CO-JE Exam Domains 2026: Complete Guide to All 13 Content Areas

How the Colorado Journeyman Exam Is Built

The Colorado Journeyman Electrician License Exam is administered by PSI Services LLC on behalf of the Colorado State Electrical Board, which sits within the Division of Professions and Occupations at the Department of Regulatory Agencies. The PSI examination designation is Journeyman Wireman (JW). "CO-JE" is simply this site's shorthand for the exam; it is not an official exam code, so when you search the Board's or PSI's materials, look for the Journeyman Wireman examination and the Candidate Information Bulletin.

The format is computer-based multiple choice. You face 90 scored questions in 240 minutes. Separately, up to 10 additional unscored items may appear, and if they do, you receive 30 extra minutes. You will not be told which items are experimental, so treat every question as if it counts. The passing standard is 70%, which works out to 63 scored answers correct. Scores are provided after testing.

The Board's bulletin organizes the exam into 13 content headings. Those headings describe what can be tested; they are not a preparation curriculum, and the Board does not publish percentage weights. What it does publish is an item allocation for each heading, and that is the most useful planning data you have. For a broader orientation, see What Is CO-JE? and the companion CO-JE Study Guide 2026.

Item Allocation by Content Area

The published allocations total 90 scored items. Here they are in the Board's heading order:

Two observations matter. First, Grounding and Bonding is the single largest block at 14 items, which is more than 15% of the scored exam by simple division of item counts (note that this is arithmetic on allocations, not an official percentage weight). Second, General Electrical Knowledge (11) is the next largest, followed by Services, Feeders, and Branch Circuits (9) and Electrical Calculations (9). Photovoltaics has only 2 items and Transformers only 4, so they deserve proportionally less of your time, though not zero.

The NEC Edition Question You Must Settle First

This is the most time-sensitive issue for 2026 candidates, and the source material contains a genuine conflict that you should not paper over. The retrieved bulletin text states that, effective August 1, 2026, exam questions are consistent with the 2026 NEC and that PSI supplies the 2026 NEC. It also says a 2023 book may be requested until December 1, 2026, after which that option ends. Meanwhile, older introductory and rendered reference text in the same bulletin still specifies NEC 2023.

What does that mean for you? Three practical points:

• Confirm directly with PSI. Before you book an appointment, verify which NEC edition applies to your test date and how reference books are provided at your center.
• Do not assume a choice of exam. The availability of a 2023 reference book does not mean you can choose a separate 2023-based exam. Treat the edition question as a reference-book and content-alignment issue, and get written or documented clarification.
• Do not treat code adoption and exam transition as the same thing. The Board's adoption timeline for the NEC and the exam's stated transition date are separate pieces of evidence. Rely on the bulletin and PSI for exam content, not on assumptions from adoption dates.

Practice with the edition you will actually be tested on. Article numbers, table locations, and some requirements shift between editions, so navigating the wrong edition under time pressure costs real minutes. Our exam dates and scheduling guide covers how to time your appointment around this transition.

Grounding and Bonding: The Heaviest Content Area

With 14 scored items, Grounding and Bonding deserves the largest single block of your practice time. It is also an area where candidates often confuse closely related concepts, because the NEC distinguishes sharply between grounding, bonding, and the grounded conductor.

Because the exam is open book with a PSI-supplied NEC, a strong approach is to practice answering these questions by finding the relevant Code article quickly rather than by memorizing every rule. Build a habit: identify the system type, find the governing article, locate the table, then verify the conditions of use. Pair this with our one-page cheat sheet for quick reference on key facts, and review the difficulty guide to understand why candidates find some areas harder than others.

Electrical Calculations and General Electrical Knowledge

Domain 13: Electrical Calculations (9 items)

The bulletin explicitly recommends reviewing electrical theory and common formulas in addition to learning to navigate the Code. PSI supplies the NEC and a formula page, and an on-screen calculator is available. That means you do not need to memorize every formula from scratch, but you do need to know which formula applies and how to use it quickly.

• Ohm's law and power relationships in series, parallel, and combination circuits.
• Voltage drop calculations and what they imply for conductor sizing.
• Single-phase and three-phase power relationships.
• Load calculations for services and feeders using Code methods.
• Conductor ampacity adjustment and correction applications.

Practice with the on-screen calculator style rather than a handheld habit, since interface familiarity saves seconds that add up over 90 questions.

Domain 1: General Electrical Knowledge (11 items)

With 11 items, this is the second-largest area, and it is broad. It tends to cover the fundamentals that underpin everything else: definitions, basic theory, safety concepts, and general Code requirements. Because it is broad, candidates sometimes underestimate it. Review the Code's definitions and general requirements articles, because many questions in this area can be answered quickly if you know where those definitions live.

Services, Feeders, Branch Circuits, and Overcurrent Protection

These two areas are closely linked. A feeder question may require you to size the overcurrent device, then check conductor ampacity, then confirm grounding requirements. Practicing integrated problems helps more than isolated drills.

Conductors, Raceways, Devices, and Boxes

These areas reward efficient Code navigation. Raceway and box fill questions often involve tables and counting rules, so practice them under timed conditions.

Motors, Transformers, Special Equipment, Occupancies, and Photovoltaics

For special equipment, occupancies, and PV, the skill being tested is largely "know which article governs and read it carefully." Because the Code is available during the exam, spend your study time practicing the lookup, not memorizing exceptions.

Sequencing Your Preparation by Content Area

You do not need a generic study framework here. You need a sequence that reflects the allocations and the way the areas build on each other. One reasonable ordering:

This is a template, not a rule. If your daily work already involves motor circuits or service installations, shorten those blocks and extend your weaker areas. Use the CO-JE Exam Prep practice test to identify which content areas need the most attention, then adjust. Our training overview discusses how classroom hours and self-study fit together.

Registration, Eligibility, and Costs

In Colorado, the sequence matters: you take and pass the examination before submitting your license application. Passing alone does not establish licensing eligibility; the Board reviews your documented experience and education separately.

Experience and Training Requirements

• 8,000 qualifying hours over at least four years.
• Within those, 2,000 hours over at least two years in commercial, industrial, or substantially similar work.
• At least 288 classroom-training hours during the last eight years of training, apprenticeship, or practical experience, documented separately from on-the-job hours.

Enacted SB25-165 (signed June 3, 2025) changed these requirements and supersedes older descriptions that cited 4,000 commercial/industrial hours and a different classroom lookback. It also permits the Board to credit older training upon evidence of at least four additional hours on the current or immediately previous NEC or other adopted standards. This is a Board-reviewed exception, not automatic credit. Rule detail on the 288-hour requirement, including 10 to 40 hours of OSHA-curriculum safety instruction, comes from the Board's rules; confirm the current wording, since a version effective July 15, 2026 appears in the rule register. See CO-JE Requirements 2026 for the full eligibility picture.

Exam Fees and Retakes

The examination fee does not include licensing or renewal charges, which were not independently verified here. After a failed attempt, the bulletin permits scheduling from the following day for the next available test date with the retest fee, but it does not promise an immediate seat. For a fuller breakdown, see CO-JE Certification Cost 2026 and CO-JE Passing Score 2026.

Renewal and Continuing Education

Colorado licenses renew on a three-year cycle with 24 continuing education hours, including at least four hours on NEC changes and no more than four credited safety hours. Initial licenses obtained by examination during October 1, 2023 through September 30, 2026 are exempt from CE until after their first renewal. The current cycle expires September 30, 2026. Do not treat any post-expiration renewal window as permission to practice on an expired license.

Frequently Asked Questions