Deck 12: Raceway Installation

Question 1

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.

Answer 1

True

Question 2

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

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

Answer 2

C

Question 3

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 3

B

Question 4

The securing and supporting requirements for Type FMC are the same as those for Type NM cable.

Question 5

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

Question 6

Where only two conductors are installed in a raceway, the conduit cannot be filled to more than __________ of the conduit's cross-sectional area according to Table 1 in Chapter 9 of the NEC.

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

Question 7

Although they are not commonly used, threadless couplings and connectors can be used with Type RMC.

Question 8

Electrical metallic tubing (Type EMT) must be secured within 30 inches of every outlet box, junction box, cabinet, and conduit body.

Question 9

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

Question 10

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) daddle

Question 11

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

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

Question 12

The NEC defines Type __________ 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 13

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 14

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

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

Question 15

It is OK to use a metal fish tape to pull or push conductors in a raceway that is connected to an energized loadcenter.

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

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

Question 18

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 19

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

Question 20

Electricians often refer to Type RMC as "heavy wall" conduit.

Question 21

__________ 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 22

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

Question 23

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

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

Question 24

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

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

Question 25

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

Question 26

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

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

Question 27

When installing more than two conductors in a conduit or tubing, the maximum percentage of fill allowed by the NEC according to Table 1 in Chapter 9 is __________.

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

Question 28

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

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

Question 29

Any installation of liquidtight flexible metal conduit over ____________________ feet in length requires the installation of an equipment grounding conductor.

Question 30

The metric designator for 1/2-inch trade-size Type EMT is __________.

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

Question 31

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 32

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

Question 33

The __________ on a typical 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 34

The maximum number of 14 AWG conductors with THHN insulation that you could install in a 3/8-inch trade-size Type 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 35

The __________ on a typical 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 36

The __________ on a typical 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 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 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) Type FMC
D) All of the above

Question 39

According to Underwriters Laboratories, lengths of flexible metal conduit longer than __________ have not been judged suitable for equipment grounding purposes.

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

Question 40

Expansion fittings are generally provided in exposed runs of Type PVC 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 41

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

Question 42

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

Question 43

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 44

Explain the difference between Type FMC and Type AC or Type MC cable.

Question 45

Describe a conduit body.

Question 46

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 47

Explain the purpose of using cutting oil when threading conduit.