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Free electrician exam prep
Flashcards, code-article drills, load calculations and theory for the 2023 NEC, with the math and the code reference behind every answer. No sign-up. Paid CE courses open as each state approves them.
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VoltCE is built by a Wisconsin master electrician. Every donation pays for hosting and new free questions, so more apprentices and journeymen can study for their exam without buying an expensive prep course.
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Continuing education for licensed electricians. Paid courses open once the state approves them. The OSHA course is free to study now.
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Practice quizzes
Short ten-question quizzes by section, with a score and an explanation for every answer. Practice only: separate from any course exam, and no CE credit.
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Free electrician exam prep
Flashcards and practice questions on the 2023 NEC, grounding and bonding, Wisconsin code changes and electrical safety. Free, no account needed.
Study practice written by VoltCE. These are not official exam questions and do not earn continuing-education credit. Always check the code book and your state licensing board for what applies to you.
Load calc & sizing practice
Thousands of free practice problems: conductor sizing, branch circuits, dwelling and commercial loads, motors, transformers with secondary protection, parallel conductors, conduit fill (several conduit types and insulations), voltage drop, grounding and box fill. Every answer comes with the worked solution.
Based on the 2023 NEC. Unless a problem says otherwise, assume 75°C-rated terminations, copper conductors and standard overcurrent device sizes from 240.6(A). Study practice written by VoltCE, not official exam questions, and no CE credit. Have your code book handy.
Master electrician exam prep
Free, and built for the harder exam: multi-step design calculations, services and feeders, motors, transformers, short-circuit current, hazardous locations and Wisconsin practice. Every answer shows the worked solution and the code reference.
Based on the 2023 NEC, with 75°C terminations, copper conductors and standard sizes from 240.6(A) unless a problem says otherwise. Study practice written by VoltCE, not official exam questions, and no CE credit. Have your code book and calculator ready. See a wrong answer? Use Report this question; corrections help most.
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Master-level problems
Advanced calculations, by chapter
Advanced code and design questions, by chapter
Practice by code cycle
States adopt different editions of the NEC. Pick your exam level and the code cycle you are being tested on, then study only questions that are correct for that edition. A separate mode drills what changed when each cycle arrived.
Each question is tagged with the editions where its answer holds true, so a rule that changed is never marked wrong for the older cycle. Always confirm which edition your state and exam use. Study practice written by VoltCE, not official exam questions, and no CE credit.
Exam level
Code cycle
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Wisconsin electrician exam prep
Free practice for the Wisconsin journeyman and master electrician exams: code-article questions, load and sizing calculations with worked solutions, and electrical theory, all written for the 2023 NEC.
Wisconsin's updated electrical code, based on the 2023 NEC, took effect September 1, 2026, and the Department of Safety and Professional Services said it expected its licensing exams to be updated by October 1, 2026. This bank only includes questions that are correct under the 2023 NEC. Study practice written by VoltCE, not official exam questions. The exam is open book, so have your 2023 code book handy, and confirm the current exam outline with DSPS before you test. The Wisconsin rules questions are checked against the adopted text of SPS 316 (Register September 2026), SPS 305 and Wis. Stat. chs. 101 and 182.0175. Fees, dates and rules change, so check the current rule before you rely on a detail.
Practice by topic
Florida Unlimited Electrical Contractor exam prep
Free practice for both parts of the Florida DBPR exam: the 50-question Business part and the 100-question Technical/Safety part. Each topic below lists how many questions the state puts on the exam, so you can spend your time where the points are.
Written by VoltCE from public sources (Florida Statutes and rules, IRS, Department of Labor, OSHA, ADA and the NEC), not official exam questions. The exam is open book and uses the 2023 NEC until August 21, 2027, then the 2026 NEC. Confirm the current exam outline and reference list with the Florida DBPR before you test. Questions marked "concept check" were written from widely documented provisions of paid code books and not checked line by line against them.
Business part (50 questions on the exam)
Technical/Safety part (100 questions on the exam)
Code article study
Study one NEC article at a time, or mix them all. Classified locations, health care, EV charging, solar, pools, special occupancies and more. . Study practice written by VoltCE for the 2023 NEC; check every answer against your code book.
Free study tools
Everything here is free. Practice written by VoltCE for the 2023 NEC, with an explanation, a reference and the math behind every answer. Not official exam questions, no CE credit.
Flashcards
Memorize the code: major articles (tier 1), all other articles (tier 2), formulas (tier 3).
Article names: memorize the code book
250 is Grounding and Bonding, 240 is Overcurrent Protection. Flashcards and a quiz, major 25 articles or all of them.
Code article study
Pick one article and zip through questions, or randomize across articles. Timer optional.
Index lookup drill
Practice finding answers in the code book: pick the index keyword, then pick the section.
Practice by code cycle
2017, 2020, 2023 or 2026 NEC: questions that are correct for your edition, journeyman or master level, plus what changed.
Master electrician prep
Harder multi-step calculations and design questions for the master exam, with worked solutions.
Load calc and sizing
Thousands of problems: services, motors, conductors, conduit fill, transformers.
Electrical theory and formulas
Ohm's law, power, AC, three-phase, transformers, motors, with full worked math.
Edition changes (2017, 2020, 2023, 2026)
Review what changed between NEC editions, article by article. Cards and quiz.
Safety, grounding and NEC 2023 changes
Flashcards and quizzes on OSHA, grounding and bonding, and the 2023 updates.
Code flashcards
Memorization cards in three levels. Randomized mix shuffles every card. Code section cards cover the code book article by article: start with the 25 major articles, then add all the rest. Formula cards cover the math. Tap a card to flip it.
Flashcards
Code book index lookup drill
Open the index at the back of your NEC, find the entry word, then turn to the right section. Step 1: pick the keyword you would look up. Step 2: pick the section you would turn to. You will be told if you are right and how to find it next time.
Electrical theory and formula practice
Ohm's law, power, AC theory, three-phase, transformers, motors and more. Wrong answers show the formula, the math step by step and how to solve it yourself next time.
Edition changes: what moved between NEC editions
States adopt different editions. Pick the edition you know and the edition you are studying, then review what changed, article by article, as flashcards or a quiz. Steps are chained: 2017 to 2023 shows the 2017-to-2020 and the 2020-to-2023 changes.
Fromto
Summaries written by VoltCE from public change summaries. Always confirm in the actual code book for your edition and check your state's adopted edition and amendments.
Suggestion box
Tell us what to build next, or report a wrong answer. Corrections help most: include the question and what you think is right, with the code section if you have it.
We do not publish what you send. We use anonymous usage counts (pages and study tools used, no names) to make the site easier to use.
Help keep the free study tools free
VoltCE is built by a Wisconsin master electrician. Free exam prep costs real money to build and host. If it helped you, a small contribution keeps it going and pays for new free material.
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Other ways to help
Share the free prep with someone studying for their exam, and tell us which topics you want next.