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JOURNEYMAN NEC 2020

NEC 2020 Journeyman Practice Test 7

Free Online Journeyman Electrician Practice Test — NEC 2020 Edition 7This free 30-question practice test covers NM, MC, AC, and EMT wiring methods, conduit and box fill calculations, and motor branch-circuit conductor and overcurrent protection sizing. All questions and explanations are based on the 2020 NEC.

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Yes — completely free with no account required. All questions include detailed explanations and NEC references.

Most state Journeyman exams have 80–100 questions covering NEC code, wiring methods, branch circuits, motor controls, and load calculations.

Most states require a 70–75% passing score. This practice test uses the same 70% pass threshold so you know where you stand.

Questions are written to the 2020 NEC. Check your state licensing board to confirm which edition your state has adopted.

How to Use This Practice Test

This NEC 2020 Journeyman Practice Test 7 has 30 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.

Tip: This is an open-book exam — tab your NEC index and Articles 210, 250, and 430 before you start.

Topics covered: Branch circuits, grounding, wiring methods, load calculations, and motors.
Passing score: 70–75% (most states). Aim for 80% on practice tests so the real exam feels easy.
Questions: 30 multiple-choice, one correct answer each

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45 min

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NEC 2020 Journeyman Practice Test 7 — Question List

Question 1: Type NM (nonmetallic-sheathed) cable is permitted for wiring in which of the following, per NEC 334.10(A)?

One- and two-family dwellings
Any high-rise building regardless of construction type
Hazardous location Class I areas
Embedded directly in poured concrete

NEC Reference: NEC 334.10(A)

Question 2: Per NEC 334.12(A), Type NM cable is NOT permitted to be installed in which of the following locations?

Embedded directly in poured concrete
Inside a one-family dwelling wall cavity
Run through bored holes in wood framing
In an attached garage of a dwelling

NEC Reference: NEC 334.12(A)

Question 3: Per NEC 334.24, the minimum bending radius for Type NM cable must not be less than what multiple of the cable diameter?

3 times
5 times
8 times
10 times

NEC Reference: NEC 334.24

Question 4: Per NEC 334.30(A), Type NM cable must generally be secured and supported at intervals not exceeding _____, and within 12 inches of every box or fitting.

3 feet
4.5 feet
6 feet
10 feet

NEC Reference: NEC 334.30(A)

Question 5: A run of NM-B cable has conductors rated 90°C internally, but per NEC 334.80 the final allowable ampacity of the cable must be determined using which ampacity column?

The 90°C column
The 75°C column
The 60°C column
Whichever column gives the highest ampacity

NEC Reference: NEC 334.80

Question 6: Compared to Type NM cable, Type MC (metal-clad) cable per NEC 330.10 is generally permitted in a much wider range of occupancies, including:

Commercial, industrial, and dwelling installations, indoors or outdoors
Only one-family dwellings
Only temporary wiring installations
Only signal and control circuits under 50 volts

NEC Reference: NEC 330.10(A)

Question 7: Per NEC 330.30(B), Type MC cable must generally be secured at intervals not exceeding _____, and within 12 inches of every box or termination.

4.5 feet
6 feet
8 feet
10 feet

NEC Reference: NEC 330.30(B)

Question 8: Per NEC 320.30, Type AC (armored) cable must generally be secured and supported at intervals not exceeding _____, and within 12 inches of every outlet box.

4.5 feet
6 feet
8 feet
10 feet

NEC Reference: NEC 320.30(B)

Question 9: Per NEC 358.10, electrical metallic tubing (EMT) is permitted for which of the following?

Exposed and concealed work in wet or dry locations
Only exposed work in dry locations
Only underground direct burial without protection
Only in Class I hazardous locations

NEC Reference: NEC 358.10

Question 10: Per NEC 358.30(A), EMT must be securely fastened within 3 feet of each outlet box, junction box, or termination, and supported at intervals not exceeding _____.

6 feet
8 feet
10 feet
12 feet

NEC Reference: NEC 358.30(A)

Question 11: Per NEC 358.26, the total number of bends between pull points in an EMT run must not exceed the equivalent of how many degrees?

180 degrees
270 degrees
360 degrees
450 degrees

NEC Reference: NEC 358.26

Question 12: Per NEC 358.12, EMT is restricted from installation in or under cinder concrete or cinder fill unless which condition is met?

It is never permitted under any circumstances
It is protected by 18 inches of cover or 2 inches of noncinder concrete, or corrosion protected
It is only permitted if painted any color
It is permitted with no restriction

NEC Reference: NEC 358.12(2)

Question 13: Per NEC Chapter 9, Table 1, when only a single conductor or cable is installed in a raceway, the maximum permitted fill is what percentage of the raceway's cross-sectional area?

31 percent
40 percent
53 percent
60 percent

NEC Reference: NEC Chapter 9, Table 1

Question 14: Per NEC Chapter 9, Table 1, when three or more conductors are installed in the same raceway, the maximum permitted fill is what percentage of the raceway's cross-sectional area?

