Texas Master Electrical Contractor - Online Exam Prep

Prepare for the Texas Master Electrician licensing examination with a comprehensive online exam-preparation program built around the National Electrical Code, NEC, 2026. This Texas Master Electrical Contractor Online Exam Prep package is designed for experienced electricians working toward the Master Electrician credential and seeking structured preparation for both the NEC Knowledge Portion and the Calculations Portion of the state examination.

Texas Master Electrician examinations are administered through PSI for the Texas Department of Licensing and Regulation. Texas adopted the 2026 National Electrical Code effective September 1, 2026, and the current electrician examinations reference the 2026 NEC.

Master-level preparation requires more than memorizing code sections. Candidates need to understand how NEC rules apply to services, feeders, branch circuits, conductors, wiring methods, electrical equipment, motors, generators, controls, special installations, renewable-energy technologies, and complex electrical calculations. The examination is divided into two portions, which means candidates must prepare for direct code-knowledge questions as well as calculation-heavy questions requiring accurate application of NEC requirements.

The included 2026 NEC provides the primary technical reference used for the examination. Candidates can use the codebook alongside the online exam-preparation material to build familiarity with articles, tables, definitions, exceptions, conductor requirements, load calculations, and cross-references.

The Master Electrician examination represents an advanced level of Texas electrical licensing. Candidates are expected to bring together practical electrical experience, code knowledge, calculation ability, and the skill to locate and apply NEC provisions under timed testing conditions.

The online exam-preparation format helps organize the material into manageable areas of study. Candidates can concentrate separately on services, feeders, branch circuits, wiring methods, equipment, motors, special occupancies, and renewable energy before combining these areas during broader practice.

Please allow up to 15 business days for tabbed and highlighted book package orders.

Exam Details

The Texas Master Electrician examination consists of two separate portions: the NEC Knowledge Portion and the Calculations Portion. Both portions are multiple choice, and candidates must pass each portion 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 covers 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

Time remaining after completion of one examination portion does not transfer to the other portion. Candidates therefore need a separate time-management strategy for code-knowledge questions and calculation questions.

Unless a question specifically states otherwise, conductors are considered copper for examination purposes.

Open Book Test

The Texas Master Electrician examination is an open book test.

The approved technical reference is the National Electrical Code, NEC, 2026 Edition. Candidates are responsible for bringing their own compliant NEC book to the testing center.

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

The NEC may be highlighted, underlined, and contain notes completed before the examination session. Permanent index tabs manufactured or provided by the NEC publisher are permitted. Homemade, DIY, or non-NEC tabs are not allowed.

Candidates may not write, highlight, underline, index, or otherwise mark the NEC during the examination session. Additional loose, taped, adhered, or stapled paper is prohibited.

Open-book testing still requires strong preparation. Candidates should know which NEC chapter or article is likely to contain the answer before searching. Master-level questions frequently combine several provisions, so simply looking for keywords may not be enough.

Licensing Steps

1. Hold a Texas Journeyman Electrician license. The Master Electrician pathway builds on the Journeyman Electrician credential.
2. Maintain the Journeyman Electrician license for at least two years. Texas requires the applicant to have held the Journeyman Electrician license for the required period before applying for Master Electrician licensure.
3. Complete the required electrical experience. Applicants must document at least 12,000 hours of on-the-job training under the supervision of a Master Electrician licensed in Texas.
4. Obtain experience verification. Each supervising Master Electrician must verify the qualifying experience used for the application.
5. Submit the Master Electrician license application. The completed application and required documentation are submitted to the Texas Department of Licensing and Regulation.
6. Receive examination approval. TDLR reviews the application and notifies approved applicants that they may take the licensing examination.
7. Schedule through PSI. Eligible candidates schedule the Master Electrician examination with the state testing provider.
8. Prepare for both examination portions. Study the NEC Knowledge Portion separately from the Calculations Portion while also practicing combined code application.
9. Use the 2026 NEC during preparation. Become familiar with articles, tables, calculations, definitions, and common cross-references.
10. Pass both examination portions. A minimum score of 70% is required on each portion.
11. Complete all remaining licensing requirements. Satisfy the applicable TDLR requirements for issuance of the Master Electrician license.

