Free practice · 2026 NEC
Master electrician practice test
The master electrician exam is not a harder journeyman exam: it is a different one, weighted toward services, transformers and motors. The free test below gives you ten calculation problems in 52 minutes, the pace of the Texas master calculations portion: 33 questions in 170 minutes.
About 1 in 5 candidates passes the calculations portion in Texas. Official TDLR results for fiscal year 2025: 20.56% on Journeyman calculations and 19.08% on Master calculations.
What the calculations portion covers
This is the content outline of the Texas master calculations portion, from the PSI Candidate Information Bulletin. Three of the 33 questions are unscored. Services with separately derived systems and motors together are 14 of the 30 scored questions, almost half the portion.
| Subject area | Scored questions |
|---|---|
| Calculations and Theory | 2 |
| Electrical Services, Service Equipment, and Separately Derived Systems | 8 |
| Electrical Feeders | 3 |
| Branch Circuit Calculations and Conductors | 4 |
| Electrical Wiring Methods and Electrical Materials | 2 |
| Electrical Equipment and Devices | 2 |
| Motors and Generators | 6 |
| Electrical Control Devices and Disconnecting Means | 1 |
| Special Occupancies, Equipment, and Conditions | 1 |
| Renewable Energy Technologies | 1 |
| Total | 30 |
Where master candidates lose points
- Transformer problems: mixing up the primary and the secondary, or leaving the 1.732 factor out of a three-phase calculation.
- Motor problems: sizing the protective device with the conductor percentage, or reading the nameplate instead of the table.
- Commercial load problems: applying a demand factor to the whole load instead of to each step.
Train on the full simulator
Full-length timed exams at the real format, unlimited practice with new numbers every time, drills on your weak subject areas, and study material: a four-week plan, exam-day strategy and the mistakes to avoid in each subject area.
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Common questions
How many questions are on the master electrician exam?
In Texas the master exam has two portions: NEC knowledge with 75 questions in 150 minutes, and calculations with 33 questions in 170 minutes. Each portion includes a few unscored questions.
What do I need before I can take the Texas master exam?
TDLR requires that you have held a journeyman electrician license for at least two years and that you show 12,000 hours of on-the-job training under a master electrician licensed in Texas.
How hard is the master calculations portion?
In fiscal year 2025, TDLR reported 3,946 attempts at the master calculations portion and a 19.08% pass rate.
Official sources
- PSI — Candidate Information Bulletin, TDLR Electricians
- TDLR — Apply for a Master Electrician License
- TDLR — Electrician Exam Statistics, Fiscal Year 2025
Facts checked against these sources on 2026-11-12.