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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 36

Free Online Journeyman Electrician Exam Practice Test — 36This free 30-question practice test covers journeyman electrician exam topics based on the 2023 NEC, including emergency battery systems (NEC 700), panelboard installation requirements, low-voltage lighting systems, motor efficiency calculations, service drop clearances, lighting track conductors, conductor derating, receptacle load calculations, equipment interrupting ratings, service disconnects, equipment grounding conductor sizing, conduit burial depths, and power factor correction.

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

Key rules to review: Emergency batteries must hold at least 87.5% of voltage for 1.5 hours (NEC 700.12(A)). Every panelboard must be mounted in a cabinet (NEC 408.4(A)). Low-voltage lighting operates at 30V or less (NEC 411.2). Service drops over truck traffic areas must clear 18 feet (NEC 230.24(B)(1)). No derating for 3 or fewer current-carrying conductors in conduit (NEC 310.15(C)(1)). Lighting track branch circuits are limited to 20A, so minimum wire = #12 AWG (NEC 410.151(C)(1)). Receptacle load = 180 VA each for calculations (NEC 220.14(I)).

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Journeyman Electrician Practice Test 36 — Question List

Question 1: Storage batteries used for an emergency system must carry the total load for 1½ hours without the voltage at the load falling below what percentage of normal?

80%
82.5%
85%
87.5%

NEC Reference: NEC 700.12(C)(4)

Question 2: How must a panelboard be enclosed?

In an enclosure built for it, dead-front
Only in a locked room
It may be open on a wall
In any metal box

NEC Reference: NEC 408.38

Question 3: Article 411 covers lighting systems operating at not more than what AC voltage?

25 V
30 V
40 V
50 V

NEC Reference: NEC 411.1

Question 4: What is overall efficiency of a 4 hp motor that draws 15 amperes at 240 volts?

90 %
83 %
75 %
81 %

Question 5: What is the minimum clearance of overhead service conductors over public streets, alleys, roads and parking areas subject to truck traffic?

10 ft
12 ft
15 ft
18 ft

NEC Reference: NEC 230.24(B)(4)

Question 6: Which of the following instrument is used to measure the current flow in the circuit?

Ammeter
Voltmeter
Ohm meter
Watt Meter

Question 7: What is the minimum size of the conductors inside a lighting track?

16 AWG
14 AWG
12 AWG
10 AWG

NEC Reference: NEC 410.155(A)

Question 8: What is the maximum number of current-carrying conductors that may be in a raceway before ampacity adjustment factors apply?

NEC Reference: NEC 310.15(C)(1) and 310.15(E)

Question 9: Which of the following is the measurement unit of circuit resistance?

ohm
mho
farad
henry

Question 10: Which of the following is the maximum number of receptacles that can be on a 20 ampere branch circuit operated at 120 volts?

NEC Reference: NEC 220.14(I)

Question 11: Which wiring methods may be used under the NEC?

Only methods the Code recognizes
Only methods listed by the utility
Any method the owner approves
Any method the installer prefers

NEC Reference: NEC 110.8

Question 12: A service disconnect is operated by a remote control device. Where must the service disconnect itself be located?

At the remote control location
On the roof of the building
Anywhere, since it is remotely operated
Outside, or inside nearest the entrance

NEC Reference: NEC 230.70(A)(3)

Question 13: A 15 A circuit uses 14 AWG conductors fed from a 60 A tap (permitted by a specific rule). Table 250.122 would call for a 10 AWG EGC. What size EGC is required?

6 AWG copper
10 AWG, from Table 250.122
8 AWG copper
No larger than the 14 AWG conductors

NEC Reference: NEC 250.122(A)

Question 14: What is the minimum cover for rigid metal conduit (RMC) under a one-family dwelling driveway?

24 in.
18 in.
12 in.
6 in.

NEC Reference: NEC Table 300.5

Question 15: A 2-gang device (wider than a single 2 in. device box) is mounted in a box. How is it counted for box fill?

A double volume per gang
As one volume in total
It is not counted at all
As two volumes in total

NEC Reference: NEC 314.16(B)(4)

Question 16: A switchboard or panelboard is supplied by an ungrounded AC system. What field marking is required?

HIGH LEG — ORANGE
CAUTION — UNGROUNDED SYSTEM OPERATING
No marking is required
DANGER — 480 V

NEC Reference: NEC 408.3(F)(2)

Question 17: Per NEC 440.12(A)(1), the disconnecting means for air conditioning or refrigeration equipment shall be rated at not less than _____ percent of the nameplate rated-load current of the motor-compressor.

100%
115%
125%
175%

NEC Reference: NEC 440.12(A)(1)

Question 18: Per NEC 430.7(A), which of the following information is required to appear on a motor nameplate?

Color of the motor housing
Rated horsepower, rated voltage, and rated full-load amperes
The serial number of the motor only
The motor's purchase price and date of manufacture

NEC Reference: NEC 430.7(A)

Question 19: A 20-ampere branch circuit supplies several general-purpose receptacles for cord-and-plug-connected loads. What minimum conductor ampacity is required?

At least the 20 A circuit rating
The calculated load only
25 A, the 75 °C value
16 A, 80% of the circuit

NEC Reference: NEC 210.19

Question 20: In an AC circuit containing an inductor (such as a motor or transformer coil), the inductive reactance (XL) will _____ if the frequency of the supply voltage is increased.

Decrease
Increase
Stay the same
Drop to zero

Question 21: A dwelling has a front door, a back door at grade, and an attached garage with an overhead vehicle door. How many outdoor entrance lighting outlets are required?

NEC Reference: NEC 210.70(A)(2)(2)

Question 22: A ventilated transformer is installed tight against a wall that blocks its ventilating openings. Which rule is violated?

