Texas Switched to the 2026 NEC on September 1. Two Codes Are Now Live.

The 2026 National Electrical Code became the minimum legal standard for electrical work in Texas on September 1. The Texas Commission of Licensing and Regulation approved the adoption at its July 28 meeting, and Section 73.100 of the Texas Administrative Code now adopts the 2026 NEC as approved by the National Fire Protection Association on September 9, 2025. It applies statewide, inside municipal limits and in unincorporated areas alike.

The rulemaking took the ordinary route. The Texas Department of Licensing and Regulation published the proposal in the March 20 Texas Register and accepted comments through April 20. Texas adopted the national text with one carve-out. It kept Exception No. 2 to Section 210.8(F), which exempts listed outdoor heating, ventilation, and air conditioning equipment from ground-fault circuit interrupter protection, and it kept that exception without an expiration date. Everything else came across as NFPA published it.

The reach is large. TDLR counted 227,117 electrician licensees in fiscal 2025 across its license types, which makes Texas one of the biggest single licensing jurisdictions for the trade in the country. The state code is a floor, not a ceiling, and municipal inspection departments layer their own amendments on top of it, but every commercial jobsite in Texas now answers to the 2026 edition as a baseline.

The rule that governs day one is procedural rather than technical. TDLR keys the applicable edition to the paperwork. Where a permit is required, the installation follows the code edition in effect when the permit was obtained. Where no permit is required, it follows the edition in effect on the day materials or equipment begin to be installed. A warehouse or office project permitted in August stays a 2023 NEC job through closeout. A tenant fit-out permitted this week is a 2026 job. On a phased commercial campus, crews will be working under both editions at once, in all likelihood for more than a year.

The change with the broadest commercial reach is Section 110.16, retitled arc-flash hazard marking. The 2026 edition removes the 1,200-ampere qualifier that had limited labeling to service equipment and feeder-supplied equipment at or above that rating. The requirement now extends to switchboards, switchgear, enclosed panelboards, industrial control panels, meter socket enclosures, and motor control centers likely to require examination or servicing while energized. In a typical commercial building, that is the difference between labeling the service and labeling nearly every distribution assembly in the place.

The label content changed with it. Markings must be permanent, legible to qualified persons, and carry the nominal system voltage, the arc flash boundary, and either the available incident energy at the working distance or the required level of personal protective equipment, along with the date the assessment was completed. Those are outputs of an engineered study, not values a field crew produces on the spot. Contractors bidding new commercial work in Texas are pricing an arc-flash study and a labeling package into jobs where a generic warning sticker satisfied the inspector under the 2023 edition. Owners and facility managers pick up the companion obligation, because labels have to be revisited when system changes alter available fault current.

The other structural change is administrative and touches everyone who runs a load calculation. The 2026 edition consolidates branch-circuit, feeder, and service load calculations into a new Article 120, drawing in material that had been spread across Articles 210, 215, and 220. The calculation methods are largely unchanged. The citations are not. Estimating spreadsheets, office standards, submittal templates, and plan-review comment libraries that reference 220-series sections need a pass before they go out on a 2026-code job.

The licensing consequence arrives next. TDLR states that examination questions are drawn from the current department-adopted bound edition, which as of September 1 is the 2026 NEC. As of this week the department's examination page still named the 2023 edition, so candidates holding a fall test date have reason to confirm which code book governs before buying one. Continuing education providers rebuild their courses around a new edition on their own schedule, and the first renewal cycles under a new code are where the gap between what a licensee last studied and what an inspector now enforces tends to surface.

For electrical contractors and the property owners and facility managers who hire them, the near-term exposure is inspection risk on projects that straddle the date. A job permitted before September 1 that takes a scope change and a fresh permit can land under the newer edition midstream. Contractors who track the permit date on every open job, and who carry arc-flash studies as a priced line item rather than an absorbed cost, are the ones least exposed to a rejected inspection or an unbudgeted engineering fee.

For a journeyman working commercial in Dallas, Houston, or the I-35 corridor, the practical shift is not learning a new book cover to cover. It is knowing which book a given job is on, and expecting arc-flash marking to be checked on gear that never carried a label before.

Texas is the largest licensing state to put the 2026 code into force. The permit date decides which one applies.