Electrician Exam Prep
Free Electrician Exam Practice, Built on Verified NEC Data
Prep for the Journeyman and Master Electrician exams in three parts: unlimited practice on the calculation topics, a map of which exam areas you can drill here, and a guide to how your state runs its exam. Every problem is generated with fresh values, so you practice the method instead of memorizing an answer key.
- 1 Practice by topicVoltage drop, Ohm's Law, conduit fill, box fill
- 2 See what the exam coversWhich areas you can drill here, and which not yet
- 3 Know your state's examTexas, California, and Florida, fully cited
- No account or email
- Unlimited problems
- Worked solutions
Sample practice problem · Conduit Fill
You are pulling 6 conductors of 10 AWG THHN into EMT conduit. What is the minimum trade size allowed?
1 · Practice by topic
Four calculation topics, unlimited problems in each
Each topic page is a practice session, not just a calculator. A problem is waiting when it opens: a circuit, a raceway, or a box with values drawn fresh for you. Work it the way you would on the exam and enter your answer. It is checked on the spot, within a small tolerance, so rounding at a different step won't mark a correct method wrong. If you're stuck, the worked solution shows every step with your numbers: which table, which value, which formula. Then ask for a new problem and go again. Each page also works one example fully by hand and answers the questions candidates most often get wrong on that topic.
Voltage Drop
Single- and three-phase circuits at 120 to 480 V, in copper or aluminum from 14 AWG up to 500 kcmil, over runs of 10 to 300 feet. Find the drop in volts; the worked solution then converts it to a percentage and checks it against the 3% branch-circuit recommendation.
Practice voltage drop → V = I × R · P = V × IOhm's Law
A fresh circuit every time with one value missing: voltage, current, resistance, or power. Simple on paper, but it sits under almost every other calculation on the exam, so it is worth drilling until choosing the right form of the formula takes no thought at all.
Practice Ohm's Law → NEC Ch. 9 Tables 1, 4 & 5Conduit Fill
Two to eight THHN conductors headed into EMT, PVC Schedule 40, or rigid metal conduit. Total the insulated conductor area, apply the fill limit for that number of wires, and pick the smallest trade size that still clears it.
Practice conduit fill → NEC 314.16(B)Box Fill
A device box with 14, 12, or 10 AWG conductors, and sometimes device yokes, an internal clamp, and grounding conductors. Count each item the way 314.16(B) does and find the minimum box volume in cubic inches, then see which standard boxes would pass.
Practice box fill →Next in the works: dwelling-unit load calculations under NEC Article 220. The reference tables are already verified; the practice page isn't built yet. See what's verified →
2 · What the exam covers
What's on the Journeyman and Master exam, and what you can drill here
Exact format, question count, and passing score vary by state and exam vendor, but most state exams draw from the same core of NEC-based skills. The practice topics above target the calculation side of that core. On the Texas Journeyman exam, for example, that is the separately timed 26-item Calculations portion, which has to be passed on its own at 70%. The other 59 items sit in the NEC Knowledge portion, which this hub doesn't drill yet. Here is where each core area stands.
| Exam area | Practice here |
|---|---|
| Ohm's Law, power, and basic circuit theory | Live Ohm's Law |
| Voltage drop on branch circuits and feeders | Live Voltage Drop |
| Conduit, raceway, and box fill | Live Conduit Fill · Box Fill |
| Motor and load calculations | In progress Article 220 dwelling-load and motor full-load current tables are verified; the practice pages are next. |
| Wiring methods, overcurrent protection, and conductor sizing | Not yet The Table 310.16 ampacity data behind it is verified; no practice page yet. |
| Grounding and bonding | Not yet Grounding conductor sizes (Tables 250.66 and 250.122) are verified; no practice page yet. |
3 · Your state's exam
The same trade, three very different exams
The skills carry over from state to state; the exam around them doesn't. Who runs it, how many questions it has, the passing score, and whether you bring your own code book all change at the state line. Texas lets you bring a tabbed NEC, while California puts the code on screen and bans your own copy. Florida's contractor exam sets the bar at 75%, not 70%. Each state guide cites every one of these facts to the licensing board or exam vendor, with the date it was retrieved.
Texas · California · Florida, verified and cited
Texas TDLR · PSI
Texas guide →- Journeyman: 85 items in two separately timed portions
- 70% to pass each portion
- Open-book; 2026 NEC from September 1, 2026
California DIR/DLSE · CPS HR
California guide →- General Electrician: 100 questions in 4 hours 30 minutes
- 70% to pass, for every certification type
- 2023 NEC provided on screen; no personal copies allowed
Florida DBPR/ECLB · Pearson VUE
Florida guide →- Contractor exam: 50-question Business + 100-question Technical/Safety
- 75% to pass each part
- Open-book; 2023 NEC until the 2026 NEC on August 21, 2027
New York and Pennsylvania license electricians locally rather than statewide, so they're not covered until each local authority can be checked individually. All state guides →
Built on verified reference data
We treat the numbers behind these practice problems like they matter, because on a licensing exam, they do.
- Every table cross-checked against at least one independent published source
- Full transparency on exactly where each number came from
- No copyrighted NEC text hosted — only the underlying factual tables, same as any code-reference tool
- Edition changes tracked (e.g. table renumbering) so figures stay correct
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