Texas Residential Wireman License Exam: What's on the Test and How to Pass It
A complete guide to the Texas Residential Wireman license exam — exam format, NEC content, Texas law, and how to study effectively.
Published April 15, 2026
The Texas Residential Wireman exam is administered by the Texas Department of Licensing and Regulation (TDLR) and is the first independently licensed electrical level in Texas — the step between apprentice and journeyman specifically for residential work. It is an open-book NEC exam with a strong Texas law component. This guide covers what it tests and how to pass it.
What the License Authorizes
A Texas Residential Wireman license authorizes you to perform electrical work on single-family homes, duplexes, and other Class A dwellings without direct supervision from a Journeyman or Master Electrician. Residential Wiremen can pull residential permits and work independently on residential projects, but the license does not authorize commercial electrical work. It is a popular credential for electricians who specialize in new home construction and residential remodeling.
Exam Format
- Questions: 60 multiple-choice questions
- Time limit: 3 hours
- Format: Open book — NEC codebook permitted
- Passing score: 70%
- Administered by: PSI at testing centers across Texas
- Cost: $74 per attempt
Experience Requirements
Before sitting for the Residential Wireman exam, you must document 4,000 hours (two years) of electrical work experience as an apprentice or helper under a licensed electrician. TDLR requires employer verification. This is half the experience required for the Journeyman exam, making the Residential Wireman a faster path to independent residential work for electricians who want to specialize in that sector.
What the Exam Covers
Residential Wiring Methods
NEC Article 334 (Nonmetallic Sheathed Cable — Romex) is the most important article for residential wiremen. Cable types (NM, NMC, NMS), permitted uses, support requirements, stapling and support spacing, and installation in concealed and exposed locations. Conduit use in residential settings, underground feeder cable (Article 340), and service entrance cable (Article 338) also appear.
Branch Circuits and Receptacle Requirements
Small appliance circuits, laundry circuits, and bathroom circuits — their required ratings and dedicated circuit requirements. Receptacle placement rules (spacing requirements in living areas, kitchen counter requirements, outdoor and garage receptacle requirements) are consistently tested. Know Article 210 well enough to answer receptacle spacing and circuit requirement questions without lengthy code searches.
AFCI and GFCI Protection
This is the highest-density topic on the residential wireman exam. AFCI protection is now required in virtually all rooms of a dwelling — know the current NEC list of required locations precisely. GFCI protection requirements for kitchens, bathrooms, garages, outdoors, crawl spaces, and unfinished basements are equally important. These questions should be answerable from memory, saving code lookup time for calculation questions.
Service Entrance and Panels
Residential service sizing calculations using Article 220 Part III (standard calculation method) and the optional calculation method for existing dwellings. Panel location and clearance requirements, main disconnect requirements, and grounding electrode system installation for residential services. The 200-amp service sizing calculation for a typical single-family home appears regularly.
Texas Residential Electrical Law
TDLR licensing rules specific to Residential Wiremen — what the license authorizes, supervision requirements, permit-pulling authority, and the limits of the residential wireman scope compared to journeyman and master licenses. The exam tests whether candidates understand the specific boundaries of their license — what they can and cannot do independently.
How the Residential Wireman Exam Differs from the Journeyman
The residential wireman exam is narrower but not necessarily easier within its scope. It focuses entirely on residential NEC chapters and articles — no commercial conduit, no motor circuits, no hazardous locations. The tradeoff is that residential-specific topics like AFCI/GFCI protection and cable wiring methods are tested more deeply than on the journeyman exam. Candidates who have worked exclusively in residential construction often find the scope comfortable but the AFCI/GFCI detail level demanding.
How to Study
Tab your NEC for Articles 210, 220, 230, 250, 310, 334, 338, and 340 — these cover the majority of the exam content. Memorize the AFCI and GFCI required locations before your exam date so you are not spending lookup time on those questions. Practice the residential load calculation using Article 220 Part III until the steps are automatic. In your final week, take timed practice exams and track which articles you are navigating to most slowly — those are your remaining study targets.
After You Pass
Your Residential Wireman license is renewed annually with 4 hours of continuing education. With an additional two years of experience after obtaining the residential wireman license, you can sit for the Texas Journeyman Electrician exam — which expands your license to cover commercial work and increases your earning potential significantly.