Next Journeyman Electrician Practice Test 2

JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 1

This is Journeyman Electrician Practice Test 1 — the first of our free NEC-based practice exams to help you pass your journeyman electrician licensing exam. The test has 30 multiple-choice questions covering electrical theory, motor wiring, conductor sizing, grounding, and NEC code rules. You need a score of 70% or higher to pass. Every question comes with a full explanation so you learn from any mistakes and know exactly which NEC section to study.

TOPICS COVERED

journeyman electrician

How this test works

Read each question carefully

Look for absolute words like always / never — they often distinguish the right answer.

Manage your time

You have 45 min for 30 questions. Skip tough ones and come back.

Progress is auto-saved

Your answers are saved locally — a page refresh won't lose your work.

Review your answers

After submitting you'll see every explanation and your NEC references.

Frequently Asked Questions

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.

Before You Start

30 questions — multiple choice
45 minutes to finish (timer starts when you begin)
Pass score is 70% — you need at least 21 correct answers
Full explanation shown for every question after you submit

Topics in This Test

Ohm's Law and basic electrical calculations (voltage, current, resistance)
Motor disconnecting means — how to size them correctly (115% rule)
Conductor sizing for motors and transformers
Panelboard overcurrent protection rules (NEC 408.36)
GFCI requirements in bathrooms (NEC 210.8)
Grounding electrodes — allowed and not allowed materials (NEC 250.52)
Overhead conductor minimum sizes for outside branch circuits (NEC 225.6)
Metal wireway fill and support spacing (NEC 376)
Voltage drop calculations — NEC 5% rule
Equipment grounding conductor sizing (NEC 250.122)

Tip: If you are unsure about a question, make your best guess and keep moving. Go back and review the explanations after you finish — that is where the real learning happens.

Questions

45 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

Student Reviews 5.0 / 5 · 1 review

Marcus T.

Passed my journeyman exam last Tuesday and honestly these tests played a big part in it. The wording on the questions is very similiar to what I saw on the actual exam. Definitly worth doing all of them before your test date.

Journeyman Electrician Practice Test 1 — Question List

Question 1: What is the low voltage contact limit for sinusoidal AC?

15 Volts RMS
18 Volts RMS
16 Volts RMS
10 Volts RMS

Question 2: When an electrical circuit tested with ohmmeter, a short circuit is indicated by a reading of ......................

100 ohm
Zero
infinity
half of the voltage in circuit

Question 3: The following materials shall not be used as Grounding electrodes.

Copper
Metal
Aluminum

NEC Reference: NEC 250.52

Question 4: Flexible cords may not be used in the following locations ..........

wiring of luminaires
cranes
Elevator cables
To replace a fixed wiring of a structure

NEC Reference: NEC 400.7

Question 5: In a metal wire-ways, the distance between supports shall not exceed .............. ft.

NEC Reference: NEC 376.30(A)

Question 6: Underground wiring shall be installed in which of the following conduit

Threaded rigid metal
Threaded steel intermediate metal
PVC
All options are correct

NEC Reference: NEC 515.8

Question 7: For stationary small motors rated less than .................., the branch circuit over current device may serve as a controller.

1/2 horsepower
1/ 8 horse power
1 horsepower
5 horse power

NEC Reference: NEC 430.81

Question 8: If the panel board rating is 100 amperes, what shall be the over current device rating located in panel board?

125 amperes
100 amperes
less than 100 amperes
greater than 100 amperes

NEC Reference: NEC 408.36

Question 9: When branch circuits used at outside, the size of overhead conductors for 600 volts or less, for spans upto 50 feet, shall not be less than ............. copper.

NO 18
NO 12
NO 10
NO 8

NEC Reference: NEC 225.6(A)(1)

Question 10: All 15,20 amperes receptacle outlets installed in bathrooms of dwelling units shall always require ...........................................

water proof receptacles
protective guards
Ground fault circuit interceptor
over current protection device

NEC Reference: NEC 210.8(A)(1)

Question 11: When the single phase air conditioner rating is less than .......... at 240 volts can be considered as single motor unit in determining branch circuit conditions.

