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Texas Master Electrician – Calculations Portion Practice Exam

What's on This Practice Exam

The Texas Master Electrician Calculations exam is a focused, math-heavy assessment that tests your ability to apply the National Electrical Code and electrical theory to real-world calculation scenarios. The real exam consists of 33 questions with a 170-minute time limit and requires a 70% passing score to pass.

We offer two ways to practice:

• Free Practice Exam: Get started immediately with 10 questions per attempt, drawn from a limited question pool. There's no cost and no commitment — retake it as many times as you like to get comfortable with the question format, difficulty level, and subject matter before you invest in full prep.

• Full Practice Exam (Paid): This is your serious prep tool. It mirrors the real exam with 33 questions and a 170-minute time limit, drawn from a pool of 178+ practice questions. Every attempt pulls a unique set of questions, so you'll never see the exact same exam twice. All questions are built around the official topic breakdown provided by the Texas exam authority.

Topics Covered

The practice exam spans all ten official topic areas tested on the real exam:

• Calculations and Theory – Foundational electrical formulas, Ohm's Law applications, power calculations, and circuit theory concepts that underpin every other topic.
• Electrical Services, Service Equipment, and Separately Derived Systems – The largest topic on the exam, covering service entrance sizing, transformer-derived systems, grounding, and equipment ratings.
• Electrical Feeders – Feeder conductor sizing, demand factors, and load calculations for feeder circuits supplying multiple branch circuits or panels.
• Branch Circuit Calculations and Conductors – Sizing conductors and overcurrent protection for branch circuits, including ampacity, correction factors, and bundling adjustments.
• Electrical Wiring Methods and Electrical Materials – Code-compliant wiring methods, conduit fill, and appropriate material selection for various installation conditions.
• Electrical Equipment and Devices – Calculations related to outlets, receptacles, panelboards, and other utilization equipment.
• Motors and Generators – The second-largest topic, covering motor load calculations, FLA, service factor, overload protection sizing, and generator applications.
• Electrical Control Devices and Disconnecting Means – Sizing and placement of disconnects, control circuit requirements, and switching calculations.
• Special Occupancies, Equipment, and Conditions – Calculations specific to hazardous locations, healthcare facilities, or other NEC-defined special conditions.
• Renewable Energy Technologies – Solar PV system calculations, inverter sizing, and interconnection requirements under current NEC provisions.

How This Practice Exam Helps

Passing a calculations exam isn't about memorization — it's about fluency. Working through realistic, NEC-based problems under timed conditions is the most effective way to build the speed and accuracy you need on exam day.

The full practice exam includes a timed mode that replicates the pressure of the real 170-minute window, helping you learn to pace yourself across 33 questions. After each attempt, you receive a score breakdown by topic, so you can immediately identify whether Motors and Generators or Electrical Services is your weak spot — and focus your study time accordingly.

Because the full exam draws from a pool of 178+ unique questions, retaking it multiple times gives you genuinely varied practice rather than repeated exposure to the same problems. Every attempt reflects the official topic weightings, so your preparation stays aligned with what the real exam actually tests.

Exam Quick Facts

Start with the free practice exam to get a feel for the question style — no sign-up hassle, no pressure. When you're ready to prep in earnest, upgrade to the full practice exam and start building the calculation confidence that earns your Master Electrician license in 2026.