IA-JE Exam Domains 2026: Complete Guide to All 7 Content Areas

How the Iowa Journeyman Exam Is Built

The Iowa Journeyman Electrician License Exam (IA-JE) is a computer-based, multiple-choice written exam delivered by PSI Services LLC under the Iowa Electrical Examining Board. Licensing is currently administered through the Iowa Department of Inspections, Appeals, & Licensing (DIAL), which is where you will find current forms and sponsorship instructions. Older materials sometimes still reference the State Fire Marshal Division, so treat any document that predates the DIAL transition with caution and confirm details against the current DIAL electrical licensing page.

The format is easy to misread. You will see 88 questions in a 210-minute sitting, but only 80 of those are scored. The scored portion carries 180 minutes, and the eight unscored items add 30 more minutes. You will not know which items are unscored, so every question deserves a real attempt. The passing score is 70% of the scored items, and the exam fee is $87. If you are budgeting beyond the exam itself, our IA-JE certification cost breakdown walks through licensing fees and related expenses, and the IA-JE passing score guide explains exactly how the 70% threshold works.

The Seven Domains and Their Weights

The seven content headings below come from the official examination content outline in the Iowa Department of Public Safety Electrical Examining Board Candidate Information Bulletin (updated September 19, 2025). These are examination headings, not preparation-curriculum headings, which matters because a classroom unit on "grounding" may feed several exam domains at once.

You may notice these weights add up to 101%. The bulletin's publisher explains that rounding can produce totals like this, and we have kept the printed weights exactly as published rather than adjusting them. Treat the percentages as a guide to emphasis, not as a promise of an exact question count in any one domain. Communication Systems appears in other examination outlines in the same bulletin, but it is not part of the journeyman scope here.

Three domains, Wiring and Protection, Wiring Methods and Materials, and Equipment for General Use, together make up 63% of the exam. That concentration should shape how you divide your time, and we return to it in the sequencing section. For a broader look at difficulty, see How Hard Is the IA-JE Exam?

Domain 1: General Electrical Knowledge (13%)

Do not underrate the code-navigation skill here. Because the exam is open-book, a candidate who understands how Chapters 1 through 4 build on one another, and how Chapters 5 through 7 amend them, will locate answers faster than one who simply flips and hopes. Definitions in Article 100 are a frequent source of "which term applies" questions, so mark them for fast access.

An on-screen calculator or a qualifying nonprogrammable calculator is permitted, so practice the math you actually expect to do, not mental shortcuts you will never use in the exam room.

Domain 2: Wiring and Protection (25%)

This is the heaviest domain on the exam, and it deserves the largest share of your preparation. It is where load calculations, conductor sizing, overcurrent protection and grounding and bonding converge.

Calculation questions in this domain are usually multi-step, which is why they reward practice more than memorization. A common failure pattern is finding the correct table but applying the wrong column, or forgetting a correction factor that sits two articles away from the table you used. Build a habit of writing out each step so you can spot the dropped factor on review.

Domain 3: Wiring Methods and Materials (19%)

This domain tests whether you can choose, install and support the raceways, cables, boxes and fittings that make up an actual installation.

Fill calculations are a reliable source of points for prepared candidates and a reliable source of lost points for unprepared ones. They are mechanical, repeatable and entirely open-book, so there is little excuse for missing them if you have practiced. The harder questions are the selection questions, where you must recognize which method is permitted in a described location and which is not.

Domain 4: Equipment for General Use (19%)

Equipment for General Use covers the hardware you install and connect on nearly every job: the equipment that receives, controls and uses power.

Motor questions are a classic pain point because they pull from several parts of the code at once. If you study only one equipment topic in depth, make it motor circuits, since the sizing, protection and disconnect rules interact in ways that trip up even experienced field electricians who rarely calculate them by hand.

Domains 5, 6 and 7: Special Occupancies, Special Equipment, Special Conditions

Chapters 5, 6 and 7 of the NEC modify or supplement the general rules, and the exam reflects that with three distinct domains. They are often discussed together because they share a study approach, but they are scored as separate content headings, and you should keep them separate in your notes and tabbing.

Domain 5: Special Occupancies (13%)

This is the largest of the three special domains at 13%, equal in weight to General Electrical Knowledge. Hazardous locations and agricultural buildings are especially worth attention given the kinds of installations common across Iowa.

Domain 6: Special Equipment (6%)

Domain 7: Special Conditions (6%)

Because the individual weights for Special Equipment and Special Conditions are small, it is tempting to skip them. That is a mistake: with a 70% passing line, a handful of free points from articles you can locate quickly is a meaningful cushion. These are exactly the kinds of questions where good tabbing converts directly into correct answers.

Open-Book Rules and How They Shape Preparation

The exam permits the 2023 NEC or the 2023 NEC Handbook. Candidates should confirm the edition on their own copy before investing in tabs, since using the wrong edition is an avoidable and costly error. The rules on preparing your reference are specific:

• Permitted: pre-highlighting, underlining, indexing and permanent tabs
• Not permitted: Ugly's, handwritten notes, loose or attached additional papers, temporary tabs, and writing in your references during the exam

This changes what "studying" means. Because you can bring the code book but not your own notes, your preparation should produce a reference that is itself the study aid. Tab the major table locations, highlight the recurring definitions, and index the articles that anchor the special domains. Then practice answering questions using only that tabbed book, under timed conditions, because speed of lookup is a skill you must train just as you train the math.

For a compact summary of the facts worth having at your fingertips, see our IA-JE cheat sheet, and for a full preparation roadmap see the IA-JE study guide.

Sequencing Domains in Your Study Plan

Rather than studying domains in the order they are listed, sequence them by dependency and weight. Wiring and Protection and the calculation-heavy parts of the exam should start early and recur, while the special domains are best learned once you can already navigate the general rules.

Notice that the final stage uses 88 questions and 210 minutes rather than stopping at 80 scored items. Practicing the full length builds the stamina you will need, and it prevents the surprise of discovering mid-exam that the clock and the question count are larger than you rehearsed. Use original practice questions, never claimed copies of live items, and review every miss by identifying whether the cause was a knowledge gap, a lookup failure or a math slip. Our practice test platform is built around this kind of timed, domain-tagged review.

Sponsorship, Eligibility and Retake Rules

Knowing the domains is only useful if you can sit for the exam. Board sponsorship is required, and an approval lasts for two attempts or six months. Current forms and administration are handled through the DIAL electrical licensing page. Two principal routes are worth knowing:

• Registered apprenticeship: 8,000 on-the-job hours plus 576 classroom hours, with program completion required for licensure
• Approved postsecondary electrical program (PSEP): program completion plus 6,000 qualifying licensed work hours; under rule 401.2(6)(f), eligible work counts after the program begins, not only after graduation

Other routes exist for existing Class B licensees, certain out-of-state licensees and residential or longtime electricians, but Class B status is not interchangeable with the examined Class A route. One eligibility group, certain Special Electricians with a Residential Endorsement, faces a source conflict between a DIAL affidavit and the text of rule 401.2(6)(d), so anyone in that situation should confirm directly with DIAL. For the full picture, read our IA-JE requirements guide.

These rules make a strong case for preparing thoroughly before your first attempt rather than treating it as a trial run. If you are weighing the investment, see whether the certification is worth it, and for scheduling logistics check exam dates and scheduling.

Frequently Asked Questions

Mastering these seven domains means pairing code-navigation speed with calculation accuracy. For a broader look at how the exam fits into your career path, explore the IA-JE salary guide as a research starting point, and keep practicing under realistic conditions on our main practice test site.