Texas Master Electrical Contractor Book Package

Prepare for the Texas Master Electrician examination and the technical responsibilities associated with operating or qualifying an electrical contracting business with the National Electrical Code, NEC, 2026 Edition. Texas adopted the 2026 National Electrical Code effective September 1, 2026, and the current TDLR electrician examination information identifies the 2026 NEC as the examination reference.

The Texas Master Electrician examination is administered through PSI for the Texas Department of Licensing and Regulation (TDLR). The examination is divided into two separate portions: an NEC Knowledge Portion and a Calculations Portion. Both portions are multiple choice, and candidates must earn at least 70% on each portion.

The Texas Master Electrician credential is also closely connected to the Texas Electrical Contractor license. Texas requires an Electrical Contractor business to employ a licensed Master Electrician as its Master Electrician of Record, although the business owner may personally hold the Master Electrician license and assign that license to the company. For candidates planning to operate an electrical contracting business, earning the Master Electrician license can therefore be an important step toward meeting the contractor-license structure established by TDLR.

The 2026 National Electrical Code is the central technical reference for this package. Candidates should be prepared to navigate services, feeders, branch circuits, conductor sizing, wiring methods, grounding and bonding, electrical equipment, motors, generators, controls, disconnects, special occupancies, special equipment, special conditions, renewable-energy systems, and advanced electrical calculations.

Master-level preparation requires more than memorizing code sections. Candidates need to understand how NEC rules interact and how to apply tables, exceptions, adjustment factors, demand factors, equipment requirements, and calculation procedures. Efficient reference navigation is especially important because the examination is open book but subject to strict time limits.

Exam Details

The Texas Master Electrician examination currently consists of two separately timed portions. Both portions must be passed with a minimum score of 70%.

NEC Knowledge Portion:

• Total Items: 75, including 5 non-scored items
• Time Allowed: 150 minutes
• Passing Score: 70%
• Format: Multiple choice

The NEC Knowledge Portion is divided into the following subject areas:

• Definitions, Theory, and Plans: 7 items
• Electrical Services, Service Equipment, and Separately Derived Systems: 11 items
• Electrical Feeders: 7 items
• Branch Circuit Conductors: 11 items
• Electrical Wiring Methods and Electrical Materials: 7 items
• Electrical Equipment and Devices: 7 items
• Motors and Generators: 7 items
• Electrical Control Devices and Disconnecting Means: 3 items
• Special Occupancies, Equipment, and Conditions: 7 items
• Renewable Energy Technologies: 3 items

Calculations Portion:

• Total Items: 33, including 3 non-scored items
• Time Allowed: 170 minutes
• Passing Score: 70%
• Format: Multiple choice

The Calculations Portion includes:

• Calculations and Theory: 2 items
• Electrical Services, Service Equipment, and Separately Derived Systems: 8 items
• Electrical Feeders: 3 items
• Branch Circuit Calculations and Conductors: 4 items
• Electrical Wiring Methods and Electrical Materials: 2 items
• Electrical Equipment and Devices: 2 items
• Motors and Generators: 6 items
• Electrical Control Devices and Disconnecting Means: 1 item
• Special Occupancies, Equipment, and Conditions: 1 item
• Renewable Energy Technologies: 1 item

Unless a question specifically states otherwise, examination conductors are treated as copper.

Open Book Test

The Texas Master Electrician examination is an open book test.

The current TDLR examination information allows candidates to reference the National Electrical Code, 2026 Edition. Candidates are responsible for bringing their own NEC book to the examination center.

A soft-bound edition of the National Electrical Code may be used. Loose-leaf, spiral-bound, and ring-bound NEC copies are not permitted in the examination room. The NEC Handbook is also not permitted as the examination reference.

The NEC book may be highlighted and underlined before the examination and may contain notes made before the testing session. Permanent index tabs manufactured or provided for use with the NEC book may be used under the examination rules.

Candidates may not write, highlight, underline, index, or otherwise mark the NEC during the examination session. Homemade tabs, non-NEC tabs, temporary removable markers, and additional loose paper are not permitted.

Open-book preparation should therefore include organizing the NEC before exam day and practicing navigation. Candidates should know where to locate frequently tested subjects instead of relying on the index for every question.

