Free Electrician Practice Test
310 original practice questions across 20 topics, each marked the moment you answer it, with the reasoning and the source behind it.
310 questions · free · no sign-up
- Instant feedback and a worked solution on every question
- Timed exam simulations built to published outlines
- No account, no sign-up, progress saved in your browser
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Practice exams and question banks
Timed simulations built to published content outlines, plus the full searchable question bank.
- Journeyman electrician practice testTimed simulation built to the Texas journeyman content outline, in its two scored portions.
- Master electrician practice testThe heavier calculation and load-calculation weighting of the master-level outline.
- Electrical contractor practice test100 questions in 6 hours, matching the North Carolina contractor exam format.
- NEC practice testCode navigation, definitions, GFCI and AFCI, working space and receptacle rules.
- Electrical calculations practiceNumeric-entry exercises with tolerances and step-by-step solutions.
- Electrician exam questionsBrowse the whole question bank by topic, difficulty and source.
Practice a specific topic
Each topic page explains the concept, gives you the formulas, and then puts you straight into exercises on it.
- Electrical TheoryConductors and insulators, AC and DC, frequency, power factor, and the behaviour that every other calculation rests on.20 practice questions
- Ohm's LawSolve for voltage, current, resistance and power from any two known values, the way you will on the exam.18 practice questions
- Series and Parallel CircuitsTotal resistance, current division, voltage division, and why a parallel branch lowers total resistance.16 practice questions
- Electrical CalculationsThe arithmetic the calculations portion is built on: percentages, three-phase factors, kVA and unit conversion.14 practice questions
- Wire Sizing and AmpacityAmpacity tables, termination temperature limits, ambient correction and conductor-count adjustment.20 practice questions
- Conduit FillFill percentages, conductor areas and picking the smallest trade size that complies.12 practice questions
- Voltage DropThe circular-mil method, single-phase versus three-phase, and the 3% and 5% recommendations.14 practice questions
- Load CalculationsDwelling and commercial service loads, demand factors, range demand and the optional method.20 practice questions
- Grounding and BondingGrounding electrode conductors, equipment grounding conductors, electrodes and the effective fault path.18 practice questions
- TransformersTurns ratios, full-load current, kVA sizing and the difference between wye and delta secondaries.14 practice questions
- Motors and Motor ControlsTable full-load current versus nameplate, conductor sizing, overload protection and control circuits.18 practice questions
- Electrical SafetyOSHA Subpart S: lockout/tagout, approach distances, working space, GFCI and qualified-person rules.20 practice questions
- NEC RequirementsDefinitions, GFCI and AFCI, receptacle spacing, working space and how to navigate the Code quickly.18 practice questions
- Electrical Diagrams and SymbolsRead symbols, one-lines and ladder logic, and tell a series circuit from a parallel one at a glance.12 practice questions
What is on an electrician licensing exam?
Electrician licensing exams are open-book code exams built around a published content outline, and most of the marks sit in conductor sizing, overcurrent protection, load calculations and wiring methods. The exam is less about memorising the Code than about finding things in it quickly and applying a handful of rules accurately under time pressure.
Formats differ by jurisdiction, and the difference changes how you prepare: Texas splits its journeyman and master exams into two separately scored portions, North Carolina runs one 100-question paper. The table below has the verified figures.
What they share is open book and a pass mark around 70 percent. Open book misleads people — under two minutes a question means you confirm with the book, you do not research in it.
Exam formats we have verified
Every figure in this table comes from the licensing authority's own published material. Where an authority does not publish a figure, we say so rather than estimating it.
| Exam | Questions | Time | Pass |
|---|---|---|---|
| Texas Journeyman — NEC Knowledge | 56 scored | 130 min | 70% |
| Texas Journeyman — Calculations | 24 scored | 110 min | 70% |
| Texas Master — NEC Knowledge | 70 scored | 150 min | 70% |
| Texas Master — Calculations | 30 scored | 170 min | 70% |
| North Carolina Limited / Intermediate / Unlimited | 100 | 6 hours | 70 |
| National Standard Journeyman (outline OL-17) | 80 | 4 hours | Not published |
Sources: the TDLR electrician examination page and its PSI candidate information bulletin; the North Carolina Board of Examiners of Electrical Contractors; and the National Standard outline pages reproduced by BGR Technical Publications. Texas also requires no examination at all for an electrical contractor licence — a contractor designates a Master Electrician of Record instead.
