Texas Master Electrician Exam: What Changes from Journeyman, and How to Prepare

What the master license is

In Texas the master electrician sits one tier above journeyman. A master can do electrical work for the public independently, pull permits, and supervise journeymen and apprentices. You do not test for master cold. You hold a journeyman license first, put in the additional field experience TDLR requires, and then sit a harder, broader exam. Confirm the exact experience requirement with TDLR, since the hours are theirs to set.

How the exam is different from journeyman

The format does not change much. It is still an open-book, NEC-based exam, and the deciding skill is still fast and accurate navigation under a clock. What changes is scope and weight.

• Broader code coverage. The master exam pulls from more of the NEC, not just the installation-heavy articles that dominate the journeyman test.
• Heavier calculations. Larger service and feeder sizing, dwelling and commercial load calculations, and the multi-step problems a master is responsible for in the field.
• Less room to lean on one strong area. A wide exam punishes a narrow candidate. You cannot carry a weak calculation score with a strong installation score the way some journeymen do.

The practical takeaway: the calculation topics that fail journeyman candidates are the same ones that decide the master exam, only weighted more. If branch-circuit sizing, motor conductors, derating, and load calculations were shaky on your journeyman prep, those are exactly where the master exam will find you.

The high-yield topics to drill

These are the calculation patterns that carry the most weight. Each links to a worked, NEC-cited breakdown.

• Branch-circuit conductor sizing and the 125% continuous-load rule (NEC 210.19 / 210.20).
• Motor branch-circuit conductor sizing from the full-load-current tables, not the nameplate (NEC 430.22).
• Conductor ampacity derating for ambient temperature and bundling (NEC 310.15).
• Dwelling unit load calculations, standard and optional methods (NEC Article 220).
• Fast, accurate code navigation, because every one of the above is an open-book lookup under the clock.

How to prepare

Do not start by grinding master-only material. Start by closing your journeyman calculation gaps, because the master exam is built on the same foundation, only wider. Drill the high-yield patterns above until naming the problem type and picking the right table is automatic. Then widen out to the broader code coverage the master adds.

The fastest way to spend your study time well is to find out where you are actually bleeding points before you study. A short diagnostic scores your calculation areas separately and shows you which ones to fix first, instead of re-reading what you already know.