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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 24

Free practice test 24 for the journeyman electrician exam. Covers general lighting load calculations, minimum branch circuits for floor area, box fill for octagonal and square boxes, conduit bend limits, voltage drop, conductor ampacity, and parallel resistance.

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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.

This test covers NEC load calculations and box fill rules. Key formulas: General lighting load = floor area × VA/sqft from NEC Table 220.12 (dwellings = 3 VA/sqft, hospitals = 2 VA/sqft, offices = 3.5 VA/sqft). Number of branch circuits = total load VA ÷ (circuit volts × circuit amperes). For box fill, NEC Table 314.16(A) gives box volumes — a 4" round × 1-1/2" box = 15.5 cubic inches. EMT and FMC are both limited to a maximum of 360° total bends between pull points (NEC 358.36 and 348.26).

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Journeyman Electrician Practice Test 24 — Question List

Question 1: What is the general lighting unit load for a 6000 square foot hospital?

12000 Volt-Ampere
6000 Volt-Ampere
18000 Volt-Ampere
3000 Volt-Ampere

NEC Reference: NEC 220.12

Question 2: The calculated lighting load with corresponding demand factors shall not be applied to determine number branch circuits required for wiring.

True
False

NEC Reference: NEC 220.42

Question 3: Dwelling unit has a floor area of 2000 sq ft, what are the minimum number of branch circuits required for lighting load at 115 volt ?

Four 15 amp 2-wire circuit
Four 20 amp 2-wire circuit
three 15 amp 2-wire
Two 20 amp 2-wire circuit

NEC Reference: NEC 220.12

Question 4: What is the minimum volume of a 4-inch round or octagonal metal box with a depth of 1 1/2 inches?

12.5 inches 3
15.5 inches 3
21.5 inches 3
18.5 inches 3

NEC Reference: NEC Table 314.16(A)

Question 5: The conductors shall be protected from abrasion at both entry and exit points of a boxes, conduit bodies and fittings.

True
False

NEC Reference: NEC 314.17

Question 6: Which of the total maximum bend that an EMT conduit can be bend?

60 degrees
90 degrees
180 degrees
360 degrees

NEC Reference: NEC 358.36

Question 7: The electrical wire has a resistance of 1.5 ohms has a current flow of 4 amp. If supply end of the electrical wire indicates 120 volts what will the voltmeter reading of at the end of the wire?

114 volts
120 volts
118.5 volts
115 volts

Question 8: Airfield lighting cable used in electrical circuit rated over 5000 volts and powered by electrical regulator shall be permitted to be non-shielded.

True
False

Question 9: A 120/240 single family dwelling unit has a calculated demand load of 120 amperes, what is the minimum type of THW copper conductor size allowed?

2 AWG
1/0 AWG
2/0 AWG
1 AWG

NEC Reference: NEC 310.15(B)

Question 10: What is the equivalent resistance offered by parallel connection of two resistors each having 2 ohms of resistance?

1 ohm
2 ohm
4 ohm
0.5 ohm

Question 11: What is the general lighting unit load for a warehouse building per NEC Table 220.12?

1 VA per square foot
0.25 VA per square foot
2 VA per square foot
3 VA per square foot

NEC Reference: NEC Table 220.12

Question 12: For a hotel or motel, NEC Table 220.42 applies a demand factor. What is the demand factor for the first 20,000 VA of lighting load in a hotel?

100%
50%
35%
25%

NEC Reference: NEC Table 220.42

Question 13: For box fill calculations, a luminaire stud (fixture stud) or hickey inside a box counts as how many conductors?

Zero — fixture hardware is not counted
One conductor
Two conductors
Three conductors

NEC Reference: NEC 314.16(B)(3)

Question 14: Flexible Metal Conduit (FMC) shall not have more than ............. of bends between two pull points.

180 degrees
360 degrees
90 degrees
270 degrees

NEC Reference: NEC 348.26

Question 15: A feeder conductor has a resistance of 0.5 ohms and carries 20 amperes. If the source is 240V, what is the voltage at the load?

240 volts
230 volts
250 volts
220 volts

Question 16: Per NEC Table 310.12, what is the ampacity of No. 2 AWG copper conductor with THW insulation at 75°C?

70 amperes
95 amperes
110 amperes
115 amperes

NEC Reference: NEC Table 310.12

Question 17: The grounded (neutral) conductor of a 120/240V single-phase service may be reduced in size below the ungrounded conductors when .............

Never — the neutral must always equal the hot conductors
The unbalanced load calculation permits a smaller neutral
Only if the service is 100A or less
Always — neutrals are always smaller than hot conductors

NEC Reference: NEC 220.61

Question 18: A dwelling unit has 4000 square feet of floor area. At 120 volts, how many 15-ampere branch circuits are required for the general lighting load?

5 circuits
7 circuits
4 circuits
10 circuits

NEC Reference: NEC 210.11(A)

Question 19: A concrete-encased grounding electrode (Ufer ground) must consist of at least ............. of steel rebar or No. 4 AWG or larger copper conductor embedded in the concrete footing.

10 feet
20 feet
8 feet
25 feet

NEC Reference: NEC 250.52(A)(3)

Question 20: A ground ring used as a grounding electrode must encircle the building and be buried at least ............. below grade.

12 inches
30 inches
18 inches
8 feet

NEC Reference: NEC 250.52(A)(4)

Question 21: In a dwelling unit, Arc-Fault Circuit Interrupter (AFCI) protection is required for branch circuits supplying which locations?

Garages and outdoor areas only
All habitable rooms and similar areas in dwelling units
Only the master bedroom
Only kitchens and bathrooms

NEC Reference: NEC 210.12(A)

Question 22: How many outdoor receptacle outlets are required at a one-family or two-family dwelling unit?

