About the exam
Master Electrician Exam structure
Master Electrician Test Prep with 601 original practice questions, flashcards, weighted mocks, and safety-focused recovery drills.
Issuer and path
Master Electrician Test Prep is administered through State licensing agencies / PSI / NEC-based electrical licensing programs. Check official resources before booking, retesting, or relying on a stale requirement.
Definitions, Calculations, Theory and Plans
9 scored + 0 pretest
NEC definitions, plan reading, electrical theory, Ohm's law, power formulas, calculated load setup, service demand concepts, and open-book reference navigation.
Services, Service Equipment and Separately Derived Systems
19 scored + 0 pretest
Service load calculations, service conductors, service equipment, disconnects, grounding electrodes, bonding jumpers, transformers, separately derived systems, and fault-current suitability.
Electrical Feeders
10 scored + 0 pretest
Feeder calculated loads, conductor ampacity, overcurrent protection, neutral calculations, equipment grounding conductors, panel ratings, and feeder tap conditions.
Branch Circuit Calculations and Conductors
15 scored + 0 pretest
Branch-circuit load calculations, conductor sizing, continuous loads, receptacle and lighting loads, GFCI/AFCI concepts, neutral rules, and conductor identification.
Electrical Wiring Methods and Materials
9 scored + 0 pretest
Raceways, cables, boxes, conduit fill, box fill, support, securing, wet locations, fittings, protection from damage, and code-compliant workmanship.
Electrical Equipment and Devices
9 scored + 0 pretest
Panelboards, switchboards, luminaires, receptacles, appliances, HVAC equipment, disconnects, working space, equipment ratings, and listed-use instructions.
Motors and Generators
13 scored + 0 pretest
Motor full-load current tables, conductor sizing, overload protection, short-circuit protection, controllers, disconnects, multiple motors, generators, and transfer equipment.
Control Devices and Disconnecting Means
4 scored + 0 pretest
Disconnect location, lockability, control circuits, switches, contactors, emergency shutoff, source identification, and safe isolation.
Special Occupancies, Equipment and Conditions
8 scored + 0 pretest
Hazardous locations, health care, pools and spas, emergency systems, optional standby systems, temporary wiring, RVs, mobile homes, marinas, and fire-pump reliability.
Renewable Energy Technologies
4 scored + 0 pretest
Photovoltaic source circuits, rapid shutdown, energy storage, electric vehicle charging, disconnects, labeling, grounding, bonding, and utility interconnection.
Before testing
Verify the current candidate bulletin, approved reference materials, calculator rules, identification requirements, and whether your licensing jurisdiction uses the same master electrician outline.
Official Outline Coverage Map
Coverage is mapped to official outline item counts so content depth can be checked without hard-coding a single exam.
| Topic | Official outline items | Your questions | Your flashcards | Confidence |
|---|---|---|---|---|
| Definitions, Calculations, Theory and Plan Reading | 9 | 54 | 10 | Priority |
| Services, Service Equipment and Separately Derived Systems | 19 | 115 | 10 | Priority |
| Electrical Feeders | 10 | 60 | 10 | Good |
| Branch Circuit Calculations and Conductors | 15 | 90 | 10 | Priority |
| Wiring Methods, Raceways, Boxes and Materials | 9 | 54 | 10 | Priority |
| Electrical Equipment and Devices | 9 | 54 | 10 | Priority |
| Motors and Generators | 13 | 78 | 10 | Strong |
| Control Devices and Disconnecting Means | 4 | 24 | 10 | Good |
| Special Occupancies, Equipment and Conditions | 8 | 48 | 10 | Priority |
| Renewable Energy Technologies | 4 | 24 | 10 | Good |
How to use this guide
How to study Master Electrician
Treat each question like a code-book workflow: identify the installation, choose the controlling NEC article or table, verify load and conductor math, confirm grounding and bonding, and reject any answer that ignores ratings, access, protection, or special-occupancy rules.
1. Locate the code source
Identify the article, table, exception, note, and definition that controls the fact pattern.
2. Set up the calculation
Write the load, conductor, overcurrent, demand, and adjustment steps before choosing an answer.
