Jefferson City Missouri Journeyman Electrician (ICC - R17) Exam Prep - Live Virtual + Self Study Training

Prepare for the Jefferson City, Missouri Journeyman Electrician licensing examination with a flexible training program that combines a complete online self-study course, recorded instruction, and live virtual classes covering the 2023 National Electrical Code, electrical theory, calculations, services, feeders, branch circuits, wiring methods, grounding, bonding, motors, transformers, equipment, controls, and special electrical installations.

The ICC R17 Journeyman Electrician examination is based on the 2023 edition of NFPA 70, the National Electrical Code. It evaluates a candidate’s ability to locate, interpret, and apply electrical requirements in an open-book testing environment. Candidates need practical trade knowledge, calculation skills, and an organized approach to using the NEC under time limits.

Jefferson City accepts the ICC G17 Journeyman Electrician examination series as part of its local journeyman licensing process. The City’s current application requires a journeyman examination based on the 2020 National Electrical Code or a newer edition, making the 2023 NEC-based R17 exam suitable for meeting the stated code-cycle requirement.

Journeyman electrician preparation involves more than memorizing individual NEC sections. Candidates must understand how definitions, general installation rules, equipment-specific articles, tables, exceptions, and calculations work together. A single question may require conductor sizing, overcurrent protection, grounding, equipment-rating information, and a specialized rule found in another part of the code.

This Jefferson City Missouri Journeyman Electrician exam prep program provides three connected ways to study. The complete online course offers an organized self-paced path through the principal examination subjects. Recorded classes allow students to pause technical explanations, repeat calculations, and revisit NEC navigation demonstrations. Live virtual classes provide scheduled instructor-led training organized around the reference books and electrical topics covered by the R17 examination.

The training covers the following references:

• National Electrical Code Handbook, 2023
• Ugly's Electrical References

The 2023 National Electrical Code Handbook combines the full NEC text with explanatory material that supports understanding of electrical rules, calculations, equipment requirements, wiring methods, grounding, bonding, and specialized installations. The handbook format is useful during preparation because it helps connect code language with diagrams, examples, and practical explanations.

Ugly's Electrical References complements NEC preparation by providing compact access to electrical formulas, conductor data, motor information, transformer information, voltage-drop guidance, electrical units, grounding concepts, conversions, and frequently used trade calculations.

Because this is a seminar-style training program that covers National Electrical Code navigation, electrical calculations, services, feeders, branch circuits, conductor sizing, grounding, bonding, raceways, cables, boxes, motors, transformers, generators, controls, equipment, and special installations, you only need to attend the sessions covering the books and subjects included on your specific examination.

Live Class Schedule

The live training schedule is organized around the books and technical references used on the exam.

Because this is a seminar-style training program that covers the 2023 National Electrical Code, electrical theory, load calculations, wiring methods, conductor ampacity, services, feeders, grounding, bonding, motors, transformers, equipment, and special electrical conditions, you only need to attend the sessions covering the books included on your specific exam.

The live virtual classes complement the complete online course and recorded instruction. Students can begin with self-paced lessons, attend applicable live sessions for guided review, and return to the recordings whenever they need additional help with an NEC article, electrical formula, load calculation, conductor-sizing problem, grounding provision, motor requirement, transformer question, or reference-navigation method.