Four kinds of exercise
Reading about the Code is not practising it. Each format trains something the others cannot.
Multiple choice
187 questionsThe exam format. Distractors are the mistakes candidates actually make — the adjacent table row, the wrong multiplier, nameplate where the table value was wanted.
Calculations
99 exercisesYou type the number instead of picking it, so there is no working backwards from four options. Stated tolerance, step-by-step solution.
Diagrams
12 exercisesOriginal circuits, a three-wire control ladder, a service one-line and a symbol sheet. You read the drawing to answer.
Troubleshooting
12 scenariosMeter readings and a fault to find. The solution walks the reasoning, because the reasoning is what transfers to the next fault.
A study plan for an open-book exam
Open book is not the same as easy: under two minutes per question leaves time to look up a handful of answers, not most of them.
- 1Check which code edition your exam usesThe candidate bulletin also gives the question count, time limit and what you may bring in.
- 2Drill the arithmetic until it is automaticThe 125% multiplier, standard device ratings, the square root of 3, ampacity from 14 AWG to 4/0.
- 3Tab your code book and practise turning to itLoad calculations, ampacity, motor tables, Chapter 9. Check your jurisdiction’s binding rules first.
- 4Work topic drills past 80% accuracyImmediate feedback builds accuracy. Missed questions come back to you automatically.
- 5Switch to timed exams for pacingAccuracy without pacing still fails. Flag what is slow and move on, as you must on the day.
- 6Let the topic breakdown pick your next studyStudy the weakest topic, not the most interesting one.
Common mistakes that cost marks
| The mistake | What is actually true |
|---|---|
| Nameplate current for motor conductors | Conductors and the short-circuit device come from the table; only the overload uses nameplate. |
| Forgetting the square root of 3 | Omitting 1.732 gives an answer 42% low — and it is usually one of the options. |
| 125% applied to the whole load | Only the continuous part. Noncontinuous is added at 100%. |
| Using the 90 °C column for the answer | Terminations cap it: 60 °C at 100 A or less, 75 °C above. |
| Ampacity treated as the circuit rating | 12 AWG copper is good for 30 A but limited to a 20 A device. |
| Applying an exception nobody asked for | Texas says assume copper, and ignore exceptions and optional methods unless told. |
Frequently asked questions
Is this electrician practice test free?
Yes. Every question, explanation and practice exam on this site is free, with no account and no sign-up. Your progress is saved in your own browser so you can come back and pick up where you left off.
How many practice questions are there?
There are 310 original questions across 20 topics, including multiple-choice questions, numeric calculation exercises, diagram reading exercises and troubleshooting scenarios. All of them are written from published sources and every numeric answer is checked by an automated script.
Are these the real questions from the electrician exam?
No, and you should be sceptical of any site that claims otherwise. These are original questions written to match the published content outlines from licensing authorities. Real examination items are confidential and copyrighted. Practising original questions on the same subject matter is how you prepare; memorising leaked items is not.
Which edition of the NEC do the code questions use?
Code questions are written to the 2017 National Electrical Code, which is the most recent edition available as a citable public document. Texas examinations have referenced the 2026 NEC since 1 September 2026 and North Carolina publishes the 2020 NEC for its exams, so check your own licensing authority bulletin and verify anything you intend to rely on against that edition.
What is the best way to use these practice tests?
Start with topic drills to build accuracy with immediate feedback and full explanations, then move to the timed exam simulations to practise pacing. Use the topic performance breakdown after each exam to decide what to study next, and use the retry queue to come back to the questions you missed.
Do I need to create an account to track my progress?
No. Progress is stored in your browser using local storage, so nothing leaves your device and no account is needed. Clearing your browser data or using a different browser or device will start you fresh.
How are the calculation exercises graded?
You type a numeric answer and it is graded against a stated tolerance, which is shown beneath the input. Common formats are accepted, including thousands separators and fractions, and a unit you type is checked against the expected unit rather than being rejected outright.
What topics does the electrician exam cover?
Published outlines are organised around electrical theory and definitions, services and service equipment, feeders, branch circuits and conductors, wiring methods and materials, equipment and devices, motors and generators, control devices and disconnecting means, special occupancies, and renewable energy technologies. Calculations are weighted heavily, which is why the Texas journeyman and master exams now have a separately scored calculations portion.
Calculators to check your working
Once you understand the method, these free calculators let you verify a result quickly — useful when you are working through practice problems on paper.