 rigid PVC conduit.

Question 13

Rigid Metal Conduit must be supported within __________ of outlet boxes, junction boxes, cabinets, and conduit bodies. (General Rule)

A) 8"
B) 10"
C) 12"
D) 36"

Question 14

According to Underwriters Laboratories, lengths of Flexible Metal Conduit longer than __________ have not been judged suitable for grounding purposes.

A) 6'
B) 8'
C) 10'
D) 12'

Question 15

The securing and supporting requirements for Flexible Metal Conduit are the same as those for Type NM cable.

Question 16

A(n) __________ bend is a conduit bend formed by two 90-degree bends with a straight length of conduit between the two bends.

A) back-to-back
B) field
C) offset
D) saddle

Question 17

The securing and supporting requirements for liquidtight flexible metal conduit (Type LFMC) are the same as which of the following?

A) Type NM cable
B) Type AC cable
C) Flexible Metal Conduit
D) All of the above

Question 18

A separate equipment grounding conductor must always be installed in runs of ENT.

Question 19

Nonmetallic sheathed cable is permitted to be run in a raceway.

Question 20

A(n) __________ bend is a conduit bend that is made with two equal-degree bends in such a way so the conduit changes elevation and avoids an obstruction.

A) back-to-back
B) field
C) offset
D) saddle

Question 21

The conduit bend used on the conduit ends when the conduit enters a box or other electrical enclosure that is surface mounted is called a(n) _________________________ bend.

Question 22

Three-point and four-point bends are types of __________ bends.

A) back-to-back
B) offset
C) saddle
D) None of the above

Question 23

RMC, IMC, EMT, and PVC conduits come in standard __________ foot lengths.

A) 5
B) 6
C) 8
D) 10

Question 24

____________________ is the amount that must be subtracted from a desired stub up height so the bend will come out right. This term relates to the use of EMT benders.

Question 25

The metric designator for 6" trade size rigid metal conduit is __________.

A) 100
B) 155
C) 175
D) 208

Question 26

The __________ on a conduit hand bender head is where you will place the middle bending mark when doing a three-point saddle bend.

A) arrow
B) rim notch
C) star point
D) hook

Question 27

When installing more than two conductors in a conduit or tubing, the maximum percentage of fill allowed by the NEC is __________.

A) 25
B) 31
C) 40
D) 60

Question 28

The __________ on a conduit hand bender head is where you will place the bending mark when doing a stub-up bend.

A) arrow
B) rim notch
C) star point
D) hook

Question 29

The number of bends in a conduit run from one box to another box cannot exceed a total of ____________________ degrees.

Question 30

The __________ on a conduit hand bender head is where you will place the bending mark when doing the second 90 degree bend of a back-to-back bend.

A) arrow
B) rim notch
C) star point
D) hook

Question 31

The most common conduit bend is a 90-degree bend also known as a(n) ____________________.

Question 32

ENT must be supported at intervals not exceeding __________ feet.(General Rule)

A) 10
B) 8
C) 5
D) 3

Question 33

Conduit systems must be completely installed before the electrical conductors are permitted to be pulled in.

Question 34

The metric designator for 1/2" trade size EMT is __________.

A) 12
B) 13
C) 16
D) 28

Question 35

The most common types of conduit bodies include which of the following?

A) L-shaped bodies ("Ells")
B) T-shaped bodies ("Tees")
C) C-shaped bodies ("Cees")
D) All of the above

Question 36

A steel fish tape should be used when pulling conductors through an installed conduit system and into an energized loadcenter.

Question 37

A(n) __________ plastic cap on the ends of rigid metal conduit designates inch trade sizes.

A) black
B) red
C) blue
D) None of the above

Question 38

The maximum number of 14 AWG conductors with THHN insulation that you could install in a 3/8" trade size FMC is __________ if the connector fittings are inside or __________ if the connector fittings are outside. (assume the use of a grounding conductor)

A) 1, 2
B) 3, 4
C) 4, 5
D) 5, 6

Question 39

__________ is the amount that must be subtracted from a desired stub-up height so the bend will come out right.

A) Sweep
B) Stub height
C) Saddle mark
D) Take up

Question 40

Any installation of Liquidtight Flexible Metal Conduit over ____________________ feet in length requires the installation of a grounding conductor.

Question 41

Explain the purpose of cutting oil when threading conduit.

Question 42

Describe the technique that must be used if the length of a conduit run is longer than the length of your longest fish tape.

Question 43

Describe a conduit body.

Question 44

List at least 5 raceway types that could be used in residential wiring.

Question 45

Explain the difference between Flexible Metal Conduit and Type AC or Type MC cable.