State Requirements

A Texas Master Electrician is licensed to install, maintain, or extend electrical wiring systems and related apparatus, equipment, and service entrance conductors within the scope established by Texas law.

Applicants must have held a Texas Journeyman Electrician license for at least two years before applying for the Master Electrician license.

Applicants must also document at least 12,000 hours of on-the-job training under the supervision of a Texas-licensed Master Electrician.

Journeyman Industrial Electrician experience may not be used to satisfy the experience requirement for the Texas Master Electrician license.

The qualifying experience must be documented and signed by each supervising Master Electrician. TDLR may verify the information submitted with the application.

The Texas Master Electrician license is an individual license. It is distinct from a Texas Electrical Contractor business license. An electrical contracting business must satisfy the separate requirements applicable to Electrical Contractors, including the required Master Electrician of Record structure.

Texas electrician licenses are valid for one year from the date of issuance and are subject to renewal requirements.

The 2026 National Electrical Code became the state electrical code effective September 1, 2026, and the current Master Electrician examination is referenced to this edition.

Reference Books

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

The NEC should be used throughout the online exam-preparation process. Repeated code navigation helps candidates move beyond simply recognizing a subject and develop the ability to locate the exact section, table, exception, or calculation method needed to answer a question.

Please allow up to 15 business days for tabbed and highlighted book package orders.

Exam Room Approved Books

• National Electrical Code, NEC, 2026
  The 2026 National Electrical Code is the approved technical reference for the current Texas Master Electrician examination. Candidates must bring an acceptable soft-bound edition that complies with PSI examination-room rules.

Permitted preparation may include highlighting, underlining, notes made before testing, and permanent publisher-manufactured NEC index tabs. Loose-leaf, spiral-bound, ring-bound, or otherwise prohibited reference formats are not allowed.

Test Information and Study Materials

Definitions, Theory, and Plans: Review Article 100 definitions, electrical theory, plan interpretation, voltage, current, resistance, power, and the relationships used in electrical calculations.

Services: Services are an important area on both examination portions. Study service calculations, service conductors, service equipment, disconnecting means, overcurrent protection, grounding and bonding, available fault current, and separately derived systems.

Feeders: Review feeder ampacity, feeder load calculations, overcurrent protection, grounded conductors, grounding and bonding, and conductor sizing.

Branch Circuits: Branch Circuit Conductors account for 11 items on the NEC Knowledge Portion. Review conductor sizing, continuous loads, overcurrent protection, voltage considerations, grounding, and specialized branch-circuit requirements.

Grounding and Bonding: Article 250 is essential for Master Electrician preparation. Study services, feeders, separately derived systems, grounding electrode conductors, equipment grounding conductors, bonding jumpers, and fault-current paths.

Wiring Methods: Review raceways, cables, boxes, enclosures, conductor fill, physical protection, wet locations, underground installations, and Chapter 3 requirements.

Electrical Equipment: Study equipment ratings, receptacles, switches, appliances, HVAC equipment, luminaires, working space, disconnect requirements, and general installation provisions.

Motors and Generators: Motors and generators are especially important in the Calculations Portion, where they account for six items. Review motor full-load currents, conductor sizing, overload protection, short-circuit and ground-fault protection, controllers, disconnects, generators, and related calculations.

Control Devices and Disconnecting Means: Study controllers, switches, contactors, disconnect ratings, locations, accessibility, grouping, and lockability.

Special Occupancies, Equipment, and Conditions: Review hazardous locations, healthcare-related installations, pools, marinas, emergency systems, standby systems, data and communications equipment, and other specialized NEC topics relevant to the examination outline.

Renewable Energy Technologies: Review photovoltaic systems, energy-storage-related code provisions where applicable, and electric vehicle charging equipment.

Service Calculations: These calculations deserve repeated practice. Candidates should understand demand factors, general lighting loads, receptacle loads, appliances, heating and cooling, motors, and other loads used to size services.

Feeder Calculations: Practice feeder load calculations and conductor sizing while applying the appropriate demand factors and NEC requirements.

Motor Calculations: Be comfortable using NEC motor tables rather than relying only on equipment nameplate values when the code requires table values. Practice conductor, overload, short-circuit protection, and feeder calculations involving multiple motors.