110.26(B) working space
250.4 grounding
No rule; this is permitted
110.13(B) free air circulation

NEC Reference: NEC 110.13(B)

Question 23: Per NEC 210.8(B)(1), in other than dwelling units (such as office buildings, restaurants, and retail stores), GFCI protection is required for all 125-volt through 250-volt receptacles installed in _____ .

All receptacles throughout the building
Bathrooms
Only in laundry rooms
Outlets within 6 feet of a water heater

NEC Reference: NEC 210.8(B)(1)

Question 24: Per NEC Article 725, which of the following is a common example of a Class 2 remote control and signaling circuit?

A 240-volt electric dryer circuit
Thermostat wiring for a residential heating/cooling system
A 20-ampere kitchen small appliance circuit
The service entrance feeder conductors

NEC Reference: NEC 725.2

Question 25: Which rules apply to every disconnecting means in a motor circuit, between the feeder tap and the motor?

None; only the first one must comply
Only the controller rules
Each must meet 430.109 and 430.110
Only the 430.102 location rules

NEC Reference: NEC 430.108

Question 26: PVC conduit must be secured within what distance of each outlet box, junction box or other termination?

1 ft
2 ft
3 ft
5 ft

NEC Reference: NEC 352.30(A) and Table 352.30

Question 27: An over-excited synchronous motor running with no mechanical load (a synchronous condenser) is used to:

Convert AC to DC
Raise the system power factor
Increase the motor's speed
Reduce the supply voltage

Question 28: How must entrances to rooms containing exposed live parts be marked?

Warning signs barring unqualified persons
Only the panel schedule
A red indicating light
They need no marking at all

NEC Reference: NEC 110.27(C)

Question 29: Which type of luminaire is NOT permitted in a dwelling clothes closet?

Surface-mounted LED luminaire with an enclosed light source
Surface-mounted fluorescent luminaire
Pendant luminaire
Recessed fluorescent luminaire

NEC Reference: NEC 410.16(B)

Question 30: A countertop receptacle is placed inside an appliance garage (a cabinet that encloses a countertop appliance). Does it count as one of the required countertop receptacles?

Only if it is GFCI protected
Yes, always
Only if within 20 in. of the counter
No; it is not readily accessible

NEC Reference: NEC 210.52(C)

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 36

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Journeyman Electrician Practice Test 36 — Question List

Question 1: Storage batteries used for an emergency system must carry the total load for 1½ hours without the voltage at the load falling below what percentage of normal?

Question 2: How must a panelboard be enclosed?

Question 3: Article 411 covers lighting systems operating at not more than what AC voltage?

Question 4: What is overall efficiency of a 4 hp motor that draws 15 amperes at 240 volts?

Question 5: What is the minimum clearance of overhead service conductors over public streets, alleys, roads and parking areas subject to truck traffic?

Question 6: Which of the following instrument is used to measure the current flow in the circuit?

Question 7: What is the minimum size of the conductors inside a lighting track?

Question 8: What is the maximum number of current-carrying conductors that may be in a raceway before ampacity adjustment factors apply?

Question 9: Which of the following is the measurement unit of circuit resistance?

Question 10: Which of the following is the maximum number of receptacles that can be on a 20 ampere branch circuit operated at 120 volts?

Question 11: Which wiring methods may be used under the NEC?

Question 12: A service disconnect is operated by a remote control device. Where must the service disconnect itself be located?

Question 13: A 15 A circuit uses 14 AWG conductors fed from a 60 A tap (permitted by a specific rule). Table 250.122 would call for a 10 AWG EGC. What size EGC is required?

Question 14: What is the minimum cover for rigid metal conduit (RMC) under a one-family dwelling driveway?

Question 15: A 2-gang device (wider than a single 2 in. device box) is mounted in a box. How is it counted for box fill?

Question 16: A switchboard or panelboard is supplied by an ungrounded AC system. What field marking is required?

Question 17: Per NEC 440.12(A)(1), the disconnecting means for air conditioning or refrigeration equipment shall be rated at not less than _____ percent of the nameplate rated-load current of the motor-compressor.

Question 18: Per NEC 430.7(A), which of the following information is required to appear on a motor nameplate?

Question 19: A 20-ampere branch circuit supplies several general-purpose receptacles for cord-and-plug-connected loads. What minimum conductor ampacity is required?

Question 20: In an AC circuit containing an inductor (such as a motor or transformer coil), the inductive reactance (XL) will _____ if the frequency of the supply voltage is increased.

Question 21: A dwelling has a front door, a back door at grade, and an attached garage with an overhead vehicle door. How many outdoor entrance lighting outlets are required?

Question 22: A ventilated transformer is installed tight against a wall that blocks its ventilating openings. Which rule is violated?

Question 23: Per NEC 210.8(B)(1), in other than dwelling units (such as office buildings, restaurants, and retail stores), GFCI protection is required for all 125-volt through 250-volt receptacles installed in _____ .

Question 24: Per NEC Article 725, which of the following is a common example of a Class 2 remote control and signaling circuit?

Question 25: Which rules apply to every disconnecting means in a motor circuit, between the feeder tap and the motor?

Question 26: PVC conduit must be secured within what distance of each outlet box, junction box or other termination?

Question 27: An over-excited synchronous motor running with no mechanical load (a synchronous condenser) is used to:

Question 28: How must entrances to rooms containing exposed live parts be marked?

Question 29: Which type of luminaire is NOT permitted in a dwelling clothes closet?

Question 30: A countertop receptacle is placed inside an appliance garage (a cabinet that encloses a countertop appliance). Does it count as one of the required countertop receptacles?

Key NEC References for This Test

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