31 percent
40 percent
53 percent
75 percent

NEC Reference: NEC Chapter 9, Table 1

Question 15: Per NEC Table 314.16(B), what is the required box fill volume allowance for each 14 AWG conductor?

1.75 cubic inches
2.00 cubic inches
2.25 cubic inches
2.50 cubic inches

NEC Reference: NEC Table 314.16(B)

Question 16: Per NEC Table 314.16(B), what is the required box fill volume allowance for each 12 AWG conductor?

2.00 cubic inches
2.25 cubic inches
2.50 cubic inches
3.00 cubic inches

NEC Reference: NEC Table 314.16(B)

Question 17: Per NEC 314.16(B)(4), a single-pole switch or duplex receptacle mounted on a single strap/yoke counts as how many conductor volume allowances toward box fill?

One
Two
Three
Four

NEC Reference: NEC 314.16(B)(4)

Question 18: A box contains four 12 AWG equipment grounding conductors from four different cables. Per NEC 314.16(B)(5), how many conductor volume allowances do these EGCs count as, in total?

Four
Two
One
Zero — EGCs are never counted

NEC Reference: NEC 314.16(B)(5)

Question 19: A device box contains one duplex receptacle, three 14 AWG circuit conductors, and two 14 AWG equipment grounding conductors. Using Table 314.16(B), what is the minimum required box fill volume?

10.00 cubic inches
12.00 cubic inches
14.00 cubic inches
8.00 cubic inches

NEC Reference: NEC Table 314.16(B)

Question 20: Per NEC 314.16(B)(1), which conductor is excluded from the box fill calculation?

A conductor that originates and terminates entirely within the box
A conductor that passes through the box without a splice
A conductor spliced to another conductor in the box
A conductor terminated on a device in the box

NEC Reference: NEC 314.16(B)(1)

Question 21: A single continuous-duty motor has a full-load current (FLC) of 28 amperes. Per NEC 430.22(A), what is the minimum required ampacity of the branch-circuit conductors?

28 amperes
35 amperes
42 amperes
56 amperes

NEC Reference: NEC 430.22(A)

Question 22: Per NEC 430.6(A)(1), when sizing motor branch-circuit conductors and short-circuit protection, the full-load current value used must come from:

The motor nameplate current
The NEC full-load current tables (430.247-430.250)
The utility meter reading
The motor's locked-rotor current only

NEC Reference: NEC 430.6(A)(1)

Question 23: A feeder supplies three motors with full-load currents of 10 A, 15 A, and 20 A. Per NEC 430.24, what is the minimum required feeder conductor ampacity?

45 amperes
50 amperes
56.25 amperes
62.5 amperes

NEC Reference: NEC 430.24

Question 24: Per NEC 430.32(A)(1), a continuous-duty motor rated more than 1 horsepower with a marked service factor of 1.15 may have its overload protection set at what maximum percentage of nameplate current?

110 percent
115 percent
125 percent
150 percent

NEC Reference: NEC 430.32(A)(1)

Question 25: Per NEC Table 430.52, what is the maximum standard rating, as a percentage of motor full-load current, for a dual-element (time-delay) fuse used for branch-circuit short-circuit and ground-fault protection of a general-purpose motor?

125 percent
175 percent
250 percent
300 percent

NEC Reference: NEC Table 430.52

Question 26: Per NEC Table 430.52, what is the maximum standard rating, as a percentage of motor full-load current, for an instantaneous-trip circuit breaker used for motor branch-circuit short-circuit protection?

250 percent
300 percent
800 percent
1000 percent

NEC Reference: NEC Table 430.52

Question 27: Per NEC Table 430.52, what is the maximum standard rating, as a percentage of motor full-load current, for an inverse-time circuit breaker used for a general-purpose motor?

175 percent
250 percent
300 percent
400 percent

NEC Reference: NEC Table 430.52

Question 28: Per NEC 430.102(A), an individual disconnecting means for a motor controller must be:

Located in sight from the controller
Located inside the motor housing only
Omitted entirely if the motor is under 1 horsepower
Located at the service equipment only, regardless of distance

NEC Reference: NEC 430.102(A)

Question 29: Per the Exception to NEC 430.102(B), if the disconnecting means for the motor itself is NOT located in sight from the motor and driven machinery, what is required instead?

The controller disconnect must be capable of being individually locked in the open position
No disconnect is required at all
A sign reading "Danger" is sufficient by itself
The motor must be rewired to under 1 horsepower

NEC Reference: NEC 430.102(B)

Question 30: The nonmetallic-sheathed cable commonly used for branch-circuit wiring in one- and two-family dwellings, and widely known in the trade by a brand-derived nickname, is designated by the NEC as:

Type NM-B
Type UF-B
Type MC
Type SE

NEC Reference: NEC Article 334

Key NEC References for This Test

Article	What It Covers
Art. 100	Definitions — know: feeder, branch circuit, OCPD, dwelling unit
Art. 210	Branch Circuits — GFCI/AFCI locations, circuit ratings, outlet spacing (most tested)
Art. 220	Load Calculations — dwelling unit standard method
Art. 250	Grounding & Bonding — GEC sizing, electrode system, EGC
Art. 310	Conductors — ampacity (Table 310.12), insulation, derate rules
Art. 430	Motors — conductor 125% FLA, OCPD 250% FLA, overloads, disconnects

Study Tip: Tab Articles 210, 250, and 430 in your NEC before the exam. Know the Table 310.12 ampacity values for 14, 12, 10, 8, 6, and 4 AWG copper.

