Journeyman Electrician Practice Test: Important Question to Prepare

Preparing for the journeyman electrician practice test can feel stressful. The exam covers electrical theory, wiring methods, load calculations, NEC rules, and safety requirements. A strong study plan helps you pass with confidence. Understanding how the test works and practicing realistic questions will sharpen your skills. This guide explains everything you need to know and gives you a full practice test so you can check your progress. Know more about How to Get Electrical Certification in USA & Transfer It to Europe.

Studying smart is the key. Break the preparation into small steps. Read the NEC. Review formulas. Practice calculations. Try sample questions often. This improves accuracy and reduces guessing. The journeyman electrician practice test is designed to evaluate real-world electrical knowledge. You must show that you can work safely and follow code.

Hands-on experience helps you remember concepts faster. Still, written questions can be tricky. Some test items look simple but hide small details. Others require reading NEC tables correctly. Practicing these question styles builds confidence. Use the practice test below to measure your strengths.

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Another important part is managing your exam time. Most test-takers rush through calculation questions. A better strategy is to answer code-based questions first. Then return to calculations. This keeps your pace steady. A structured journeyman electrician practice test like the one below helps you practice this timing approach.

Before you begin the practice test, review key areas:

Core Topics Found in the Journeyman Exam

Electrical Theory Basics

Current, voltage, resistance, and power form the foundation. Know Ohm’s Law and Watt’s Law. Understand series and parallel circuits. These ideas appear in almost every journeyman electrician practice test. Know more about NABCEP Certification for Solar Installers

NEC Layout and Use

Knowing how to locate information in the NEC is crucial. The test checks your ability to navigate code sections quickly. Article 250, Chapter 3 wiring methods, conductor sizing, and overcurrent protection are common topics.

Motor and Transformer Knowledge

Expect questions about motor circuits, overload protection, transformer calculations, and nameplate details.

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Safety Rules and PPE

Electrical safety is a priority. Many questions cover grounding, bonding, shock prevention, and equipment labeling.

Electrical Calculations

Load calculations, box fill, conductor sizing, and voltage drop are frequently tested. Practice these subjects often.

Table: Key NEC Articles Often Tested

Use this table as a quick reference while completing the practice test. It will help you understand where each question fits in the NEC.

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Journeyman Electrician Practice Test: 50 Questions

Multiple-Choice Questions (1–50)