Click Here to View the Current Live Class Schedule

What You Get

• Complete Online Course: Organized self-study instruction covering the principal electrical subjects associated with the ICC R17 Journeyman Electrician examination.
• Recorded Classes: Recorded lessons that allow you to pause instruction, repeat calculations, and revisit difficult NEC topics according to your schedule.
• Live Virtual Classes: Scheduled instructor-led training organized around the National Electrical Code and the electrical subjects included with this product.
• NEC Navigation Guidance: Training focused on locating definitions, articles, tables, exceptions, calculations, and installation requirements in the 2023 National Electrical Code.
• Electrical Calculation Review: Preparation involving electrical theory, services, feeders, branch circuits, conductor ampacity, voltage drop, box fill, raceway fill, motors, and transformers.
• Grounding and Bonding Review: Study support involving grounding electrode systems, equipment grounding conductors, bonding jumpers, service bonding, separately derived systems, and effective fault-current paths.
• Wiring Methods Preparation: Review involving raceways, cables, boxes, fittings, conductor support, environmental conditions, physical protection, and permitted installation methods.
• Equipment Review: Preparation covering motors, controllers, transformers, generators, appliances, heating equipment, lighting systems, disconnecting means, and electrical utilization equipment.
• Practice-Oriented Study Structure: Guidance for recognizing the subject of a question, selecting the correct NEC location, completing the required analysis, and managing examination time.

Exam Details

The ICC R17 Journeyman Electrician examination is based on the 2023 National Electrical Code. The exam contains 80 multiple-choice questions, and candidates are allowed four hours to complete it.

The examination evaluates journeyman-level knowledge across a broad range of electrical systems and installation requirements. Candidates should be prepared to work with both direct code questions and multi-step calculation problems.

Important preparation areas include:

• General electrical knowledge and theory
• Definitions and electrical terminology
• Services and service equipment
• Feeder calculations and installation requirements
• Branch circuits and required outlets
• Load calculations and demand factors
• Conductor ampacity and insulation ratings
• Temperature correction and adjustment factors
• Overcurrent protection
• Grounding and bonding
• Grounding electrode systems
• Raceways, cables, boxes, and fittings
• Box-fill and raceway-fill calculations
• Motors, motor circuits, and controllers
• Transformers and separately derived systems
• Generators and standby systems
• Lighting, appliances, and utilization equipment
• Special occupancies and hazardous locations
• Special equipment and special conditions
• Communications and limited-energy systems

Wiring methods and materials represent a major part of journeyman electrician preparation. Candidates should understand the permitted and prohibited uses of common raceways and cable systems, conductor support, physical protection, wet-location requirements, box sizing, raceway fill, and installation restrictions.

Branch-circuit and conductor questions may involve connected loads, continuous loads, conductor sizing, required receptacles, lighting circuits, overcurrent protection, insulation ratings, terminal-temperature limitations, and equipment requirements.

Service and feeder questions may require candidates to calculate loads, apply demand factors, select conductors, determine overcurrent protection, evaluate disconnecting means, and apply grounding and bonding requirements.

Motor questions may require several NEC steps. A candidate may need to determine full-load current, branch-circuit conductor size, short-circuit and ground-fault protection, overload protection, controller ratings, disconnecting means, and feeder requirements.

Transformer questions may involve primary and secondary conductor sizing, overcurrent protection, grounding, bonding, transformer vaults, and separately derived systems. Ugly's Electrical References can help reinforce transformer ratios, current calculations, and common trade formulas during preparation.

With 80 questions and four hours available, candidates have an average of three minutes per question. Direct code questions may require less time, while calculations and multi-section research questions may require more. Timed practice helps develop an efficient and balanced testing pace.

Open Book Test

The ICC R17 Journeyman Electrician examination is an open-book test. Candidates may use qualifying bound references in accordance with current ICC contractor and trades examination policies.

The 2023 National Electrical Code is the primary examination reference. The National Electrical Code Handbook contains the full NEC text along with explanatory material, making it useful for preparation and code study. Examination questions are based on the listed approved references and the assigned code cycle.

Open-book testing still requires strong code familiarity. Candidates should understand the organization of the NEC, including Article 100 definitions, the general requirements in Chapters 1 through 4, the specialized provisions in Chapters 5 through 7, communications systems in Chapter 8, and the calculation tables in Chapter 9.

Practice recognizing the likely article before opening the book. Service questions commonly lead to Article 230. Grounding and bonding questions frequently involve Article 250. Motors are addressed in Article 430, transformers in Article 450, and generators in Article 445.

