What Is CT-E2 Certification?

What Is the CT-E2 Certification, Exactly?

CT-E2 refers to Connecticut's E-2 Unlimited Electrical Journeyperson license exam, overseen by the Connecticut Department of Consumer Protection (DCP) and the Electrical Work Examining Board. It is a state trade credential, not a national certification, and it exists to verify that an electrician has the technical knowledge to work safely and competently under the National Electrical Code within Connecticut's regulatory framework.

Unlike a contractor's license, the E-2 designation is strictly a journeyperson credential. It requires passing the trade examination only - there is no separate Business and Law exam component, which is a common point of confusion for candidates who assume every state license bundles business content with technical content. If you're still sorting out terminology, our companion pieces on what CT-E2 actually is and the meaning behind the acronym go deeper into how this credential is classified.

Who Administers the CT-E2 Exam?

Two organizations split responsibility for this credential. The Connecticut DCP and the Electrical Work Examining Board set the eligibility rules, review applications, and issue the actual license. PSI Services LLC is the third-party testing vendor that builds, schedules, and delivers the computer-based exam itself. Candidates apply to DCP first; DCP approval is required before PSI will allow you to schedule a test session. This sequencing trips up a surprising number of applicants who try to register with PSI before their DCP paperwork clears.

PSI publishes and periodically updates the official exam bulletin - the version referenced for this article was revised February 4, 2026 - which lays out the content outline, allowed materials, and administrative rules candidates must follow. If you want the full breakdown of what's covered on the bulletin's content outline, see the CT-E2 Exam Domains Guide.

Exam Format: What Test Day Actually Looks Like

The CT-E2 exam is computer-based and open-book, administered at a PSI test center. Candidates answer 80 scored questions within a 210-minute time limit. PSI may also insert up to 10 additional unscored questions into the same session - these are indistinguishable from scored items and count toward your total time, but they don't affect your result. This is a standard test-development practice PSI uses to field new questions before they become scored content in future versions of the exam.

A passing score is 70%, which works out to 56 correct answers out of the 80 scored questions. There's no partial credit and no separate cut score by domain - your overall percentage is what matters. For a full explanation of how that threshold is calculated and what it means for guessing strategy, read the CT-E2 Passing Score guide.

The 16 Domains Tested on the CT-E2

PSI's content outline breaks the 80 scored questions across 16 distinct domains, ranging from foundational trade knowledge to specialized systems. The distribution isn't even - some domains carry far more weight than others, which should directly shape how you allocate study time.

Because domain weighting is uneven, spending equal time on all 16 areas is inefficient. The CT-E2 Exam Domains Guide walks through each domain's relative weight and typical question style in more detail, and the CT-E2 Cheat Sheet condenses the must-know facts from all 16 into a single reference page.

Eligibility: Who Can Sit for the CT-E2

Before you can schedule a PSI exam, DCP must approve your eligibility. There are two general paths: completion of an approved apprenticeship program, or documented equivalent experience and training. The equivalency route specifically requires 8,000 on-the-job hours combined with 720 classroom hours - a threshold DCP verifies through submitted documentation before granting approval.

Once DCP approves you, your eligibility window lasts one year, and within that year you may sit for the exam an unlimited number of times. This is a meaningful detail: a failed attempt doesn't reset your clock or require a new application, though each attempt still carries the separate PSI examination fee. For the full eligibility breakdown, including documentation specifics, see CT-E2 Requirements 2026.

Fees, Applications, and the Renewal Cycle

The CT-E2 process involves several distinct fees that are easy to conflate if you're budgeting for the first time. The PSI examination fee is $59 per attempt. Separately, DCP charges a $90 application fee to process your eligibility and license request. Once licensed, annual renewal runs $120.

Licenses expire annually on September 30, and license holders must complete four approved continuing education hours by June 30 each year to remain in good standing - though the first renewal cycle after initial licensure is exempt from this CE requirement. A full cost walkthrough, including how these figures compare across the application lifecycle, is available in CT-E2 Certification Cost 2026.

What You're Allowed to Bring Into the Exam

The CT-E2 is an open-book exam, but "open-book" comes with specific rules. Approved references include the NEC or NEC Handbook (2020 or 2023 editions), Ugly's Electrical References (2020 or 2023), OSHA 29 CFR 1926 with current amendments (or PSI's listed selections from it), NFPA 72 National Fire Alarm Code (2013), Photovoltaic Systems (third edition), Convert Your Home to Solar Energy (2010), and the National Electrical Safety Code (2012).

One reference worth noting specifically: the Solar Photovoltaic Systems Installer Trainee Guide (NCCER, 2012) is useful for building your Photovoltaics domain knowledge while studying, but it is explicitly not allowed in the testing room. Treat it as a study-only resource.

Candidates bring their own copies of approved books. Prior highlighting, underlining, annotation, and permanent tabs in those books are all allowed going into the exam. What's prohibited: adding question-and-answer notes, inserting loose or attached papers, using temporary tabs, or writing anything new during the exam session itself. A silent, nonprinting, nonprogrammable calculator is also permitted.

What an E-2 License Actually Lets You Do

An E-2 Unlimited Electrical Journeyperson license authorizes the holder to perform electrical work, but only as an employee of a properly licensed electrical contractor - it is not a standalone contracting credential. This distinction matters for anyone comparing E-2 to contractor-level licenses: E-2 holders work under a licensed contractor's umbrella rather than independently bidding and running their own electrical business.

In practice, this makes the E-2 a foundational credential for electricians employed by residential, commercial, and industrial electrical contracting firms across Connecticut. If you're evaluating whether pursuing this license makes sense for your career path, or how it stacks up against other options, Is the CT-E2 Certification Worth It? and the CT-E2 Salary Guide address those questions directly. For a look at where E-2 holders typically find work, see CT-E2 Jobs.

Building a Domain-Based Prep Plan

Generic study advice - flashcards, timed drills, spaced review - only helps if it's applied against the CT-E2's actual weighting. Since Raceways and Boxes carries the most scored questions, it deserves the earliest and heaviest attention in a study schedule. Lighter domains like Illuminated Signs still need coverage, but shouldn't consume disproportionate study time relative to their few questions.

Because the exam is open-book, part of your preparation should focus on speed of navigation within your NEC and Ugly's references, not just memorization. Knowing a code section exists is less valuable than being able to locate it in under a minute during a timed exam. Our CT-E2 Study Guide 2026 covers reference-navigation drills in more depth, and if you want a realistic sense of how challenging the format feels for most candidates, How Hard Is the CT-E2 Exam? breaks down the difficulty factors. You can also start practicing with timed, domain-organized questions on our CT-E2 practice test platform to build familiarity with the pacing before test day.

Frequently Asked Questions

For deeper dives into any of these areas - from exam scheduling logistics to a full domain-by-domain study breakdown - explore the related guides linked throughout this article, or head to the CT-E2 practice test homepage to start testing your knowledge against realistic, domain-weighted questions.