How Hard Is the NM-EE98 Exam? Complete Difficulty Guide 2026

Overview: Is the NM-EE98 Part 1 Exam Actually Hard?

Difficulty is relative, but for the NM-EE98 Part 1 exam (Commercial and Industrial), the honest answer is: it's demanding, not brutal, and it punishes poor preparation more than it punishes weak general electrical knowledge. This is a code-reference exam administered by PSI on behalf of the New Mexico Regulation and Licensing Department, Construction Industries Division (CID). You're not being asked to recall trivia from memory - you're being asked to locate the correct code provision quickly, interpret it correctly, and apply it to a scenario, 80 times, in 200 minutes.

That works out to roughly 2.5 minutes per question. For straightforward definitional items, that's plenty of time. For a multi-step load calculation or a nuanced grounding-and-bonding scenario that requires cross-referencing two NEC sections, 2.5 minutes disappears fast. The exam's real difficulty lives in that time pressure combined with the breadth of the ten domains you're expected to know cold.

If you want the full domain-by-domain content breakdown before diving into difficulty specifics, the NM-EE98 Exam Domains 2026 guide is the companion piece to this one.

Exam Format and Time Pressure

Part 1 is computer-administered, multiple choice, and open book. Per the PSI candidate information bulletin (revised April 3, 2026), the specifics are:

• 80 questions total
• 200 minutes to complete the exam
• 75% passing score - a minimum of 60 correct answers
• Approved references: the 2020 NEC or NEC Handbook, the 2020 New Mexico Electrical Code, and the 2007 National Electrical Safety Code, all of which must be bound
• A silent, nonprinting, nonprogrammable calculator is allowed

The 200-minute window sounds generous until you factor in code-book lookups. Every minute spent flipping to a table or article eats into the buffer you need for the harder calculation-based questions later in the exam. Candidates who haven't practiced navigating their references under time pressure routinely run short, not because they don't know the material, but because they can't find it fast enough.

Domain Weighting: Where the Difficulty Concentrates

PSI's official allocation across the ten domains tells you exactly where to concentrate study effort. Here's the breakdown of questions per domain out of 80 total:

Domain 1 alone accounts for over 16% of the exam, making it the single largest content area. Combined, Domains 1, 2, 4, and 7 make up half the exam by question count. If your prep time is limited, that's where difficulty and exam weight overlap most heavily.

For a deeper dive into each domain's subtopics and how they map to real installation scenarios, see the complete guide to all 10 content areas.

The Open-Book Trap

New candidates sometimes assume "open book" means "easy." It doesn't. The exam allows the 2020 NEC or NEC Handbook, the 2020 New Mexico Electrical Code, and the 2007 National Electrical Safety Code - but only in bound form. Highlighting, underlining, and permanent tabs are permitted; handwritten notes, loose papers, and temporary tabs are not.

This creates a specific kind of difficulty: you must build your navigational system into your code books ahead of test day, using permanent tabs and highlighting only, because you cannot bring in a cheat sheet or annotated printout. Candidates who show up with an untabbed, unfamiliar code book lose enormous amounts of time simply locating relevant articles.

Calculation-Heavy Domains

The domains most likely to slow candidates down aren't necessarily the largest ones - they're the ones requiring multi-step math under time pressure. Services, Feeders, and Branch Circuits (Domain 2, 10 questions) frequently involves load calculations that require pulling numbers from multiple tables and applying demand factors correctly. Overcurrent Protection (Domain 3, 5 questions), despite its smaller allocation, often involves conductor ampacity adjustments combined with overcurrent device sizing - a two-step process where a single misread table value cascades into a wrong answer.

Motors, Transformers, and Generators (Domain 9, 6 questions) adds another layer: motor branch-circuit calculations, transformer overcurrent protection sizing, and generator-related provisions all require candidates to know which table applies to which equipment type before doing any math at all.

None of these calculations are inherently advanced mathematics - it's arithmetic and table lookups. The difficulty is procedural: knowing the correct sequence of steps and the correct table for the scenario in front of you, under a countdown clock.

How Part 1 Compares to Part 2 and Part 3

Full EE-98 trade qualification requires passing Part 1 (Commercial and Industrial), Part 2 (Residential), and Part 3 (Specialties), unless CID has approved an exemption. Business and Law is a separate requirement, satisfied either by a standalone exam or an approved course. Here's how the three trade-exam parts stack up structurally:

Part 1 is the longest and largest of the three, both in raw question count and time commitment, which is one reason many candidates tackle it first while their broader code knowledge is freshest from initial study. The initial three-part trade-exam fee is $269.06, and each failed part costs $89.69 to retake - separate from the $68.88 Business and Law exam. For the complete fee structure across the qualifying-party application, certificate fees, and retakes, see the NM-EE98 Certification Cost breakdown.

Who Struggles Most on Part 1

Difficulty isn't uniform across candidates. A few patterns show up consistently:

• Residential-heavy electricians moving into commercial/industrial work often underestimate Domain 7 (Hazardous Locations, Special Occupancies, and Special Equipment) because it rarely comes up in residential installations.
• Candidates with no code-book navigation practice lose time on every single question, not just the hard ones, because they're relearning their reference structure mid-exam.
• Candidates who skip Domain 10 (New Mexico State Code) because it's only 4 questions sometimes miss easy points on New Mexico-specific amendments that differ from the base NEC.
• Candidates rushing calculation sections in Domains 2, 3, and 9 without slowing down for table lookups tend to make avoidable arithmetic errors.

None of these are knowledge gaps in the traditional sense - they're preparation and pacing gaps. That distinction matters because it means difficulty is largely manageable with the right prep sequence, not an unavoidable feature of the exam itself.

Building a Realistic Prep Timeline

A focused study plan built around domain weighting, rather than generic study advice, is the most efficient way to reduce Part 1 difficulty. Here's a sample structure that prioritizes the heaviest domains first while still covering the full blueprint:

For a more detailed week-by-week methodology, including how to structure review sessions and self-testing, check the NM-EE98 Study Guide 2026. And if you want a fast reference for the numbers that matter most on exam day - question counts, passing thresholds, fees - the NM-EE98 Cheat Sheet condenses it into one page.

It's also worth understanding who actually needs this exam and why the difficulty is worth tackling. Part 1 is one piece of the qualifying-party pathway toward a New Mexico electrical contractor license, which requires four years (8,000 hours) of relevant experience plus a notarized application before you're even approved to test. If you're still confirming eligibility, review the full NM-EE98 Requirements guide before committing to a study timeline. And if you're weighing whether the investment of time and testing fees pays off long-term, the ROI analysis lays out the practical tradeoffs.

You can also get a feel for realistic question difficulty and pacing by running through timed practice sets on our practice test platform before scheduling your official PSI appointment - it's the closest simulation to the real 200-minute, 80-question format without spending your one retake fee finding out where your weak spots are.

Frequently Asked Questions