Ugly's Electrical References supports preparation involving formulas, conductor properties, voltage drop, grounding, motors, transformers, electrical units, and conversions. It should complement direct NEC study rather than replace familiarity with the code.

During timed practice, read the entire question before searching. Determine whether it asks for a minimum, maximum, permitted, prohibited, or required condition. Locate the applicable rule, review nearby exceptions, and confirm that the answer matches the exact wording of the question.

Licensing Steps

1. Review Jefferson City’s journeyman requirements. Confirm that the current City application and accepted examination list match your licensing goal.
2. Complete the required apprenticeship experience. Jefferson City requires documentation of 8,000 hours completed as an electrical apprentice.
3. Prepare detailed employer records. Apprenticeship hours must be documented on company letterhead and organized by the periods in which the hours were completed.
4. Select an accepted examination. The City accepts the ICC G17 Journeyman Electrician examination series and requires a test based on the 2020 NEC or a newer edition.
5. Register for the ICC R17 examination. Use the current ICC exam registration process to purchase and schedule the 2023 NEC-based journeyman test.
6. Prepare the approved references. Study the 2023 National Electrical Code Handbook and use Ugly's Electrical References for calculations and technical review.
7. Complete structured exam preparation. Review electrical theory, code navigation, services, feeders, branch circuits, wiring methods, grounding, motors, transformers, and equipment.
8. Pass the examination. Jefferson City requires a minimum journeyman examination score of 70 percent.
9. Obtain the official score report. Keep a copy of the examination result for submission with the City application.
10. Submit the local license application. Provide the application, documented apprenticeship hours, examination results, and required municipal fee.
11. Receive City approval. Complete the review process before performing electrical work that requires a Jefferson City journeyman license.

State Requirements

Missouri does not use one individual statewide journeyman electrician license that replaces every municipal licensing requirement. Jefferson City administers local electrical licenses for apprentices, journeyman electricians, master electricians, and electrical contractors.

Electrical contractors and their employees must obtain the appropriate trade licenses before performing regulated electrical work within Jefferson City limits. A journeyman license is an individual trade credential and is separate from the licenses required to operate an electrical contracting business.

The City currently requires journeyman applicants to document 8,000 hours of work as an electrical apprentice. Employer documentation must be provided on company letterhead and must show the periods during which the apprenticeship hours were accumulated.

Applicants must also pass an ICC or Prometric journeyman electrician examination based on the 2020 National Electrical Code or a newer edition. The minimum passing score accepted by the City is 70 percent.

The R17 examination uses the 2023 National Electrical Code and meets the City’s stated requirement for an examination based on the 2020 NEC or a newer code edition.

Passing the ICC examination does not automatically issue the municipal license. Applicants must provide the required application, experience documentation, official examination results, and applicable fee to Jefferson City.

A journeyman electrician license does not by itself authorize the holder to operate an electrical contracting company or obtain permits as a licensed electrical contractor. Additional master, contractor, business, insurance, and state requirements may apply.

Licensees must also complete the City’s renewal process to maintain an active credential. Electrical work must comply with the code edition and local requirements adopted by the authority having jurisdiction.

Reference Books

• National Electrical Code Handbook, 2023
  The primary code reference for the ICC R17 examination. It contains the 2023 National Electrical Code text and explanatory material covering definitions, branch circuits, feeders, services, grounding, bonding, overcurrent protection, wiring methods, conductors, equipment, motors, transformers, generators, special occupancies, special equipment, and communications systems.
• Ugly's Electrical References
  A compact electrical reference supporting preparation involving formulas, conductor data, voltage drop, electrical units, grounding, motors, transformers, conversions, and commonly used trade calculations.

Test Information and Study Materials

Begin preparation by learning the organization of the 2023 NEC. Create focused study areas for services, feeders, branch circuits, conductor ampacity, overcurrent protection, grounding, bonding, wiring methods, equipment, motors, transformers, generators, and special installations.