One at the front only
At least one at the front and one at the back (accessible at grade)
No outdoor receptacles are required by the NEC
One at each corner of the house

NEC Reference: NEC 210.52(E)

Question 23: What is the maximum number of service disconnecting means (service disconnects) permitted per service?

One
Six
Four
Eight

NEC Reference: NEC 230.71(A)

Question 24: A transformer has 500 turns on the primary and 100 turns on the secondary. If the primary voltage is 480V, what is the secondary voltage?

480 volts
96 volts
2400 volts
120 volts

Question 25: If the supply frequency of an AC circuit increases, the inductive reactance (XL) of an inductor will .............

Decrease
Increase
Remain the same
Become zero

Question 26: If the supply frequency of an AC circuit increases, the capacitive reactance (XC) of a capacitor will .............

Increase
Decrease
Remain the same
Become infinite

Question 27: In a series AC circuit, total impedance (Z) is calculated as .............

Z = R + XL + XC
Z = √(R² + (XL − XC)²)
Z = R × XL × XC
Z = R only

Question 28: Per NEC Article 100, a "continuous load" is one where the maximum current is expected to continue for .............

1 hour or more
3 hours or more
8 hours or more
30 minutes or more

NEC Reference: NEC Article 100

Question 29: Per NEC Article 100, a "feeder" consists of all circuit conductors between .............

The meter and the main breaker
The service equipment and the final branch circuit overcurrent device
The final branch circuit overcurrent device and the outlet
The utility transformer and the meter

NEC Reference: NEC Article 100

Question 30: What is the purpose of the main bonding jumper (MBJ) in a service panel?

To reduce voltage drop in the neutral conductor
To connect the neutral to the equipment ground and cabinet at the service entrance, creating a fault return path
To separate the neutral from ground at all panels
To provide a second path for normal load current

NEC Reference: NEC 250.28

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 24

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Key NEC References for This Test

Journeyman Electrician Practice Test 24

How this test works

Frequently Asked Questions

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Journeyman Electrician Practice Test 24 — Question List

Question 1: What is the general lighting unit load for a 6000 square foot hospital?

Question 2: The calculated lighting load with corresponding demand factors shall not be applied to determine number branch circuits required for wiring.

Question 3: Dwelling unit has a floor area of 2000 sq ft, what are the minimum number of branch circuits required for lighting load at 115 volt ?

Question 4: What is the minimum volume of a 4-inch round or octagonal metal box with a depth of 1 1/2 inches?

Question 5: The conductors shall be protected from abrasion at both entry and exit points of a boxes, conduit bodies and fittings.

Question 6: Which of the total maximum bend that an EMT conduit can be bend?

Question 7: The electrical wire has a resistance of 1.5 ohms has a current flow of 4 amp. If supply end of the electrical wire indicates 120 volts what will the voltmeter reading of at the end of the wire?

Question 8: Airfield lighting cable used in electrical circuit rated over 5000 volts and powered by electrical regulator shall be permitted to be non-shielded.

Question 9: A 120/240 single family dwelling unit has a calculated demand load of 120 amperes, what is the minimum type of THW copper conductor size allowed?

Question 10: What is the equivalent resistance offered by parallel connection of two resistors each having 2 ohms of resistance?

Question 11: What is the general lighting unit load for a warehouse building per NEC Table 220.12?

Question 12: For a hotel or motel, NEC Table 220.42 applies a demand factor. What is the demand factor for the first 20,000 VA of lighting load in a hotel?

Question 13: For box fill calculations, a luminaire stud (fixture stud) or hickey inside a box counts as how many conductors?

Question 14: Flexible Metal Conduit (FMC) shall not have more than ............. of bends between two pull points.

Question 15: A feeder conductor has a resistance of 0.5 ohms and carries 20 amperes. If the source is 240V, what is the voltage at the load?

Question 16: Per NEC Table 310.12, what is the ampacity of No. 2 AWG copper conductor with THW insulation at 75°C?

Question 17: The grounded (neutral) conductor of a 120/240V single-phase service may be reduced in size below the ungrounded conductors when .............

Question 18: A dwelling unit has 4000 square feet of floor area. At 120 volts, how many 15-ampere branch circuits are required for the general lighting load?

Question 19: A concrete-encased grounding electrode (Ufer ground) must consist of at least ............. of steel rebar or No. 4 AWG or larger copper conductor embedded in the concrete footing.

Question 20: A ground ring used as a grounding electrode must encircle the building and be buried at least ............. below grade.

Question 21: In a dwelling unit, Arc-Fault Circuit Interrupter (AFCI) protection is required for branch circuits supplying which locations?

Question 22: How many outdoor receptacle outlets are required at a one-family or two-family dwelling unit?

Question 23: What is the maximum number of service disconnecting means (service disconnects) permitted per service?

Question 24: A transformer has 500 turns on the primary and 100 turns on the secondary. If the primary voltage is 480V, what is the secondary voltage?

Question 25: If the supply frequency of an AC circuit increases, the inductive reactance (XL) of an inductor will .............

Question 26: If the supply frequency of an AC circuit increases, the capacitive reactance (XC) of a capacitor will .............

Question 27: In a series AC circuit, total impedance (Z) is calculated as .............

Question 28: Per NEC Article 100, a "continuous load" is one where the maximum current is expected to continue for .............

Question 29: Per NEC Article 100, a "feeder" consists of all circuit conductors between .............

Question 30: What is the purpose of the main bonding jumper (MBJ) in a service panel?

Key NEC References for This Test

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