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California C-10 Electrical Contractor License Examination
600 questions
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About this exam
The California C-10 Electrical Contractor License Examination is part of the California Contractors State License Board (CSLB) licensing process for applicants seeking to contract for electrical work. The qualifying individual generally must document at least four years of qualifying experience in the classification, subject to CSLB rules. Most applicants take both the C-10 trade examination and the Law and Business examination, although exemptions or waivers may apply in some cases. Review current CSLB application instructions for eligibility requirements, exam arrangements, and any exceptions that may affect your application.
The C-10 trade exam covers practical knowledge used to plan and perform electrical contracting work. Study areas include reading electrical plans, estimating labor and materials, jobsite safety, and installing raceways, conduit, conductors, and cable, along with other electrical systems and equipment. The CSLB’s current C-10 study materials are the best guide to the tested scope. Prepare by reviewing topics systematically, practicing under timed conditions, and studying why answers are correct—not just memorizing them. Allow separate study time for the Law and Business examination.
How to prepare for the California C-10 exam
- Use the current CSLB C-10 examination study materials to organize your review, and confirm exam and application details directly with the CSLB.
- Review electrical plans and blueprint reading, jobsite safety, material takeoffs and estimating, and raceway, conduit, and cable installation; connect each topic to the decisions made on an actual job.
- Build timed multiple-choice study sessions and review every missed or guessed answer, while preparing separately for the Law and Business examination if it applies to you.
FAQ
Who needs to take the California C-10 Electrical Contractor License Examination?
Applicants seeking a California C-10 Electrical Contractor license generally need a qualifying individual who meets CSLB experience requirements and passes the required examinations. Most applicants take the C-10 trade exam and the Law and Business exam. CSLB rules may allow an exemption or waiver in certain circumstances, so check the current application instructions.
What is the format of the C-10 electrical contractor exam?
The CSLB contractor examinations are administered as computer-based tests with multiple-choice questions. The licensing process generally includes a trade examination and a separate Law and Business examination unless an exemption or waiver applies. Check your CSLB exam notice and current official guidance for the details that apply to your testing appointment.
What subjects should I study for the California C-10 exam?
Focus on the topics in the current CSLB C-10 study materials, including electrical plans, jobsite safety, estimating and material takeoffs, and electrical installation methods such as raceways, conduit, and cable. Practice applying concepts to work situations and review explanations for missed questions. Prepare for Law and Business separately if you must take that examination.