AZ-EC Passing Score 2026: Exactly What You Need to Pass

What the AZ-EC Passing Score Actually Is

The Arizona C-11 (CR-11) Electrical (Commercial) trade examination - what this site calls AZ-EC - is scored on a straightforward pass line: 70% of 110 scored questions, administered under Arizona Registrar of Contractors rules through PSI Services LLC. There's no curve, no scaled scoring formula, and no partial credit for close answers. You either hit the required correct-answer count or you don't.

What trips people up isn't the math - it's the format. The exam gives you 240 minutes for a computer-based, multiple-choice test that you can sit either at a physical PSI test center or through remote proctoring. Before you assume that time is generous, remember PSI is allowed to slip in 5 to 10 additional unscored experimental questions without adding extra minutes to your clock. Those questions look identical to scored ones, so you can't skip them or guess your way past them faster - you have to treat every item on screen as if it counts, because functionally, some percentage of them don't, and you won't know which ones.

The Raw Score Math Behind 70%

Seventy percent of 110 scored questions is 77 correct answers. That's the number to internalize - not "70%," but "77 out of 110." Thinking in raw counts helps during practice testing because it lets you track exactly how many misses you can absorb per domain without guessing at percentages in your head mid-exam.

Here's the practical takeaway: with 110 scored items and possibly up to 10 unscored ones mixed in, you could see anywhere from 110 to 120 questions total. Missing 33 or fewer of the scored questions still gets you a passing result. That means the exam isn't designed to punish a handful of shaky topics - it's designed to catch candidates who are broadly underprepared across multiple domains at once.

If you want a deeper breakdown of how difficult that bar actually is to clear in practice, the AZ-EC difficulty guide walks through what makes certain domains harder to master than the raw numbers suggest.

Domain Weighting: Where Your 77 Points Come From

PSI's published blueprint breaks the 110 scored items across 15 content domains. Some domains carry three or four times the weight of others, which means your study hours should not be distributed evenly. Here's the full allocation:

Notice how lopsided this is. Illuminated Signs carries a single question. Devices carries two. Meanwhile three domains tie at 13 items apiece. If you spend equal study time on all 15 domains, you're wasting hours on low-yield content while underexposing yourself to the sections that actually move your score. For a full walkthrough of what each domain covers conceptually, see the complete domain guide.

The Three Tied Domains That Decide Your Outcome

Service Feeders and Branch Circuits, Grounding and Bonding, and Special Occupancies and Equipment are tied for the largest weight on the blueprint at 13 items each. Together they represent 39 of your 110 scored questions - over a third of the exam sitting in three content areas.

This isn't a coincidence of exam design; it reflects how commercial electrical work is actually performed in the field. Feeder sizing, branch circuit layout, grounding electrode systems, bonding jumpers, and the special rules governing hazardous locations, health care facilities, and other commercial occupancy types are the daily-use knowledge for anyone qualifying a C-11 license. If your calculations on ampacity, voltage drop, or grounding electrode conductor sizing are shaky, that weakness gets tested repeatedly rather than once.

Open-Book Rules That Affect Your Score

The AZ-EC trade exam is open-book, but the rules around what "open-book" means are specific and matter to your score. Approved references are the 2017 National Electrical Code, the NFPA 72 National Fire Alarm Code (2016 edition), and the designated 29 CFR 1926 OSHA reference. You're allowed to bring these books pre-highlighted, underlined, annotated, and permanently tabbed - meaning your prep work before test day is a direct scoring advantage.

What you cannot do is add loose papers or write in the books during the exam itself, and remote testing candidates lose the ability to take breaks or use scratch paper entirely. That last detail matters more than it sounds: if you're planning to test remotely, your calculation strategy needs to be entirely mental or done through the on-screen tools PSI provides, since there's no scratch paper fallback. You'll also need a basic non-scientific, non-programmable calculator that meets PSI's device rules - bringing the wrong calculator model can cost you time you don't have to spare.

If You Fall Short: Retakes and the Two-Year Clock

If you don't reach 77 correct answers, the retake structure is fixed: a 30-day waiting period applies after a failed attempt, extending to 90 days once you've failed three or more times. There's no way to shorten that window, so a failed attempt has a real calendar cost, not just a financial one.

On the other side of a pass, there's a different clock to watch: a qualifying exam pass must be applied toward your license application within two years. Passing early and then sitting on the result for years past that window means testing again from scratch. If your business formation, bonding, or background check paperwork is going to take a while, plan your exam date accordingly rather than passing the trade exam long before the rest of your application is ready.

For the full picture of what surrounds the exam itself - bonding, insurance, experience documentation, and the qualifying party requirements - see the AZ-EC requirements breakdown.

A Domain-Weighted Study Timeline

Generic study techniques only help if they're pointed at the right targets. Here's a timeline built around the actual item counts rather than an even split across 15 domains:

Space repeated review sessions across the heavier domains rather than a single pass through the material - you'll retain the feeder-sizing and grounding calculations better if you revisit them across multiple weeks instead of cramming them once. For a more detailed week-by-week study framework, the AZ-EC study guide expands on sequencing and practice testing cadence.

Registration and Fee Mechanics

The trade exam fee is $66, paid separately from the Statutes and Rules Exam, which costs $61 through the ROC's online process. Both exams are required parts of qualifying a C-11 license, but they're scored and scheduled independently - passing the trade exam doesn't automatically satisfy the statutes and rules requirement, and vice versa.

Because these are separate line items with separate score requirements, budget and schedule for both rather than treating the trade exam as the only hurdle. If you want a full accounting of every cost associated with becoming license-ready - application fees, bonding, insurance - the AZ-EC cost breakdown lays out the complete picture. And if you're still mapping out when to sit for either exam relative to your business paperwork timeline, the exam scheduling guide covers testing windows and deadlines in more depth.

Before you register, it's worth running a set of full-length timed questions on a practice testing platform built around this exact blueprint so you know where your raw score sits relative to 77 correct before you pay for a real attempt.

Beyond the Pass Line: What a Passing Score Doesn't Cover

Hitting 70% gets you the trade exam credential, but it doesn't complete your path to licensure on its own. The qualifying party still needs to document four years of practical or management trade experience, with at least two of those years falling within the preceding ten - though qualifying education or manufacturer training can offset up to two years of that requirement. Application review, background checks, bonding, and insurance all run alongside the exam requirement, not after it.

It's also worth remembering that once licensed, the contractor license itself runs on a two-year renewal cycle requiring a filing, a fee, and a maintained bond - passing the exam is a gate you pass through once, but staying licensed is an ongoing obligation. If you're weighing whether the entire process is worth pursuing given all these moving pieces, the ROI analysis looks at the full picture beyond just the exam itself. And if you want a broader sense of how test-takers generally perform against this specific blueprint, the pass rate data is worth reviewing before you set your own target date.

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