ICC R17 Journeyman Electrician Exam (2023 NEC) Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
- Unlimited attempts
- A new mix each time
- Instant results
Full Practice Exam
Complete exam simulation matching the real Pearson VUE test format.
- 80 questions (same as real exam)
- 240 minute time limit
- 9 topic areas covered
- 368 questions in pool
- Detailed explanations
Texts preferred · 9am–9pm Central
ICC R17 Journeyman Electrician (2023 NEC) Practice Exam Guide
What's on the exam
Questions per topic, out of 80This practice exam is laid out like the official content outline for the ICC R17 Journeyman Electrician (2023 NEC) exam: General Knowledge, Services and Service Equipment, Feeders, Branch Circuits and Conductors, Wiring Methods and Materials, Equipment and Devices, Control Devices, Motors and Generators, Special Occupancies, Equipment, and Conditions.
Two ways to practice: the free practice exam gives you 10 questions per attempt, as often as you want. The full practice exam gives you 80 questions on a 4 hours clock, with a new draw from our question bank every time.
General Knowledge 5 items
Our study plan for this topic: Electrical Theory and General Electrical Load Calculations; Code Definitions and Terms; Plan Reading; AC Circuit Properties: Impedance, Reactance, and Inductance; Power Factor, Power Factor Correction, and Capacitors; NEC Purpose, Scope, and Code Arrangement (Article 90); Series, Parallel, and Combination Circuit Analysis; Electrical Distribution Systems and Wiring Diagrams.
Services and Service Equipment 9 items
The outline lists: Services and Fault Current; Service Load Calculations; Service Equipment & Service Conductors; Transformers; System Grounding and Bonding; Temporary Service Wiring; Service disconnecting means requirements and ratings; Overcurrent protection for services and ground-fault protection of equipment.
Feeders 3 items
Our study plan for this topic: Load Calculations; Equipment Grounding; Feeder conductor sizing (minimum ampacity and continuous vs. noncontinuous loads); Overcurrent protection for feeders; Feeder neutral conductor sizing; Demand factors for dwelling and non-dwelling loads; Outside feeder installation requirements (clearances, supports, and wiring methods); Feeder disconnecting means requirements (rating, location, and number).
Branch Circuits and Conductors 15 items
Our study plan for this topic: Branch Circuit Calculation; Overcurrent Protection; Conductors; Required Outlets & GFCI/AFCI Protection; Equipment Grounding; Voltage Drop Calculations for Branch Circuits; Conductor Ampacity Correction and Adjustment Factors; Conductor Insulation Types and Applications.
Wiring Methods and Materials 21 items
The outline lists: Raceway Installations; Underground Wiring Methods; Boxes and Enclosures; Cabinets, Panelboards, & Switchboards; Clearance and Guarding; Flexible Cords and Cables; Cable Wiring Methods (NM, AC, MC, MI, SE, UF, TC, ITC, and specialty types) — Uses Permitted and Not Permitted; Conduit Bending Calculations and Techniques.
Equipment and Devices 10 items
Our study plan for this topic: Luminaires; Receptacles, Switches and Other Devices; Appliances and Other Equipment; Other Utilization Equipment; Heating and Cooling Equipment; Fixture Wire Types, Ampacity, and Installation Requirements; Lighting Track Installation, Construction, and Restrictions; Low-Voltage Lighting System Requirements and Voltage Limitations.
Control Devices 3 items
Our study plan for this topic: Switches, Disconnects and Controllers; Motor controller ratings, markings, and horsepower requirements; Motor control circuit overcurrent protection and wiring methods; Motor disconnecting means types, location, and current ratings; Motor overload protection devices and settings; Stop-start stations, jogging circuits, and hand-off-automatic control schemes; Industrial control panel overcurrent protection, short-circuit current rating, and marking; Class 1 power-limited remote-control and signaling circuit requirements.
Motors and Generators 5 items
Our study plan for this topic: Motors; Generators; Motor branch-circuit conductor sizing (125% rule and special motor types); Motor overload protection selection and trip current percentages; Motor branch-circuit short-circuit and ground-fault protective device ratings (Table 430.52); Motor disconnecting means requirements and location; Motor controllers — ratings, types, and marking requirements; Motor control centers — overcurrent protection, grounding, and busbar arrangements.
Special Occupancies, Equipment, and Conditions 9 items
The outline lists: Special Occupancies; Swimming Pools and Similar Installations; Mobile Home and RV Parks; Data Processing Equipment; Miscellaneous Special Equipment; Emergency Systems; Signaling and Fire Alarm Systems; Hazardous Location Classification (Classes, Divisions, and Zones).
Sample 1 — Wiring Methods and Materials
Question: A 480V switchboard has exposed live parts front and rear. What is minimum working clearance required?
- A. 3 ft
- B. 4 ft
- C. 5 ft
- D. 6 ft
Correct Answer: B
Exposed live parts on both sides = Condition 3; Table 110.26(A)(1), 151–600V → 4 ft.
Reference: NEC 2023 Table 110.26(A)(1)
Sample 2 — Branch Circuits and Conductors
Question: You are sizing branch circuit conductors for a commercial building's lighting system that operates as a continuous load. The continuous lighting load is 16 amperes and there are no noncontinuous loads on the circuit. What is the minimum ampere rating of the overcurrent protective device for this branch circuit?
- A. 16 amperes
- B. 18 amperes
- C. 20 amperes
- D. 25 amperes
Correct Answer: C
Per NEC 210.20(A), where a branch circuit supplies continuous loads, the rating of the overcurrent device shall not be less than 125 percent of the continuous load. 16 amperes × 1.25 = 20 amperes. The minimum overcurrent protective device rating is 20 amperes.
Reference: NEC 2023 Section 210.20(A)
Sample 3 — Equipment and Devices
Question: What is the maximum distance between supports for lighting track sections that are 1.2 m (4 ft) or shorter in length?
- A. One support per section
- B. Two supports minimum for each section
- C. Three supports evenly spaced
- D. Support every 600 mm (24 in.)
Correct Answer: B
According to NEC 410.154, a single section 1.2 m (4 ft) or shorter in length shall have two supports, and where installed in a continuous row, each individual section of not more than 1.2 m (4 ft) in length shall have one additional support.
Reference: NEC 2023 Section 410.154
Your first attempt is an inspection, not a final grade. The results page breaks your score down by outline topic, so you can see which areas need work. Compare it with the real exam's passing score, 70% correct, and keep practicing until you pass consistently.
- Answer what you know first and bookmark the rest. Our practice exams let you bookmark and come back.
- Work your bookmarks on the second pass.
- Keep your pace. The real exam works out to about 3 minutes per question.
- After each attempt, look up each missed question's reference in your book and read the section.
| Questions | 80 questions |
| Time limit | 4 hours |
| Passing score | 70% correct |
| Books in the exam room | Open book |
| Exam fee | $120 |
- Results for examinations taken electronically are available immediately after the examination is completed.
- You must wait 10 days before retaking a failed exam.
Source: National Contractor/Trades Examination Information Bulletin, PUBLISHED June 30, 2026; ICC Exam Catalog, checked September 27, 2026. Check the bulletin before test day: fees and rules can change.