3. Check equipment suitability
Confirm ratings, listing, working space, interrupting capacity, environment, and nameplate limits.
4. Preserve the safety path
Verify grounding, bonding, disconnecting means, GFCI/AFCI protection, and fault-current paths.
Definitions, Calculations, Theory and Plan Reading
Theory questions test NEC terms, electrical quantities, plan symbols, circuit relationships, reference navigation, and basic calculation setup.
Key rules
Rule 1
Definitions, Calculations, Theory and Plan Reading questions reward the answer that follows the official rule source, safety duty, and practical work sequence.
Exam cue: Identify the system, hazard, tool, code rule, or licensing duty being tested.
Rule 2
The strongest answer controls the hazard before continuing work, testing equipment, or documenting completion.
Exam cue: Check inspection, isolation, measurement, documentation, and environmental requirements.
Rule 3
Eliminate answers that ignore inspection, code clearance, environmental controls, lockout, labeling, or qualification limits.
Exam cue: Choose the safe compliant answer before the fastest production answer.
Common traps
Treating local, state, and federal rules as interchangeable.
Prevention: Avoid answers that skip inspection, ignore the code source, energize unsafe equipment, vent regulated material, or treat local rules as optional.
Skipping required inspection, isolation, documentation, or recovery steps.
Prevention: Avoid answers that skip inspection, ignore the code source, energize unsafe equipment, vent regulated material, or treat local rules as optional.
Choosing a convenient answer that exceeds the worker's qualification or equipment rating.
Prevention: Avoid answers that skip inspection, ignore the code source, energize unsafe equipment, vent regulated material, or treat local rules as optional.
Memory anchors
Defined Term
Use the NEC definition before relying on field slang or habit.
Voltage Current Resistance
Ohm's law connects voltage, current, and resistance in basic circuit calculations.
Power Formula
Watts relate to volts and amperes and help estimate load and circuit demand.
Plan Symbol
Plan symbols must be interpreted with the legend, specifications, and applicable code rule.
Copper Assumption
When an outline says otherwise is not noted, conductor calculations may assume copper.
Continuous Load
A continuous load is expected to run for three hours or more and can change sizing decisions.
Code Navigation
Find the article, table, exception, and notes before choosing a code answer.
Demand Factor
A demand factor reduces calculated load only when the NEC rule allows it.
Grounded Versus Grounding
Grounded conductors and equipment grounding conductors serve different purposes.
Plan Conflict
When a plan note conflicts with code minimums, the safer code-compliant requirement controls.
Next best moves
Quick check-up
Use a short quiz to confirm the rule pattern is actually sticking.
Check-up Questions
The inspector identified in the contract documents has final responsibility for interpreting whether the installation complies with the adopted electrical code. Which NEC term describes this role?
A disconnect is described as accessible as applied to equipment. What condition must be met?
Answer all questions to submit.
Next step personalized recommendations
Open another topic next
Official resources
Verify the details with the official sources
Use these links for eligibility, scheduling, handbook rules, and issuer updates. Our guide helps you study; official sources tell you what the testing partner currently requires.
TDLR Electrician Exam Information
Official Texas electrician exam overview, vendor information, and code-reference guidance.
TDLR/PSI Electrician Candidate Information Bulletin
Public PSI bulletin with master electrician NEC Knowledge and Calculations outlines.
PSI TDLR Test Takers
PSI scheduling and candidate information landing page for TDLR exams.
NFPA 70 National Electrical Code
NFPA page for the National Electrical Code standard referenced by the exam program.
FAQ
Common Master Electrician questions
Is the master electrician exam open book?
Public TDLR/PSI guidance describes electrician exams as open book with approved NEC references, so practice should focus on locating and applying the rule, not memorizing every table.
Why does this mock use 100 questions?
The public master electrician outline separates NEC Knowledge and Calculations. This mock combines their scored topic weights into one 100-question practice set.
What should I study first?
Start with services, branch circuits, motors, feeders, wiring methods, and calculation workflow because those areas carry most of the combined master outline weight.
Does this replace the NEC code book?
No. It is a practice layer for code navigation, calculations, and scenario judgment. Candidates should still study with the current approved code reference and candidate bulletin.