- You need 70% of 100 scored questions correct; 10 unscored items don't count against you.
- Wiring and Protection, Wiring Methods and Materials, and Equipment for General Use together make up 65% of the scored exam.
- The exam is open-book from the 2023 NEC or 2023 NEC Handbook only - no Ugly's, no handwritten notes.
- Board sponsorship and PSI authorization must happen before you can schedule, and each authorization covers two attempts or six months.
What the IA-ME Exam Actually Tests
The Iowa Master Electrician License Exam (IA-ME) is the Class A Master Electrician examination administered on behalf of the Iowa Electrical Examining Board, part of the Department of Inspections, Appeals, and Licensing (DIAL). This guide focuses on the Class A master pathway - the credential most electrical contractors need to pull permits and supervise work statewide - not the separate Residential Master examination track. PSI Services LLC delivers the computer-based test, and DIAL relies on PSI's published bulletin for scheduling rules, fees, and testing policy.
Unlike a generic licensing quiz, the IA-ME is built around the 2023 National Electrical Code, which Iowa confirmed has been the reference edition for testing since January 1, 2024. If you studied an older code cycle, or you're leaning on notes from a different state's exam, you're preparing for the wrong test. Before you go further, it's worth reviewing the full IA-ME Requirements page to confirm your experience hours qualify you to sit for this specific exam.
Registration, Sponsorship, and Fees
Getting a seat for the IA-ME isn't as simple as paying PSI and picking a date. Iowa requires Board sponsorship and authorization before PSI scheduling opens up. That authorization window covers two attempts or six months, whichever comes first - so if you don't pass on your first try, you generally have one more shot inside that same window before you need a new authorization.
- Exam fee: $87 per the PSI-hosted bulletin (updated September 19, 2025).
- Full license fee: $375 for the three-year Class A master license, prorated by issuance month. The current cycle runs 2026-2028.
- Eligibility: Standard route requires one year of Board-acceptable experience as a licensed Class A or Class B journeyman. Active Class B masters can use the examination-upgrade route instead.
- Validity window: A passed exam must be used within 24 months of the license application - don't pass early and then sit on the result for years.
For a full cost picture, including how the $87 exam fee and $375 license fee interact across a licensing cycle, see the IA-ME Certification Cost 2026: Complete Pricing Breakdown. And if you're weighing whether the time and expense of a Class A upgrade is worth it, the Is the IA-ME Certification Worth It? Complete ROI Analysis 2026 article walks through that decision in more depth.
Key Takeaway
Apply for Board sponsorship well ahead of any target test date. Scheduling with PSI cannot happen until that authorization is in place, and it expires after two attempts or six months.
Exam Format and Rules You Must Know
The IA-ME is a computer-based, multiple-choice, open-book exam with a very specific structure:
- 110 total questions - 100 scored, 10 unscored (you won't know which is which).
- 270 total minutes - 240 minutes for the scored portion, plus 30 minutes allotted for the unscored items.
- Passing score: 70% of the 100 scored questions. See the IA-ME Passing Score 2026: Exactly What You Need to Pass guide for how that threshold plays out in practice.
Because it's open-book, code-book management is as much a skill as code knowledge. Only the 2023 NEC or 2023 NEC Handbook are approved. You're allowed to bring a book with advance highlighting, underlining, and permanent indexing already in place - but handwritten notes, removable tabs, extra papers, and Ugly's Electrical References are explicitly prohibited on test day. Calculator-wise, use either the on-screen calculator provided by the testing software or your own approved nonprogrammable, nonprinting calculator.
If you need to reschedule, do it early: cancellations and reschedules must happen at least two days before your test date, or you risk forfeiting your attempt. For a broader sense of how the exam's structure compares to what candidates expect going in, read How Hard Is the IA-ME Exam? Complete Difficulty Guide 2026.
Domain Breakdown: Where to Spend Your Study Hours
The IA-ME scored content is split across eight domains, and three of them dominate the exam. Understanding this weighting is the single most important planning decision you'll make.
| Domain | Weight |
|---|---|
| Wiring and Protection | 25% |
| Wiring Methods and Materials | 20% |
| Equipment for General Use | 20% |
| General Electrical Knowledge | 10% |
| Special Occupancies | 10% |
| Special Equipment | 5% |
| Special Conditions | 5% |
| Communication Systems | 5% |
Wiring and Protection, Wiring Methods and Materials, and Equipment for General Use combine for 65% of the scored questions. That means two-thirds of your exam outcome hinges on three domains, not eight equally weighted topics. A full walkthrough of every domain, with topic-level detail, is available in the IA-ME Exam Domains 2026: Complete Guide to All 8 Content Areas.
Wiring and Protection (25%)
This is the single heaviest domain on the exam. Candidates need fluency with branch circuit and feeder calculations, overcurrent protection sizing, grounding and bonding requirements, and conductor ampacity adjustments.