Raceway and Box Calculations: Review conductor fill, raceway fill, box fill, pull-box sizing, and conductor volume allowances.

Conductor Ampacity: Practice navigating Article 310 and applying temperature limitations, adjustment factors, correction factors, terminal temperature requirements, and conductor ampacity tables.

Code Navigation: Use the 2026 NEC while completing practice-oriented preparation. Train yourself to recognize the subject of a question before opening the code. This can reduce search time and improve consistency.

Separate Study for Each Portion: Treat NEC Knowledge and Calculations as distinct exam-preparation goals. The Knowledge Portion rewards broad familiarity with code requirements, while the Calculations Portion demands more time per question and stronger numerical application.

Time Management: The NEC Knowledge Portion provides 150 minutes for 75 total items, while the Calculations Portion provides 170 minutes for 33 total items. Candidates should practice under timed conditions so calculations do not consume excessive testing time.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Texas Master Electrician candidates organize preparation around the structure of the state licensing examination. The online exam-preparation format supports focused review of both the NEC Knowledge Portion and the Calculations Portion instead of treating the Master Electrician examination as a single undifferentiated test.

Trade-focused preparation helps candidates review services, feeders, branch circuits, grounding and bonding, wiring methods, electrical equipment, motors, generators, controls, special occupancies, renewable-energy technologies, and the calculations that connect these subjects.

Practice-oriented study is especially important at the Master Electrician level. Candidates need to interpret questions, identify the governing NEC subject, navigate to the applicable provision, and apply the code correctly within the available time.

Reference-navigation practice helps candidates build familiarity with the 2026 NEC. Regular use of the codebook during study can make frequently referenced articles and tables easier to locate during the open-book examination.

Calculation preparation supports service loads, feeders, branch circuits, conductors, motors, wiring methods, and equipment. Working through these problems repeatedly can help candidates develop a consistent approach to finding the correct NEC rule and completing the numerical work.

1 Exam Prep provides an organized study structure that helps candidates connect practical electrical experience with current code requirements. The goal is to support disciplined preparation, efficient reference use, trade-focused review, and stronger confidence with the exam format without guaranteeing a particular test score, license approval, or professional outcome.

Frequently Asked Questions

What does the Texas Master Electrical Contractor Online Exam Prep cover?

The preparation focuses on the subject areas included in the Texas Master Electrician NEC Knowledge and Calculations examination portions, including services, feeders, branch circuits, wiring methods, equipment, motors, generators, controls, special installations, renewable energy, and electrical calculations.

Which NEC edition is used for the current Texas Master Electrician exam?

The current examination references the National Electrical Code, NEC, 2026 Edition.

Is the Texas Master Electrician exam open book?

Yes. The examination is an open book test using the approved 2026 NEC reference.

How many portions are on the Master Electrician exam?

The examination has two separate portions: the NEC Knowledge Portion and the Calculations Portion.

How many items are on the NEC Knowledge Portion?

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

How many items are on the Calculations Portion?

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

What score is required to pass?

A minimum score of 70% is required on each examination portion.

Does extra time from one portion carry over to the next portion?

No. Time remaining from one examination portion does not transfer to the other portion.

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

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

Does Journeyman Industrial Electrician experience qualify toward the Master Electrician license?

No. Texas does not allow Journeyman Industrial Electrician experience to be used to qualify for the Master Electrician license.

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

No. The Master Electrician license is an individual credential. Texas Electrical Contractor licensing applies separately to the contracting business and includes additional business-license requirements.

Can I bring my NEC into the testing room?

Yes. Candidates may bring a compliant soft-bound 2026 NEC into the open-book examination. Loose-leaf, spiral-bound, and ring-bound copies are not permitted.

Can the NEC be highlighted or tabbed?

The NEC may contain permitted highlighting, underlining, and notes prepared before the examination. Permanent NEC publisher-manufactured index tabs are permitted under the testing rules.

How long should I allow for a tabbed and highlighted book package order?

Please allow up to 15 business days for tabbed and highlighted book package orders.

What should I focus on during final exam preparation?

Focus on services, feeders, branch circuits, grounding and bonding, conductor ampacity, wiring methods, equipment, motors, generators, controls, special installations, renewable-energy technologies, service and feeder calculations, motor calculations, and efficient navigation of the 2026 NEC.