TX-JE Exam Domains 2026: Complete Guide to All 20 Content Areas

How "20 Content Areas" Is Actually Built

The Texas Journeyman Electrician License Exam (TX-JE) is outlined in the TDLR-linked PSI Electrician Candidate Information Bulletin, on printed pages 12-14 of the 25-page PDF. Those pages contain two separate outlines of ten headings each. One covers NEC Knowledge, the other Calculations. Serialized together, they produce the familiar count of 20 domains.

That count is a serialization, not an issuer claim of 20 unique weighted domains. Several heading names repeat across the two outlines (Electrical Feeders, Motors and Generators, and others). Those repeats are distinct, portion-specific rows. A question under Domain 3 asks you to know code rules; the matching Domain 13 asks you to calculate. Do not merge them in your notes, and do not assume that mastering one covers the other.

For a broader orientation to the credential, see What Is TX-JE? and the companion TX-JE Study Guide 2026: How to Pass on Your First Attempt.

Route Format: Two Portions, Two Timers

The two-portion route began March 11, 2025. Both portions are computer-based, multiple-choice written assessments delivered by PSI at its test centers, in English or Spanish. The calculations portion is not a hands-on practical; it is multiple-choice math tested under the same format as the NEC portion.

Each portion has its own timer and its own passing requirement, and unused time does not roll over from one to the other. No required portion order is published, and there is no combined 85-question, four-hour exam on this route. If you see a competitor page describing one long combined sitting, treat it as a version-check flag. Older descriptions often come from superseded bulletins; the TDLR-hosted bulletin updated March 30, 2023 is superseded for this route and should not override the currently linked one.

A tutorial of up to 15 minutes precedes testing but sits outside examination time. For difficulty context, read How Hard Is the TX-JE Exam? Complete Difficulty Guide 2026, and for the arithmetic of passing, TX-JE Passing Score 2026: Exactly What You Need to Pass.

NEC Knowledge Domains 1-10

The NEC Knowledge outline totals 56 scored items. Published scored-item allocations appear in parentheses below.

Calculations Domains 11-20

The Calculations outline totals 24 scored items. Notice that several headings echo the knowledge outline, but the task changes from "what does the code require" to "what is the number."

Two practical points stand out. First, the Domain 14 outline continues onto printed page 14, so a candidate reading only page 13 can miss part of the branch-circuit scope. Second, calculation questions follow a convention worth drilling: assume copper conductors unless the question directs otherwise, and use exceptions or optional calculation methods only when the question tells you to.

Reading Item Allocations Without Inventing Weights

The published subject allocations total 56 for NEC Knowledge and 24 for Calculations. They are item counts, not percentage weights, and this article does not convert them into official percentages. The issuer has not published domain weights in that form.

A sensible reading: Domains 4, 5, and 6 together account for 30 of the 56 scored Knowledge items, so they deserve deep, tabbed familiarity. Domains 8 and 10 are tiny by count, so spend time on them only after the large domains are solid. Remember that three Knowledge questions and two Calculations questions are unscored and unidentified, so you cannot skip any question on the theory that it might not count.

Open-Book Rules and NEC Tabs

This is an open-book exam, but within strict limits. Misreading them is one of the cheapest ways to lose time on test day.

• Bring an allowed soft-bound NEC. Under the current text, any soft-bound edition is admitted, but questions reference the designated tested edition.
• The NEC Handbook is prohibited, as are loose-leaf, spiral-bound, or ring-bound copies.
• Existing notes, highlighting, and underlining in the book are allowed.
• Only permanent index tabs manufactured or provided by the NEC publisher are authorized. Homemade, DIY, or non-NEC tabs are not.
• No added paper, and no writing or marking in the reference during the examination.
• Electronic notepads are supplied for scratch work.
• A silent, battery-powered, nonprogrammable calculator is allowed, with no alphabetic keyboard and no paper printing.

The 2026 NEC Transition and Source Conflicts

The tested reference is NFPA 70, the 2026 National Electrical Code, effective September 1, 2026, under the currently linked bulletin's explicit dated notice. That notice supports a 2026 preparation scope.

The bulletin itself is not perfectly consistent, and it is better to say so than to smooth it over:

• The visible cover says Updated 7/9/2026, while extracted text says Updated 9/15/2026.
• On printed page 8, the rendered allowed-reference line still says 2023 Edition, while extracted text says 2026 Edition. Both representations display the explicit September 1, 2026 transition to the 2026 NEC.

Neither discrepancy is resolved here, and this article does not manufacture a single clean revision label. The practical advice is to confirm the current PSI/TDLR bulletin before buying books or committing to edition-specific practice material. Older competitor pages that describe the 2023 NEC or an aggregate exam are version-check opportunities, not exam authorities. Dates and scheduling are covered further in TX-JE Exam Dates 2026.

Hours, Fees, and Eligibility Mechanics

Domain knowledge is only half of the picture; the registration mechanics trip up plenty of candidates.

Eligibility and issuance are different events. Passing both portions does not by itself produce a license if the 8,000-hour requirement is unmet. Each supervising Master Electrician must verify the applicable experience. Attempts are unlimited within the eligibility period. Renewal continuing education covers the NEC, Texas electrician law and rules, and NFPA 70E safety, but those renewal subjects are not extra exam domains.

On test day, bring matching government identification, arrive 30 minutes early, and note that at least two days' notice is required to cancel or reschedule. Full cost accounting is in TX-JE Certification Cost 2026, and the experience-hour pathway is in TX-JE Requirements 2026. Preparation does not grant eligibility, demonstrate field competence, or issue a license.

Historical Pass Data in Context

TDLR's Fiscal Year 2025 statistics report these separate rows:

• Journeyman NEC: 24.46% (1,402 passes out of 5,731 attempts)
• Journeyman Calculations: 20.56% (1,301 passes out of 6,328 attempts)
• A separate unsplit Journeyman row: 27.52% (1,390 out of 5,050)

Treat these carefully. They are distinct historical attempt-level cohorts, not unique first-time candidates, not a combined-license passing probability, and not results for the 2026 NEC examination. Do not multiply the component rates to estimate an overall chance, and do not substitute the legacy unsplit row for either portion. The fuller discussion lives in TX-JE Pass Rate 2026: What the Data Shows.

Sequencing the Domains in Your Prep

One short structure ties the domain map to a calendar. It assumes you already work in the field and have a tabbed, tested-edition NEC in hand.

Practice each portion on its own clock, since unused time never transfers. When you are ready to test yourself, use the TX-JE practice test site; all questions there are independently authored supplementary preparation, not actual issuer or provider questions, and not an official mock examination. If you want to check readiness against expected earnings or fit before investing, the TX-JE Salary Guide 2026 and Is the TX-JE Certification Worth It? take that up using dated occupational sources instead of claimed license premiums.

Frequently Asked Questions