Pass the C-10 electrical exam. On your first try.

A practice mode where the exam teaches you as you take it. You say how sure you are, you answer, and it tells you straight away why your answer was right or wrong — naming what the option you picked actually represents, not just revealing the correct one — with the code section behind it. Six-minute sessions, no timer, and it saves your place after every question. Five questions are free without an account.

Because a question you got right while guessing is not one you have learned, and counting it as learned is the mistake most study apps make. Tell it you were guessing and that question comes back later. Get it right twice while sure and it stops taking up your time.

The C-10 is the CSLB classification that lets you contract for electrical work in California. To get it you pass two exams — a Law & Business exam and the C-10 Trade exam — after meeting the experience requirements.

Yes. Every question and lesson is written to the 2025 California Electrical Code (based on the 2023 NEC) — the exact edition your exam is built on — with the specific code section behind each answer.

No. In this course CEC means the California Electrical Code, 2025 edition. It is the 2023 NEC as adopted by California, with the changes California made, so the section numbers match the NEC. Where California changed a rule, the lessons follow California.

1,202 practice questions across the five official C-10 Trade sections and five Law & Business study sections, each with a full explanation and the code section behind it, plus 59 lessons and full-length timed practice exams for both the Trade and Law & Business exams.

Yes — the whole platform is mobile-first, so you can study lessons, run quizzes, and take timed practice exams from any device.

Questions you miss are automatically resurfaced on a spaced-repetition schedule — sooner if you keep missing them, further out once they stick. Active recall plus spacing is how you actually memorize the material for exam day.

Both. The exam-prep modules get you the license. The After the License track covers what happens next, in phases, and every phase listed on this page is live now: what CSLB needs before the number issues, the two bonds, the workers compensation rule as the statute actually reads today, what the qualifier is legally responsible for, why renting a license is a crime, the entity decision and its California tax numbers, the EIN and the books, city business tax, the insurance stack a general contractor will demand, sales tax on materials versus fixtures, quarterly estimates, where the first ten jobs come from, the license number on every ad and the van, a flat-rate price book, estimating as a six-step method, and public works with DIR registration and prevailing wage, then contracts and getting paid: the home improvement contract with every B&P 7159 notice in the words of the statute, the $1,000 or 10% deposit cap, the $750 service and repair contract, subcontracts with general contractors, change orders, mechanics liens and the 20-day preliminary notice, the four lien release forms, stop payment notices, small claims and collections, and how to take payment, with three worked cases; then the field: one diagnostic method applied to every call, permits and inspections with the four exemptions the code names, the daily-use code with the actual numbers (box fill, ampacity, AFCI and GFCI locations, working clearance, grounding), load calculations three ways including the 7,200 volt-ampere EV floor, service upgrades and utility coordination, EV chargers and load management, solar and storage with Rule 21 and Net Billing, troubleshooting trees, aluminum wiring and knob-and-tube, the Title 24 lighting rules, generators and interlocks, C-10 versus C-7 scope, Cal/OSHA electrical safety and the IIPP and heat plan every employer owes, NM versus MC versus EMT, three-phase and motor circuits, and the EPA lead rule and asbestos survey, with seven worked cases; then customers, warranties and complaints: presenting options and price without apologizing, delivering bad news with the change order that goes with it, the four-year and ten-year windows at CSLB and in court, a warranty policy you can honor without losing money, the CSLB complaint process step by step with what becomes public and for how long, reviews and the two laws that govern them, and walking away from the wrong customer without abandoning the job, with two worked cases; then growing: why almost everyone you pay to pull wire is an employee and the one way a subcontractor is not, the state electrician certification your crew must carry and the $25 trainee route that makes a new hire lawful in a week, the payroll rules with the 2026 numbers (minimum wage, overtime, meals and rest, paydays, pay stubs, sick leave, final pay), the thirty-day sequence from workers compensation coverage to the new-hire report, adding a C-46, C-7 or B and the exam waiver, being a qualifier for someone else and what happens when a qualifier leaves, the records the law makes you keep and for how long, the three numbers that predict failure, and supply-house credit, the fleet and use tax on stock, with two worked cases; and finally staying licensed: the renewal every two years with its fees, the 90-day retroactive window and the five-year cliff, inactive status, the seven suspensions that take effect without a hearing and the document that lifts each, the changes you must report within 90 days and the five years the address of record outlives the license, the three-year code cycle and the January 1 law changes, with a worked case, plus printable templates for the setup checklist, insurance matrix, estimate worksheet, price book, 90-day marketing plan, home improvement contract, service and repair contract, change order, preliminary notice, the four lien releases, demand letters, subcontract review checklist, job-site checklist, pre-inspection checklist, load calculation worksheet, IIPP starter, heat illness prevention plan, customer options sheet, workmanship warranty statement, a written response to a CSLB complaint, hiring checklist, new-hire packet index, the three-number KPI sheet and the annual compliance calendar. All eight phases are live. When the law changes, the lesson changes, at no extra charge. Every lesson cites its .gov source and shows the month it was last checked.