NEC 2020 Journeyman Practice Test 7

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Key NEC References for This Test

NEC 2020 Journeyman Practice Test 7

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NEC 2020 Journeyman Practice Test 7 — Question List

Question 1: Type NM (nonmetallic-sheathed) cable is permitted for wiring in which of the following, per NEC 334.10(A)?

Question 2: Per NEC 334.12(A), Type NM cable is NOT permitted to be installed in which of the following locations?

Question 3: Per NEC 334.24, the minimum bending radius for Type NM cable must not be less than what multiple of the cable diameter?

Question 4: Per NEC 334.30(A), Type NM cable must generally be secured and supported at intervals not exceeding _____, and within 12 inches of every box or fitting.

Question 5: A run of NM-B cable has conductors rated 90°C internally, but per NEC 334.80 the final allowable ampacity of the cable must be determined using which ampacity column?

Question 6: Compared to Type NM cable, Type MC (metal-clad) cable per NEC 330.10 is generally permitted in a much wider range of occupancies, including:

Question 7: Per NEC 330.30(B), Type MC cable must generally be secured at intervals not exceeding _____, and within 12 inches of every box or termination.

Question 8: Per NEC 320.30, Type AC (armored) cable must generally be secured and supported at intervals not exceeding _____, and within 12 inches of every outlet box.

Question 9: Per NEC 358.10, electrical metallic tubing (EMT) is permitted for which of the following?

Question 10: Per NEC 358.30(A), EMT must be securely fastened within 3 feet of each outlet box, junction box, or termination, and supported at intervals not exceeding _____.

Question 11: Per NEC 358.26, the total number of bends between pull points in an EMT run must not exceed the equivalent of how many degrees?

Question 12: Per NEC 358.12, EMT is restricted from installation in or under cinder concrete or cinder fill unless which condition is met?

Question 13: Per NEC Chapter 9, Table 1, when only a single conductor or cable is installed in a raceway, the maximum permitted fill is what percentage of the raceway's cross-sectional area?

Question 14: Per NEC Chapter 9, Table 1, when three or more conductors are installed in the same raceway, the maximum permitted fill is what percentage of the raceway's cross-sectional area?

Question 15: Per NEC Table 314.16(B), what is the required box fill volume allowance for each 14 AWG conductor?

Question 16: Per NEC Table 314.16(B), what is the required box fill volume allowance for each 12 AWG conductor?

Question 17: Per NEC 314.16(B)(4), a single-pole switch or duplex receptacle mounted on a single strap/yoke counts as how many conductor volume allowances toward box fill?

Question 18: A box contains four 12 AWG equipment grounding conductors from four different cables. Per NEC 314.16(B)(5), how many conductor volume allowances do these EGCs count as, in total?

Question 19: A device box contains one duplex receptacle, three 14 AWG circuit conductors, and two 14 AWG equipment grounding conductors. Using Table 314.16(B), what is the minimum required box fill volume?

Question 20: Per NEC 314.16(B)(1), which conductor is excluded from the box fill calculation?

Question 21: A single continuous-duty motor has a full-load current (FLC) of 28 amperes. Per NEC 430.22(A), what is the minimum required ampacity of the branch-circuit conductors?

Question 22: Per NEC 430.6(A)(1), when sizing motor branch-circuit conductors and short-circuit protection, the full-load current value used must come from:

Question 23: A feeder supplies three motors with full-load currents of 10 A, 15 A, and 20 A. Per NEC 430.24, what is the minimum required feeder conductor ampacity?

Question 24: Per NEC 430.32(A)(1), a continuous-duty motor rated more than 1 horsepower with a marked service factor of 1.15 may have its overload protection set at what maximum percentage of nameplate current?

Question 25: Per NEC Table 430.52, what is the maximum standard rating, as a percentage of motor full-load current, for a dual-element (time-delay) fuse used for branch-circuit short-circuit and ground-fault protection of a general-purpose motor?

Question 26: Per NEC Table 430.52, what is the maximum standard rating, as a percentage of motor full-load current, for an instantaneous-trip circuit breaker used for motor branch-circuit short-circuit protection?

Question 27: Per NEC Table 430.52, what is the maximum standard rating, as a percentage of motor full-load current, for an inverse-time circuit breaker used for a general-purpose motor?

Question 28: Per NEC 430.102(A), an individual disconnecting means for a motor controller must be:

Question 29: Per the Exception to NEC 430.102(B), if the disconnecting means for the motor itself is NOT located in sight from the motor and driven machinery, what is required instead?

Question 30: The nonmetallic-sheathed cable commonly used for branch-circuit wiring in one- and two-family dwellings, and widely known in the trade by a brand-derived nickname, is designated by the NEC as:

Key NEC References for This Test

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