30 amperes
40 amperes
50 amperes
60 amperes

NEC Reference: NEC 440.62(A)

Question 12: What is the demand factor applied in calculating feeder or service conductor load for a commercial kitchen having four electrical equipment

100 %
90 %
80 %
75 %

NEC Reference: NEC 220.56

Question 13: What is the minimum size secondary conductor required for a 2 wire 480 volts/ 120 volts transformer rated at 2.3 KVA with 75<sup>0</sup>C temperature at terminals?

14 AWG
12 AWG
10 AWG
8 AWG

NEC Reference: NEC Table 310.15(B)(16)

Question 14: What is the resistance of the conductor if the conductor voltage drop is 3.6 volts and current flowing through conductor is 18 amperes?

0.2 ohms
2 ohms
0.5 ohms
5 ohms

Question 15: What is the resistance of 80 watt Light bulb rated at 120 volts?

180 ohms
1.5 ohms
54 ohms
120 ohms

Question 16: If two 4 ohm resistors are connected in series which are powered by 240 volts power source, what is the current flow across one 4 ohm resistor?

30 amperes
15 amperes
120 amperes
60 amperes

Question 17: If a 230 volts load is connected to 240 volts power source, what is the minimum voltage that can be supplied to load as recommended by NEC?

228 volts
240 volts
230 volts
235 volts

Question 18: A 440 volts motor has a full load current of 34 amperes. what size disconnecting means is required?

45 amperes
34 amperes
50 amperes
40 amperes

NEC Reference: NEC 440.12(A)(1)

Question 19: For a 300 ampere electrical circuit, what is the minimum size copper equipment grounding conductor as per NEC?

6 AWG
4 AWG
8 AWG
10 AWG

NEC Reference: NEC 250.122

Question 20: What is the minimum size of THWN conductors required for single phase 10 HP motor connected to 240 volts supply?

4 AWG THWN Copper
6 AWG THWN Copper
8 AWG THWN Copper
10 AWG THWN Copper

NEC Reference: NEC 430.248

Question 21: A switch controlling a light or load must always be placed in which conductor?

The grounded (neutral) conductor
The ungrounded (hot) conductor
The equipment grounding conductor
Either the hot or neutral conductor

NEC Reference: NEC 404.2(A)

Question 22: A motor branch circuit conductor must have an ampacity of not less than what percentage of the motor full-load current?

100%
115%
125%
150%

NEC Reference: NEC 430.22

Question 23: In a parallel circuit, what is the relationship between total current and the individual branch currents?

Total current equals the largest branch current
Total current equals the sum of all branch currents
Total current is always zero
Total current is less than the smallest branch current

Question 24: What is the minimum burial depth for a direct burial cable installed under a general outdoor area?

6 inches
12 inches
18 inches
24 inches

NEC Reference: NEC Table 300.5

Question 25: What is the main difference between a fuse and a circuit breaker when they open under a fault?

There is no difference — both must be replaced
A fuse must be replaced; a circuit breaker can be reset
A circuit breaker must be replaced; a fuse can be reset
Both can be reset without any replacement

Question 26: When an induction motor first starts, the starting current is approximately how many times the full-load running current?

1 to 2 times
2 to 3 times
6 times
10 times

Question 27: Service entrance conductors must have an ampacity of not less than .............

125% of the connected load
The load to be served
The rating of the main breaker only
80% of the connected load

NEC Reference: NEC 230.42(A)

Question 28: Which wire color identifies the grounded (neutral) conductor in a branch circuit?

Black
Red
White or gray
Green

NEC Reference: NEC 200.6(A)

Question 29: A ground fault circuit interrupter (GFCI) trips when it detects a current imbalance between the hot and neutral conductors of approximately how many milliamperes?

50 milliamperes
20 milliamperes
5 milliamperes
100 milliamperes

Question 30: When replacing an old 2-wire (ungrounded) receptacle, what does NEC 406.4(D)(2) permit as an acceptable replacement?

Only another 2-wire ungrounded receptacle
A GFCI receptacle labeled "No Equipment Ground"
A 3-wire receptacle connected to any available ground
No replacement is permitted until a ground wire is added

NEC Reference: NEC 406.4(D)(2)

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.