What Does a C-10 Electrical Contractor License Cover?
The C-10 Electrical classification is one of the most in-demand contractor licenses in California. From residential wiring to commercial installations to the booming solar and EV charging market, licensed electricians are essential to nearly every construction project. If you are considering a career as a licensed electrical contractor in California, this comprehensive guide covers everything you need to know about requirements, exams, salary potential, and building a successful business in 2026.
Scope of Work: What C-10 Licensees Can Do
The C-10 Electrical contractor classification authorizes you to perform work involving:
- Electrical wiring and systems: Installation, alteration, and repair of all electrical wiring, connections, and fixtures
- Power distribution: Main service panels, subpanels, transformers, and distribution systems
- Lighting systems: Interior and exterior lighting design and installation, including LED retrofits
- Low-voltage systems: Fire alarms, security systems, data cabling, and communication wiring
- Motor controls: Installation and wiring of motors, starters, and variable frequency drives
- EV charging stations: One of the fastest-growing segments — Level 2 and DC fast charger installations
- Solar electrical: Electrical connections for photovoltaic systems (note: full solar installation requires C-46)
- Generator installations: Backup power systems, transfer switches, and standby generators
The C-10 classification does not cover work that falls under other specialty classifications, such as C-7 (Low Voltage Systems — certain specific systems), C-46 (Solar), or C-45 (Electrical Sign).
Experience Requirements: 4 Years of Journeyman-Level Work
To qualify for the C-10 license, you must demonstrate at least four years of journeyman-level experience as an electrician. Here is what counts:
- W-2 employment: Working as a journeyman electrician for a licensed C-10 contractor — this is the most straightforward path
- Union apprenticeship: Completing an IBEW or other recognized electrical apprenticeship program (typically 4-5 years)
- Technical education: Up to 3 years of relevant education can substitute for experience (but at least 1 year of practical experience is required)
- Out-of-state experience: Equivalent experience from other states qualifies, but must be verified
- Military electrical training: Military experience in electrical work can count toward the requirement
Documenting Your Experience
The CSLB requires detailed documentation of your experience, including:
- Employer names, addresses, and phone numbers for each position
- Dates of employment (month and year)
- Description of electrical work performed
- Supervisor names who can verify your experience
- Certification or completion records from apprenticeship programs
Start gathering this documentation early — it is one of the most time-consuming parts of the application process.
The C-10 Exam: What to Expect
The C-10 trade exam is considered one of the more challenging CSLB exams. Here is a breakdown:
Exam Structure
- Number of questions: Approximately 115 multiple-choice questions
- Time limit: 4.5 hours
- Passing score: 72%
- Open book: Yes — you can bring reference materials
Key Exam Topics
- National Electrical Code (NEC): The largest portion of the exam — expect questions on conductor sizing, overcurrent protection, grounding, branch circuits, feeders, and service calculations. The 2023 NEC is the current reference standard.
- Safety regulations: Cal/OSHA electrical safety requirements, lockout/tagout procedures, PPE requirements, and arc flash safety
- Blueprint reading: Interpreting electrical drawings, symbols, schedules, and specifications
- Estimating and planning: Material takeoffs, labor calculations, and project planning
- Business and project management: Scheduling, coordination with other trades, and change order management
Exam Prep Tips
- Tab your NEC codebook: Since the exam is open book, having a well-organized, tabbed codebook is essential. Practice finding information quickly.
- Focus on calculations: Many questions require NEC calculations — practice load calculations, voltage drop, conductor sizing, and conduit fill until they are second nature.
- Take practice exams: Simulating exam conditions helps manage time pressure and identify weak areas.
- Study the California amendments: California has state-specific electrical code amendments that differ from the national NEC — these are tested.
Our exam prep program includes C-10-specific study materials, NEC code navigation training, and practice exams designed to mirror the actual test format.