Licensing Steps

1. Hold a Texas Journeyman Electrician license for at least two years. Texas requires Master Electrician applicants to have held the Journeyman Electrician license for the required period.
2. Complete the required on-the-job training. Applicants must document at least 12,000 hours of on-the-job training under the supervision of a Master Electrician licensed in Texas.
3. Obtain experience verification. Qualifying experience must be documented through the appropriate TDLR experience-verification process.
4. Submit the Master Electrician application. The application is reviewed by TDLR before examination eligibility is granted.
5. Receive examination authorization. Once approved, candidates receive instructions for scheduling the Master Electrician examination through PSI.
6. Prepare with the 2026 NEC. Review both the NEC Knowledge and Calculations content outlines and practice using the current code edition.
7. Take the NEC Knowledge Portion. Complete the 75-item portion within 150 minutes.
8. Take the Calculations Portion. Complete the 33-item portion within 170 minutes.
9. Pass both portions. A minimum score of 70% is required on each portion.
10. Complete the licensing process. After satisfying the examination and eligibility requirements, complete any remaining TDLR requirements for issuance of the Master Electrician license.

State Requirements

Texas requires a Master Electrician applicant to have held a Journeyman Electrician license for at least two years. Journeyman Industrial Electrician experience does not substitute for the Journeyman Electrician license requirement for this pathway.

The applicant must also document at least 12,000 hours of on-the-job training under the supervision of a Texas-licensed Master Electrician. TDLR requires qualifying experience to be properly verified.

A Texas Master Electrician is authorized to install, maintain, or extend electrical wiring systems and the equipment associated with the use of electrical energy, including service-entrance conductors, within the scope established by Texas law.

The Master Electrician license is an individual credential. The Electrical Contractor license is a separate business credential. To obtain or maintain an Electrical Contractor license, the business must employ a licensed Master Electrician as the Master Electrician of Record, or the business owner may serve in that role if the owner personally holds the Master Electrician license.

A Master Electrician generally may be assigned to one Electrical Contractor unless the Master Electrician owns more than 50% of the electrical contracting business under the applicable Texas rules.

Texas adopted the 2026 National Electrical Code as the state electrical code effective September 1, 2026. The adoption includes a limited Texas exception relating to certain ground-fault circuit-interrupter requirements for outdoor outlets serving HVAC equipment.

Reference Books

• National Electrical Code, NEC, 2026
  The primary technical reference for the current Texas Master Electrician examination. The 2026 NEC covers electrical installations, services, feeders, branch circuits, grounding and bonding, wiring methods, conductor requirements, equipment, motors, generators, special occupancies, special equipment, special conditions, communications systems, renewable-energy technologies, tables, and electrical calculations.

Exam Room Approved Books

• National Electrical Code, NEC, 2026
  The current TDLR examination information permits the 2026 National Electrical Code as the examination reference. Candidates must bring an acceptable soft-bound NEC edition that complies with the testing-center rules.

The NEC may be highlighted, underlined, and contain permitted notes prepared before the examination. Permanent NEC index tabs are allowed under the applicable testing rules. Loose-leaf, spiral-bound, and ring-bound copies are not permitted, and the NEC Handbook is not allowed as the examination reference.

Test Information and Study Materials

Definitions, Theory, and Plans: Review Article 100 definitions, electrical theory, plan interpretation, conductor properties, voltage, current, resistance, power, and the terminology used throughout the NEC.

Services: Services are heavily represented in both examination portions. Study Article 230, service conductors, service equipment, disconnecting means, service ratings, grounding, bonding, and available service configurations.

Separately Derived Systems: Review transformers, grounding and bonding of separately derived systems, system bonding jumpers, grounding electrode conductors, and related Article 250 requirements.

Feeders: Study Article 215 requirements, feeder conductor sizing, ampacity, overcurrent protection, grounding and bonding, neutral calculations, and feeder demand calculations.

Branch Circuits: Branch-circuit conductors are one of the largest NEC Knowledge categories. Review Article 210, conductor sizing, loads, required circuits, receptacle requirements, GFCI protection, AFCI protection, and branch-circuit ratings.

Load Calculations: Master-level candidates should be comfortable with Article 220 calculations involving dwelling units, commercial loads, lighting, receptacles, appliances, ranges, dryers, motors, heating, cooling, demand factors, and service or feeder sizing.

Grounding and Bonding: Study Article 250 in depth. Review grounding electrode systems, equipment grounding conductors, bonding jumpers, services, separately derived systems, feeders, grounding electrode conductor sizing, and fault-current paths.

Wiring Methods: Review Chapter 3 wiring methods, conductor installation, raceways, cables, boxes, conduit bodies, supports, wet locations, underground installations, physical protection, and conductor fill.

Conductor Ampacity: Practice using Article 310 tables, temperature limitations, conductor insulation ratings, adjustment factors, correction factors, parallel conductors, and equipment termination requirements.

Raceway and Box Calculations: Review raceway fill, box fill, conductor volume allowances, pull-box sizing, conductor bending space, and Chapter 9 tables.

