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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 31

Free Online Journeyman Electrician Exam Practice Test — 31This free 30-question practice test covers a wide range of journeyman electrician exam topics based on the 2023 NEC. Topics include branch circuit load calculations, motor circuit protection, GFCI requirements, conductor identification, wiring methods, grounding rules, and basic electrical theory including Ohm's Law, series/parallel circuits, and power factor.

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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 2023 NEC. Check your state licensing board to confirm which edition your state has adopted.

Before you start, review these key rules: In retail stores, each receptacle counts as 180 VA for load calculation (NEC 220.14(I)). Dwelling unit general lighting = 3 VA per square foot (NEC Table 220.12). Motor branch circuit conductors must be rated at least 125% of motor FLC (NEC 430.22(A)). An inverse time circuit breaker for a motor circuit is rated at a maximum of 250% of motor FLC (NEC Table 430.52). GFCI protection is required in dwelling unit bathrooms (NEC 210.8(A)(1)). No point along a dwelling unit wall may be more than 6 feet from a receptacle (NEC 210.52(A)). Rigid metal conduit (RMC) buried underground only requires 6 inches of cover (NEC Table 300.5). In a purely capacitive circuit, current leads voltage by 90 degrees.

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Journeyman Electrician Practice Test 31 — Question List

Question 1: What is the calculated load on a branch circuit for 10, 15-ampere receptacles in a retail store?

1800 volt-ampere
1600 volt-ampere
2400 volt-ampere
1400 volt-ampere

NEC Reference: NEC 220.14(I)

Question 2: How many 20 Amp circuits are required for a 2500 sq.ft dwelling unit?

NEC Reference: NEC 220.12

Question 3: What is the best used conductor to carry current in electric circuit unless it is specified?

Copper
Aluminum
Bronze

Question 4: The dis-connector switch rating for motor loads is kept lower than motor branch conductor to permit the motor to start.

True
False

Question 5: Which of the following electrical parameter remains unchanged in a series electrical circuit?

Voltage
Current
Power

Question 6: An LED light of 200W is supplied by a 120 volts electrical supply. what is the resistance ?

72 ohms
0.138 ohms
0.6 ohms
1.67 ohms

Question 7: The load on a cord-and-plug-connected receptacle shall not exceed _____ percent of the receptacle rating.

NEC Reference: NEC 210.21(B)(2)

Question 8: Unless specifically marked, which of the following is the maximum overload protection rating of No. 16 AWG copper conductor?

15 A
7 A
20 A
10 A

NEC Reference: NEC 240.4(D)

Question 9: Which of the following is the maximum ampacity of a No 8 THWN copper conductor at temperature 75 <sup>0</sup> C?

40 A
50 A
55 A
65 A

NEC Reference: NEC Table 310.16

Question 10: How many transformer are needed for open - delta connection?

Question 11: In a dwelling unit, GFCI protection is required for all 125-volt, 15- and 20-ampere receptacles located in a _____.

Bedroom
Bathroom
Living room
Hallway

NEC Reference: NEC 210.8(A)

Question 12: In a dwelling unit, receptacle outlets along wall space must be placed so that no point measured horizontally along the wall is more than _____ feet from a receptacle outlet.

4 feet
6 feet
8 feet
12 feet

NEC Reference: NEC 210.52(A)

Question 13: Two resistors, each rated at 10 ohms, are connected in parallel. What is the total resistance of the circuit?

20 ohms
10 ohms
5 ohms
2.5 ohms

Question 14: Per NEC 300.14, conductors at a box or fitting must have a free length of at least _____ inches, measured from where the conductor enters the enclosure.

3 inches
4 inches
6 inches
12 inches

NEC Reference: NEC 300.14

Question 15: Per NEC 430.22(A), the branch circuit conductor supplying a single continuous-duty motor must have an ampacity of not less than _____ percent of the motor full-load current (FLC).

100%
115%
125%
150%

NEC Reference: NEC 430.22(A)

Question 16: Per NEC Table 430.52, the maximum rating for an inverse time (standard) circuit breaker protecting a motor branch circuit is _____ percent of the motor full-load current.

150%
175%
200%
250%

NEC Reference: NEC Table 430.52

Question 17: Which of the following is NOT a standard ampere rating for overcurrent devices (fuses or circuit breakers) listed in NEC 240.6(A)?

50 amperes
60 amperes
65 amperes
70 amperes

NEC Reference: NEC 240.6(A)

Question 18: Per NEC 110.14(C)(1), equipment rated 100 amperes or less must use conductors and terminations rated at a minimum of _____ °C.

90°C
75°C
60°C
45°C

NEC Reference: NEC 110.14(C)(1)

Question 19: A single-phase 120-volt circuit draws 10 amperes and the load consumes 960 watts of true power. What is the power factor of this load?

0.96
0.80
0.75
1.0

Question 20: What is the minimum ampere rating required for the service disconnecting means of a single-family dwelling, per NEC 230.79(C)?

60 amperes
100 amperes
150 amperes
200 amperes

NEC Reference: NEC 230.79(C)

Question 21: A copper conductor has a resistance of 0.5 ohms and carries a current of 20 amperes. What is the voltage drop across this conductor?

0.025 volts
5 volts
10 volts
40 volts

Question 22: Which of the following is a permitted method of identifying an equipment grounding conductor (EGC) per NEC 250.119?

Red insulation
Green insulation
Blue insulation
Orange insulation

NEC Reference: NEC 250.119

Question 23: A recessed can light that is NOT listed for insulation contact (non-IC-rated) must be kept at least _____ inches away from thermal insulation.