You Also Need the Law and Business Exam
In addition to the C-10 trade exam, you must also pass the California Law and Business exam. This separate exam covers:
- CSLB rules and regulations
- California lien law and mechanics liens
- Contract requirements and consumer protection
- Workers compensation and employment law
- Business management, accounting, and estimating
The Law and Business exam has approximately 115 questions with a 3.5-hour time limit and a 72% passing score. It is the same exam for all contractor classifications.
Salary and Earnings Potential in 2026
California electrical contractors enjoy some of the highest earnings in the construction industry:
Employee Electricians vs. Business Owners
- Journeyman electrician (employee): Median salary of $65,000-$85,000 in California, with Bay Area and Los Angeles rates trending higher
- Licensed C-10 contractor (sole proprietor): Median income of $75,000-$120,000, depending on market and specialization
- C-10 business owner (with employees): Successful electrical contracting businesses generate $500,000-$2,000,000+ in annual revenue, with owner compensation often exceeding $150,000-$250,000
High-Earning Specializations
Certain electrical specializations command premium rates:
- EV charging installation: One of the fastest-growing segments, with demand projected to increase 300%+ through 2030
- Solar electrical: Connecting PV systems to the grid — often combined with C-46 solar license
- Commercial tenant improvements: Office and retail buildouts with complex electrical requirements
- Industrial controls: Factory and manufacturing electrical systems — highly specialized and well-compensated
- Smart home and automation: Growing residential demand for integrated electrical and technology systems
Career Growth Projections
The outlook for electrical contractors in California is exceptionally strong:
- The Bureau of Labor Statistics projects 11% job growth for electricians nationally through 2031 — faster than average
- California is investing billions in infrastructure, clean energy, and housing — all of which require electrical work
- EV mandates (all new cars sold in CA must be zero-emission by 2035) will drive massive demand for charging infrastructure
- Building electrification ordinances in major cities are creating new retrofit opportunities
- An aging workforce means fewer competitors as experienced electricians retire
Startup Costs for a C-10 Electrical Contracting Business
Here is a realistic breakdown of what it costs to launch an electrical contracting business in California:
- CSLB license application: ~$450
- Contractor bond ($25,000): Annual premium of $100-$500 (based on credit)
- General liability insurance: $2,000-$4,500 per year (electrical carries higher premiums due to fire risk)
- Workers compensation insurance: If you hire employees — rates vary but expect $3,000-$8,000+ per year for electrical classification
- Tools and equipment: $5,000-$15,000 for a well-equipped van (assuming you already have basic hand tools)
- Vehicle: $25,000-$45,000 for a work van or truck (new or used)
- Business registration and permits: $500-$2,000 depending on your city and county
- Software and technology: Estimating software, accounting software, project management — $100-$300 per month
- Marketing and website: $2,000-$5,000 for initial setup
Total estimated startup cost: $35,000-$75,000 depending on whether you buy or lease a vehicle and how much equipment you already own.
Insurance Needs for Electrical Contractors
Electrical work carries inherent risks that make proper insurance coverage non-negotiable:
- General liability: Minimum $1 million per occurrence, $2 million aggregate. Many commercial clients require $5 million.
- Workers compensation: Required if you have any employees. Electrical work has higher classification rates due to injury risk.
- Commercial auto: Required if you use vehicles for business. Covers accidents and damage to your work vehicle.
- Tools and equipment: Inland marine policy to cover your tools, whether stored in your van or at a job site.
- Professional liability (E and O): Covers errors in your electrical design or installation — increasingly important for design-build projects.
- Umbrella policy: Additional liability coverage beyond your primary policies — recommended for $1-$5 million.
Ready to Get Your C-10 License?
The C-10 Electrical classification offers one of the best combinations of earning potential, job security, and career growth in the California construction industry. Whether you are a journeyman electrician ready to start your own business or an entrepreneur looking to enter the electrical trade, the path to licensure is clear.
Start with our exam prep program to prepare for both the C-10 trade exam and the Law and Business exam. Our C-10 specific materials cover NEC code navigation, practice calculations, and exam strategies that have helped hundreds of electricians pass on their first attempt. View our pricing to find the right package for your goals.