Electrical Equipment: Study equipment for general use, including switches, receptacles, luminaires, transformers, appliances, heating equipment, storage batteries, and related Chapter 4 requirements.

Motors and Generators: Motors and generators represent a significant portion of the Calculations exam. Review Article 430 motor full-load currents, conductor sizing, overload protection, branch-circuit short-circuit and ground-fault protection, controllers, disconnecting means, and multiple-motor calculations.

Controls and Disconnects: Review control equipment, disconnect ratings, location requirements, accessibility, grouped disconnects, and equipment-specific disconnecting requirements.

Special Occupancies: Prepare for hazardous locations, health-care facilities, assembly occupancies, commercial garages, marinas, agricultural buildings, and other Chapter 5 installations.

Special Equipment: Review elevators, signs, cranes, welders, generators, electric vehicle power-transfer systems, photovoltaic systems, energy storage systems, pools, fountains, and other Chapter 6 equipment.

Special Conditions: Study emergency systems, legally required standby systems, optional standby systems, energy storage, interconnected power-production sources, and other Chapter 7 requirements.

Renewable Energy Technologies: Review photovoltaic systems, energy storage, interconnected sources, and related NEC requirements. Renewable-energy topics appear in both examination portions.

Timed Practice: The NEC Knowledge Portion allows 150 minutes for 75 items, while the Calculations Portion allows 170 minutes for 33 items. Practice code lookups and calculations separately because the allotted time from one portion does not carry over to the other.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Texas Master Electrician candidates organize NEC study around the actual examination structure. Preparation can focus separately on knowledge-based code navigation and calculation-heavy subjects, reflecting the two-part format used by the Texas Master Electrician examination.

Trade-focused review reinforces services, feeders, branch circuits, grounding and bonding, wiring methods, conductors, motors, generators, special occupancies, special equipment, renewable-energy technologies, and the advanced calculations expected at the master level.

Reference-navigation practice is especially valuable because the 2026 NEC is the primary exam-room reference. Candidates can develop familiarity with article locations, tables, exceptions, definitions, and cross-references so less time is spent searching during the examination.

Calculation-oriented preparation can strengthen service calculations, feeder calculations, branch-circuit loads, motors, transformers, conductor sizing, raceway fill, box fill, grounding-conductor sizing, and other NEC mathematical applications.

For candidates planning to operate an electrical contracting business, Master Electrician preparation also supports understanding of the professional role of the Master Electrician of Record within the Texas Electrical Contractor licensing structure.

The goal is to combine organized study guidance, advanced electrical review, NEC navigation, calculation practice, and confidence-building study structure without guaranteeing a particular examination score, license approval, or business outcome.

Frequently Asked Questions

What code edition is used for the current Texas Master Electrician exam?

The current Texas electrician examination information identifies the 2026 National Electrical Code as the examination reference.

Is the Texas Master Electrician exam open book?

Yes. The examination is an open book test, and candidates may use an acceptable 2026 NEC reference that complies with current examination rules.

How many parts are on the Master Electrician exam?

The current Texas Master Electrician examination has two portions: an NEC Knowledge Portion and a Calculations Portion.

How many questions are on the NEC Knowledge Portion?

The NEC Knowledge Portion contains 75 items, including 5 non-scored items, with 150 minutes allowed.

How many questions are on the Calculations Portion?

The Calculations Portion contains 33 items, including 3 non-scored items, with 170 minutes allowed.

What score is required to pass?

Candidates must earn at least 70% on each examination portion.

Can extra time from one portion be used on the other portion?

No. Time remaining after one examination portion does not carry over to the other portion.

Can I use the NEC Handbook in the exam?

No. The NEC Handbook is not permitted as the examination-room reference.

Can my NEC be highlighted and tabbed?

The NEC may be highlighted, underlined, and contain permitted notes prepared before the exam. Permanent NEC index tabs are allowed, while homemade or temporary removable tabs are prohibited.

How much experience is required for a Texas Master Electrician license?

Applicants must have held a Texas Journeyman Electrician license for at least two years and document at least 12,000 hours of on-the-job training under the supervision of a Texas-licensed Master Electrician.

Is a Master Electrician license the same as an Electrical Contractor license?

No. The Master Electrician license is an individual credential, while the Electrical Contractor license is a business license. A Texas Electrical Contractor must employ or be operated by a licensed Master Electrician who serves as the Master Electrician of Record.

What should I focus on most when studying?

Focus on services, branch circuits, feeders, grounding and bonding, conductor sizing, wiring methods, motors, generators, load calculations, special occupancies, special equipment, renewable-energy systems, and fast navigation of the 2026 NEC.