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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 8

This is Journeyman Electrician Practice Test 8. It is a free practice test with 30 questions to help you get ready for your journeyman electrician licensing exam. The questions cover hazardous location seals, lamp holders, grounding systems, cabinets, feeder voltage drop, conductor sizing, motor protection, and overhead service rules. You need 70% or higher to pass. Every question shows a full explanation with NEC reference after you submit.

How this test works

Read each question carefully

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

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

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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
Pass score is 70% — you need 21 or more correct
Full explanation with NEC reference shown after you submit

What This Test Covers

Hazardous location seal fill limit (NEC 501.15)
Low voltage circuit lamp holder rating (NEC 720.5)
Outline lighting clearance above vehicles (NEC 600.9)
Solidly grounded system definition (NEC 100)
Cabinet airspace requirements (NEC 312.11)
Feeder voltage drop recommendation (NEC 215.2)
Conductor sizing for 35A circuit (NEC 110.14)
Motor overload fuse placement (NEC 430.36)
Overhead service clearance above roof (NEC 230.24)
Minimum 3-wire service for small residence (NEC 230.79)
Service entrance minimum conductor size (NEC 230.31)
Multiple motor fuse sizing (NEC 430.52)
Open circuit indication
Transformer theory: step-up transformers
Inductive and capacitive loads in AC circuits
Class III hazardous location definition (NEC 503)
Swimming pool receptacle location (NEC 680.22)
Multiple motor feeder sizing (NEC 430.17)

Tip: Pay attention to True/False questions — read them carefully before choosing.

30

Questions

45 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

Student Reviews 5.0 / 5 · 1 review

B

Bobby Crane

Pretty close to the real thing. I took my test in Texas and a handful of questions were almost word for word. Not saying they're the exact same obviously but the topics and difficulty felt right. Five stars.

Journeyman Electrician Practice Test 8 — Question List

Question 1: Which of the following shows that the circuit is opened?

A high voltage reading
No voltage reading
A low voltage reading
None of the above

Question 2: A solidly grounded system is the system grounded with high value of resistor or impedance.

True
False

Question 3: The maximum recommended voltage drop in feeder circuit is ................................ percentage

3
4
2
5

NEC Reference: NEC 215.2(A)

Question 4: For conductors used in overhead service less than 600 volts shall have a vertical clearance of .............feet above the roof surface with out any exception.

8
12
6
10

NEC Reference: NEC 230.24

Question 5: A Residence has less than 2 branch circuits, what is the minimum size of 3 wire service required?

25 Amperes
30 Amperes
40 Amperes
20 Amperes

NEC Reference: NEC 230.79(B)

Question 6: What is the smallest size copper wire required for a service entrance conductor supplying limited loads of a single branch circuit?

12 AWG
8 AWG
6 AWG
10 AWG

NEC Reference: NEC 230.31

Question 7: The cross sectional area of the conductors permitted in a seal shall not exceed ................... percent of the cross sectional area of a rigid metal conduit of the same trade size.

20
25
30
45

NEC Reference: NEC 501.15

Question 8: Circuits and equipment operating at less than 50 volts shall have lamp holders of rating not less than ............. watts.

560
660
640
740

NEC Reference: NEC 720.5

Question 9: The outline lighting system shall be at least .............. feet above the areas accessible to vehicles unless protected from physical damage.

14
12
8
15

NEC Reference: NEC 600.9

Question 10: There shall be at least ............ mm airspace between wall and the door of any cabinet containing current carrying conductors whose operating voltage is less then 250 volts.

6
10.5
14.3
12.7

NEC Reference: NEC 312.11

Question 11: Which of the following circuits shall not be connected to system containing trolley wires?

Circuits for lighting
Grounding wires
Ungrounded trolley wires
Bonding wires

NEC Reference: NEC 110.19

Question 12: How many sets of 5-wire feeders shall be permitted to utilize a common neutral?

2
3
4
5

NEC Reference: NEC 215.4

Question 13: Where a fuse used as single phase motor overload protection, it shall be inserted in each .................. conductor.