- Branch circuit, feeder, and service load calculations
- Overcurrent device selection and coordination
- Grounding and bonding of systems and equipment
Wiring Methods and Materials (20%)
Expect questions on conductor and raceway selection, box and enclosure sizing, and installation requirements for different wiring methods under varying conditions.
- Raceway fill and box sizing calculations
- Conductor types, insulation, and ampacity tables
- Support, securing, and protection requirements for wiring methods
Equipment for General Use (20%)
This domain covers switches, receptacles, motors, transformers, and general-use equipment installation rules - practical, code-driven questions rooted in everyday commercial and industrial work.
- Motor and transformer overcurrent protection and disconnect rules
- Receptacle, switch, and appliance installation requirements
- Equipment grounding and disconnecting means
The remaining domains - Special Occupancies, Special Equipment, Special Conditions, and Communication Systems - are lighter individually but still worth deliberate review, since a handful of questions can be the margin between passing and retaking. Don't skip them entirely just because they're 5-10% each.
A Domain-Weighted Study Timeline
A generic study calendar treats every topic equally. For the IA-ME, your calendar should mirror the exam's weighting - more weeks on Wiring and Protection, fewer on Communication Systems.
Wiring and Protection
- Drill load calculations, feeder sizing, and overcurrent protection scenarios daily
- Build permanent tabs in your 2023 NEC for Articles 210, 215, 240, and 250
Wiring Methods and Materials + Equipment for General Use
- Practice raceway fill and box sizing problems under a timer
- Work through motor, transformer, and receptacle installation rules
General Electrical Knowledge and Special Occupancies
- Review general theory, definitions, and hazardous or special-occupancy rules
- Take a full-length practice exam at 270 minutes to build endurance
Special Equipment, Special Conditions, Communication Systems
- Cover the remaining lighter-weighted domains in focused sessions
- Re-index your NEC based on questions you missed in practice
Notice the pattern: two full weeks on Wiring and Protection alone, matching its 25% weight, versus a shared week for three lighter domains. This is the kind of schedule that reflects the actual exam blueprint rather than a one-size-fits-all study plan. For daily drilling once your book is tabbed, the practice test platform lets you rehearse open-book navigation under realistic time pressure.
Retake Rules and Continuing Education
Iowa's retake policy escalates in stages, and it's worth knowing before you sit for the first time:
- After two failures: wait six months and complete 12 approved continuing-education hours before testing again.
- After four failures: the same six-month wait and 12-hour continuing-education requirement apply again.
- After six failures: further attempts require Board approval, following a petition and an additional six-month wait.
This structure rewards focused first-attempt preparation. Rather than treating the exam as something you can brute-force through repeated tries, build your prep around the domain weighting above and use realistic practice questions before you burn an attempt. If you want a data-informed sense of how candidates typically perform, see IA-ME Pass Rate 2026: What the Data Shows.
Key Takeaway
Every failed attempt costs the $87 exam fee again, plus potential months of delay once you hit the two- or four-failure continuing-education requirement. First-attempt preparation is materially cheaper than repeated retakes.
After You Pass: Licensing and Renewal
Passing the exam is a milestone, not the finish line. Your passed exam must be used within 24 months to apply for the license, and the Class A master license itself runs on a three-year term - the current cycle is 2026-2028, with initial fees prorated based on your issuance month.
Renewal isn't automatic either. A full three-year term requires 18 approved continuing-education hours, including at least six NEC-specific hours per DIAL's continuing-education guidance. If your initial license term is shorter than three years because of when you were issued, the requirement scales down to six hours for each year or partial year licensed.
Once licensed, many electricians look at how the Class A master credential opens doors on job boards and with contractors seeking a supervising electrician; the IA-ME Jobs page and IA-ME Salary Guide 2026: Complete Earnings Analysis cover what comes after licensure. If you're still mapping out formal coursework before you test, IA-ME Training is a useful next stop.
Frequently Asked Questions
You need 70% of the 100 scored questions correct. The exam includes 10 additional unscored questions mixed in, but they don't count toward your pass/fail result.
The 2023 NEC. Iowa confirmed this edition has been used for testing since January 1, 2024, and it's also the only edition (or its Handbook version) you're allowed to bring into the exam room.
No. Only the 2023 NEC or 2023 NEC Handbook are approved, and only with advance highlighting, underlining, and permanent indexing. Handwritten notes, removable tabs, extra papers, and Ugly's Electrical References are all prohibited.
Board authorization covers two attempts or six months, whichever occurs first. You must complete your scheduling and testing within that window or seek renewed authorization.
After two failures, you must wait six months and complete 12 approved continuing-education hours before retesting. The same wait and education requirement apply again after four failures. After six failures, you need Board approval via petition plus another six-month wait.
For a condensed, single-page reference you can review the night before test day, bookmark the IA-ME Cheat Sheet 2026: One-Page Review of Must-Know Facts, and run through timed questions on the practice exam platform to confirm you're ready before you spend your $87 attempt.