1 inch
2 inches
3 inches
6 inches

NEC Reference: NEC 410.116(B)

Question 24: A balanced three-phase load is connected to a 208-volt (line-to-line) system and draws 10 amperes per line. What is the total apparent power?

2,080 volt-amperes
2,400 volt-amperes
3,600 volt-amperes
6,240 volt-amperes

Question 25: Per NEC Table 314.16(B), how much volume must be counted for each No. 12 AWG conductor in a box fill calculation?

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

NEC Reference: NEC Table 314.16(B)

Question 26: Per NEC 200.6(A), a grounded conductor (neutral) of size 6 AWG or smaller must be identified by _____ insulation.

Green or bare
White or gray
Red
Black

NEC Reference: NEC 200.6(A)

Question 27: Per NEC Table 300.5, what is the minimum burial depth required for rigid metal conduit (RMC) in a general location (not under a street or building)?

6 inches
12 inches
18 inches
24 inches

NEC Reference: NEC Table 300.5

Question 28: Per NEC 230.9(A), service conductors run as open (exposed) wires must maintain a clearance of at least _____ feet from windows that can be opened.

1 foot
2 feet
3 feet
6 feet

NEC Reference: NEC 230.9(A)

Question 29: In a purely capacitive AC circuit, the current _____ the voltage by 90 degrees.

Lags
Is in phase with
Leads
Is 180 degrees opposite to

Question 30: A panelboard has a 200-ampere bus rating. Per NEC 408.36, the supply-side overcurrent protective device for this panelboard must be rated at no more than _____.

125 amperes
150 amperes
200 amperes
250 amperes

NEC Reference: NEC 408.36

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.

Journeyman Electrician Practice Test 31

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Journeyman Electrician Practice Test 31 — Question List

Question 1: What is the calculated load on a branch circuit for 10, 15-ampere receptacles in a retail store?

Question 2: How many 20 Amp circuits are required for a 2500 sq.ft dwelling unit?

Question 3: What is the best used conductor to carry current in electric circuit unless it is specified?

Question 4: The dis-connector switch rating for motor loads is kept lower than motor branch conductor to permit the motor to start.

Question 5: Which of the following electrical parameter remains unchanged in a series electrical circuit?

Question 6: An LED light of 200W is supplied by a 120 volts electrical supply. what is the resistance ?

Question 7: The load on a cord-and-plug-connected receptacle shall not exceed _____ percent of the receptacle rating.

Question 8: Unless specifically marked, which of the following is the maximum overload protection rating of No. 16 AWG copper conductor?

Question 9: Which of the following is the maximum ampacity of a No 8 THWN copper conductor at temperature 75 <sup>0</sup> C?

Question 10: How many transformer are needed for open - delta connection?

Question 11: In a dwelling unit, GFCI protection is required for all 125-volt, 15- and 20-ampere receptacles located in a _____.

Question 12: In a dwelling unit, receptacle outlets along wall space must be placed so that no point measured horizontally along the wall is more than _____ feet from a receptacle outlet.

Question 13: Two resistors, each rated at 10 ohms, are connected in parallel. What is the total resistance of the circuit?

Question 14: Per NEC 300.14, conductors at a box or fitting must have a free length of at least _____ inches, measured from where the conductor enters the enclosure.

Question 15: Per NEC 430.22(A), the branch circuit conductor supplying a single continuous-duty motor must have an ampacity of not less than _____ percent of the motor full-load current (FLC).

Question 16: Per NEC Table 430.52, the maximum rating for an inverse time (standard) circuit breaker protecting a motor branch circuit is _____ percent of the motor full-load current.

Question 17: Which of the following is NOT a standard ampere rating for overcurrent devices (fuses or circuit breakers) listed in NEC 240.6(A)?

Question 18: Per NEC 110.14(C)(1), equipment rated 100 amperes or less must use conductors and terminations rated at a minimum of _____ °C.

Question 19: A single-phase 120-volt circuit draws 10 amperes and the load consumes 960 watts of true power. What is the power factor of this load?

Question 20: What is the minimum ampere rating required for the service disconnecting means of a single-family dwelling, per NEC 230.79(C)?

Question 21: A copper conductor has a resistance of 0.5 ohms and carries a current of 20 amperes. What is the voltage drop across this conductor?

Question 22: Which of the following is a permitted method of identifying an equipment grounding conductor (EGC) per NEC 250.119?

Question 23: A recessed can light that is NOT listed for insulation contact (non-IC-rated) must be kept at least _____ inches away from thermal insulation.

Question 24: A balanced three-phase load is connected to a 208-volt (line-to-line) system and draws 10 amperes per line. What is the total apparent power?

Question 25: Per NEC Table 314.16(B), how much volume must be counted for each No. 12 AWG conductor in a box fill calculation?

Question 26: Per NEC 200.6(A), a grounded conductor (neutral) of size 6 AWG or smaller must be identified by _____ insulation.

Question 27: Per NEC Table 300.5, what is the minimum burial depth required for rigid metal conduit (RMC) in a general location (not under a street or building)?

Question 28: Per NEC 230.9(A), service conductors run as open (exposed) wires must maintain a clearance of at least _____ feet from windows that can be opened.

Question 29: In a purely capacitive AC circuit, the current _____ the voltage by 90 degrees.

Question 30: A panelboard has a 200-ampere bus rating. Per NEC 408.36, the supply-side overcurrent protective device for this panelboard must be rated at no more than _____.

Key NEC References for This Test

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