1. What is the unit of electrical resistance?
   A. Ohm
   B. Volt
   C. Ampere
   D. Watt
2. How many volts are in a standard residential branch circuit in the U.S.?
   A. 120
   B. 208
   C. 240
   D. 480
3. Which NEC article covers grounding and bonding?
   A. 300
   B. 250
   C. 430
   D. 110
4. Where are definitions located in the NEC?
   A. Article 90
   B. Article 100
   C. Article 210
   D. Article 240
5. Ohm’s Law states that voltage equals current multiplied by:
   A. Power
   B. Resistance
   C. Watts
   D. Conductance
6. A GFCI trips at approximately how many milliamps?
   A. 10
   B. 15
   C. 4–6
   D. 30
7. What size copper equipment grounding conductor is needed for a 100-amp circuit?
   A. 14 AWG
   B. 12 AWG
   C. 8 AWG
   D. 10 AWG
8. Which conductor color is typically used for grounded (neutral) conductors?
   A. Black
   B. White
   C. Green
   D. Red
9. What is the grounding electrode for a metal underground water pipe?
   A. Optional
   B. Required
   C. Prohibited
   D. Special use only
10. What is the maximum ambient temperature allowed for THHN conductor ampacity?
    A. 30°C
    B. 60°C
    C. 75°C
    D. 90°C
11. A 3-horsepower motor at 230V draws how many full-load amps (approx.)?
    A. 7
    B. 10
    C. 17
    D. 28
12. Which device protects against overcurrent?
    A. GFCI
    B. Circuit breaker
    C. Surge protector
    D. Disconnect switch
13. What is the required burial depth for a PVC conduit with a 120V circuit?
    A. 6 in.
    B. 12 in.
    C. 18 in.
    D. 24 in.
14. What is the formula for power in watts?
    A. P = I × R
    B. P = V ÷ I
    C. P = V × I
    D. P = R ÷ V
15. Which tool measures continuity?
    A. Clamp meter
    B. Megger
    C. Multimeter
    D. Phase tester
16. A 20-amp branch circuit requires what minimum conductor size?
    A. 14 AWG
    B. 12 AWG
    C. 10 AWG
    D. 8 AWG
17. What is the maximum number of 120V receptacles on a 20-amp general circuit (non-residential)?
    A. 6
    B. 10
    C. 13
    D. 15
18. Box fill for a #12 conductor counts as how many cubic inches?
    A. 1.25
    B. 1.5
    C. 2.25
    D. 2.5
19. What is used to connect the electrical service to the utility system?
    A. Feeder
    B. Service drop
    C. Branch circuit
    D. Load side conductor
20. A transformer changes:
    A. Voltage
    B. Frequency
    C. Resistance
    D. Phase only
21. How often must a ladder be inspected?
    A. Monthly
    B. Yearly
    C. Before use
    D. Weekly
22. What determines conductor ampacity?
    A. Color
    B. Temperature rating
    C. Voltage
    D. Device type
23. Voltage drop should not exceed:
    A. 3%
    B. 10%
    C. 15%
    D. 20%
24. A 240V circuit uses how many ungrounded conductors?
    A. 1
    B. 2
    C. 3
    D. 4
25. What is the primary purpose of bonding?
    A. Reduce current
    B. Ensure continuity
    C. Increase voltage
    D. Balance loads
26. A 15-amp lighting circuit uses which conductor size?
    A. 16 AWG
    B. 14 AWG
    C. 12 AWG
    D. 10 AWG
27. NEC Article 430 applies to:
    A. Transformers
    B. Motors
    C. Branch circuits
    D. Overcurrent devices
28. What material is commonly used for grounding rods?
    A. Aluminum
    B. Copper or galvanized steel
    C. Plastic
    D. Rubber
29. A 3-way switch controls:
    A. One light from one location
    B. Two lights from one location
    C. One light from two locations
    D. Two lights from two locations
30. The symbol Ω represents:
    A. Voltage
    B. Power
    C. Resistance
    D. Current
31. Overcurrent devices must be sized at what percentage for motor circuits?
    A. 100%
    B. 125%
    C. 150%
    D. 175%
32. A conductor identified with green insulation is used for:
    A. Neutral
    B. Hot
    C. Grounding
    D. Control circuits
33. Aluminum conductors require:
    A. Anti-oxidant compound
    B. No coating
    C. PVC wrap
    D. Separate grounding
34. A multiwire branch circuit must have:
    A. Shared neutral
    B. Separate breakers
    C. Two neutrals
    D. No grounding
35. What is the smallest size grounding rod allowed?
    A. ½ in. × 6 ft
    B. ⅝ in. × 8 ft
    C. ¾ in. × 4 ft
    D. 1 in. × 2 ft
36. Parallel circuits have:
    A. Equal voltage
    B. Equal resistance
    C. Equal current
    D. Equal impedance
37. What reduces arc flash risk?
    A. Larger wire
    B. Lower voltage
    C. PPE
    D. Smaller loads
38. A 480V system is usually:
    A. Single-phase
    B. Two-phase
    C. Three-phase
    D. Split-phase
39. What is used to test insulation resistance?
    A. Multimeter
    B. Clamp meter
    C. Megger
    D. Receptacle tester
40. A dedicated circuit is required for:
    A. Ceiling fan
    B. Table lamp
    C. Microwave
    D. Smoke detector
41. Service entrance conductors must be sized from:
    A. NEC 250
    B. NEC 310
    C. NEC 430
    D. NEC 240
42. Motors must have:
    A. One disconnect
    B. A separate GFCI
    C. Two grounding points
    D. Two overcurrent devices
43. NEC 210.52 applies to:
    A. Dwelling receptacles
    B. Motor circuits
    C. Pools
    D. Medical buildings
44. A feeder supplies:
    A. Individual loads
    B. Multiple branch circuits
    C. Only lighting
    D. Only receptacles
45. A neutral is required in:
    A. Switch loops
    B. Three-way switches
    C. Most new installations
    D. Motor circuits only
46. A 30-amp circuit needs what minimum wire size?
    A. 14 AWG
    B. 12 AWG
    C. 10 AWG
    D. 8 AWG
47. A multiwire branch circuit requires breakers to be:
    A. Independent
    B. Tied together
    C. Oversized
    D. Undersized
48. When calculating box fill, each device counts as:
    A. 1 conductor
    B. 2 conductors
    C. 3 conductors
    D. 4 conductors
49. The purpose of a disconnect is to:
    A. Increase voltage
    B. Provide a means to open a circuit
    C. Ground equipment
    D. Reduce noise
50. Conduit fill is calculated from:
    A. Chapter 9, Tables 1-4
    B. Article 110
    C. Article 310
    D. Article 406

Answer Key

• 1-A
• 2-A
• 3-B
• 4-B
• 5-B
• 6-C
• 7-D
• 8-B
• 9-B
• 10-D
• 11-C
• 12-B
• 13-C
• 14-C
• 15-C
• 16-B
• 17-C
• 18-D
• 19-B
• 20-A
• 21-C
• 22-B
• 23-A
• 24-B
• 25-B
• 26-B
• 27-B
• 28-B
• 29-C
• 30-C
• 31-D
• 32-C
• 33-A
• 34-A
• 35-B
• 36-A
• 37-C
• 38-C
• 39-C
• 40-C
• 41-B
• 42-A
• 43-A
• 44-B
• 45-C
• 46-C
• 47-B
• 48-B
• 49-B
• 50-A

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