Review electrical theory until the primary relationships are familiar. Practice voltage, current, resistance, power, series circuits, parallel circuits, alternating current, power factor, and voltage drop. Use Ugly's Electrical References to reinforce formulas and common electrical data.

Complete service and feeder calculations using the 2023 NEC. Practice general lighting loads, receptacle loads, appliances, continuous loads, motors, heating equipment, air-conditioning equipment, demand factors, neutral calculations, and conductor selection.

Study conductor ampacity carefully. Practice applying insulation ratings, terminal-temperature limitations, ambient-temperature corrections, adjustment factors, conductor-use restrictions, and equipment termination requirements.

Give grounding and bonding focused attention. Review grounding electrode systems, grounding electrode conductors, equipment grounding conductors, bonding jumpers, service bonding, separately derived systems, and effective ground-fault current paths.

Practice box-fill and raceway-fill calculations. Learn which conductors, clamps, fittings, equipment grounding conductors, and devices count toward box volume. Review how conductor quantities and raceway types affect permitted fill.

Complete timed practice with the 2023 NEC. Read the question, identify the topic, locate the likely article or table, apply the requirement, complete the calculation, and move forward. Mark difficult questions for later review instead of allowing one problem to consume too much testing time.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Jefferson City journeyman electrician candidates turn a large electrical code and a broad technical examination into an organized preparation plan. The training connects electrical theory, calculations, code requirements, wiring methods, grounding, equipment, motors, transformers, and special installations with the subjects associated with the ICC R17 exam.

The complete online course provides flexibility for apprentices, electricians, maintenance professionals, electrical workers, supervisors, and experienced tradespeople. Recorded instruction allows students to repeat difficult lessons, revisit calculations, and review NEC navigation demonstrations whenever additional practice is needed.

Live virtual classes add instructor-led structure to the preparation process. Sessions are organized around the books and technical subjects, allowing students to attend the classes covering the references included with their examination product.

The training emphasizes organized study guidance, trade-focused review, practice-oriented preparation, reference navigation, calculation skills, and confidence-building study structure. Students develop a repeatable method for identifying the topic, choosing the correct NEC location, applying the rule, completing the calculation, and checking the result.

Frequently Asked Questions

What is included with this Jefferson City Missouri Journeyman Electrician exam prep program?

The program includes the complete online self-study course, recorded instruction, and scheduled live virtual classes covering the electrical code, calculations, wiring methods, equipment, and journeyman-level subjects included with the product.

What does R17 mean?

R17 is the ICC exam code for the Journeyman Electrician examination based on the 2023 National Electrical Code.

How many questions are on the ICC R17 examination?

The examination contains 80 multiple-choice questions.

How much time is allowed?

Candidates are allowed four hours to complete the examination.

Is the ICC R17 examination open book?

Yes. The R17 Journeyman Electrician examination is open book and uses qualifying references permitted under current ICC examination policies.

Which National Electrical Code edition does this course cover?

This exam prep program covers the 2023 National Electrical Code.

How many apprenticeship hours does Jefferson City require?

Jefferson City requires documentation of 8,000 hours completed as an electrical apprentice.

What examination score does Jefferson City require?

The City requires a minimum score of 70 percent on an accepted ICC or Prometric journeyman electrician examination.

Does the R17 exam meet Jefferson City’s code-edition requirement?

Yes. Jefferson City requires an examination based on the 2020 NEC or a newer edition, and the R17 examination is based on the 2023 NEC.

Does passing the ICC examination automatically issue the local license?

No. Applicants must also submit the City application, documented apprenticeship hours, examination results, the applicable fee, and all required supporting information.

Do I need to attend every live class?

No. Attend the sessions covering the books and electrical subjects included with your examination product while using the complete online course and recordings for continued review.