Grounded
Ungrounded

NEC Reference: NEC 430.36

Question 14: What size THWN conductor is required for a 35A circuit?

8 AWG
6 AWG
10 AWG
12 AWG

NEC Reference: NEC 110.14

Question 15: An electrical circuit feeding two single phase motors with a full load current rating of 50 amperes, 30 amperes respectively. Which of the following is the required dual element time-delay fuse size?

117.5 amperes
128 amperes
80 amperes
95 amperes

NEC Reference: NEC 430.52

Question 16: In a step-up transformer, which winding has more turns?

Primary winding
Secondary winding
Both windings are the same
Neither — turns don't matter

Question 17: In an AC circuit that has only inductive loads (like a motor), how does the current compare to the voltage?

Current leads voltage by 90°
Current is in phase with voltage
Current lags voltage by 90°
Current leads voltage by 45°

Question 18: Class III hazardous locations are those that are hazardous because of the presence of .............

Flammable gases
Combustible dust
Easily ignitable fibers or flyings
Explosive vapors

NEC Reference: NEC 503.5

Question 19: What is the minimum distance a 15 or 20 ampere 125-volt receptacle must be from the inside wall of a swimming pool?

3 feet
6 feet
10 feet
15 feet

NEC Reference: NEC 680.22(A)(1)

Question 20: What is the period (time for one complete cycle) of a 60 Hz AC power supply?

0.60 seconds
0.10 seconds
0.0167 seconds
0.006 seconds

Question 21: A feeder supplies three motors with full-load currents of 30A, 20A, and 10A. What is the minimum feeder ampacity?

60 amperes
67.5 amperes
75 amperes
55 amperes

NEC Reference: NEC 430.17

Question 22: A feeder supplying a separate building must include an equipment grounding conductor (EGC). What happens to the grounded (neutral) conductor at the separate building?

It must be bonded to the EGC
It must NOT be connected to the EGC or ground at the separate building
It can be bonded to any ground rod
It is not needed at separate buildings

NEC Reference: NEC 250.32(B)

Question 23: Why does a short circuit produce a very high current?

Voltage increases during a fault
Near-zero resistance allows very high current
The power factor becomes 0
Resistance doubles during a fault

Question 24: In a 3-phase wye (star) connected system, what is the relationship between line current and phase current?

Line current = phase current × √3
Line current = phase current ÷ √3
Line current = phase current
Line current = phase current × 2

Question 25: NEC 210.63 requires a 125-volt, 15 or 20 ampere receptacle within how many feet of heating, air conditioning, and refrigeration equipment on rooftops or in attics?

10 feet
15 feet
25 feet
50 feet

NEC Reference: NEC 210.63

Question 26: A transformer transfers energy between circuits using electromagnetic induction and has no moving mechanical parts. True or False?

True
False

Question 27: According to NEC 695.6, the power supply for a fire pump must be .............

Connected to the normal power panel
Physically independent from all other wiring
Protected only by a GFCI breaker
Supplied from the same feeder as lighting

NEC Reference: NEC 695.6(A)

Question 28: Electrical metallic tubing (EMT) can be installed in both exposed and concealed locations. True or False?

True
False

NEC Reference: NEC 358.10(A)

Question 29: What information must be shown on the nameplate of every motor?

Only the voltage rating
Only the horsepower and voltage
Rated voltage, frequency, phases, full-load current, temperature rise, and HP
Motor type and serial number only

NEC Reference: NEC 430.7(A)

Question 30: In a 480/277-volt 3-phase 4-wire wye system, what is the voltage from one phase to the neutral conductor?

240 volts
120 volts
277 volts
208 volts

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.

EXAM CARD JOURNEYMAN

Questions30

Time limit45 min

Pass score70%

Code editionNEC 2023

DifficultyIntermediate

Last reviewedJun 2026

Timer starts immediately. Progress is auto-saved.

Source: NEC 2026 (NFPA 70)