CSLB Quick Facts

License required for jobs over
$1,000
Minimum contractor bond
$25,000
Journey-level experience
4 years
Current exam passing scores
School-observed: 65% for Law & Business and 63% to 71% for trade exams; CSLB does not publish fixed passing scores

The CSLB oversees 46 contractor classifications in California.

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Classifications Specialty (C) C-10

Become a Licensed C-10 Electrical Contractor

The C-10 Electrical classification is one of California's most in-demand contractor licenses. Wire commercial buildings, install solar systems, upgrade residential panels - and earn top-tier income doing it.

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About This Classification

What Does a C-10 Electrical Contractor Do?

A C-10 Electrical Contractor installs, alters, and repairs electrical systems and equipment. This includes power, lighting, signaling, communications, and low-voltage systems (essentially anything that carries electricity in a building or structure).

The C-10 is one of the most versatile and in-demand contractor classifications in California. Licensed C-10 contractors work on everything from residential panel upgrades to commercial tenant improvements, solar installations, EV charging stations, industrial motor controls, and data center infrastructure.

Per California Code of Regulations (Title 16, Division 8, Article 3), a C-10 contractor "places, installs, erects or connects any electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells or any part thereof, which generate, transmit, transform or utilize electrical energy in any form or for any purpose." Note that solar PV is explicitly named in the regulation.

Scope of Work

  • Electrical wiring and rewiring (residential & commercial)
  • Main panel installation and upgrades (100A, 200A, 400A+)
  • Sub-panel installation and circuit additions
  • Lighting systems (interior, exterior, landscape)
  • Solar photovoltaic (PV) system installation
  • EV charging station installation
  • Generator installation and transfer switches
  • Motor controls and industrial equipment wiring
  • Fire alarm and security system wiring
  • Data and communications cabling
  • Transformer installation
  • Conduit, raceway, and cable tray systems

High-Demand Specialties

  • Solar & Renewables, California's solar mandate drives massive demand
  • EV Infrastructure, commercial and residential charging installations
  • Smart Home / Automation, control systems, smart panels, IoT wiring
  • Data Centers, high-voltage distribution, redundant power systems

Important Notes

  • Projects over $1,000 (labor + materials) require a C-10 license
  • C-10 overlaps with C-7 (Low Voltage); C-10 can do both high and low voltage
  • Must pull permits for all electrical work per California Electrical Code

The CSLB Exam

What's on the C-10 Electrical Exam?

1

Law & Business

Same for all classifications

  • 115 questions, multiple choice, computer-based
  • 3.5 hours allotted
  • Topics: California contractor law, business management, safety, estimating, project management
2

C-10 Trade Exam

Electrical-specific

  • about 100 questions, multiple choice, computer-based
  • 3.5 hours allotted
  • Topics: electrical theory, NEC code, wiring methods, motors & controls, grounding, load calculations, blueprints

How to Get Your C-10 Electrical License

Step 1

Qualify

18+ is CSLB's normal applicant path. A minor may qualify only after a court appoints a guardian (BPC §7065.5). You also need a valid SSN/ITIN and 4 full-time-equivalent years of journey-level electrical experience within the past 10 years; CSLB prorates part-time work. Up to 3 years may be substituted with approved education or apprenticeship.

Step 2

Apply to CSLB

Submit your application, get fingerprinted, and pay the $450 application fee. Processing times vary; check the CSLB's current processing times.

Step 3

Study & Prepare

Prepare for both exam parts, on your own or with a CSLS exam prep program. 99% of CSLS students pass on their first try, backed by our 100% Money-Back Guarantee.

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Step 4

Pass the Exam

Two parts: Law & Business (115q, 3.5 hrs) + C-10 Trade. Multiple choice, computer-based. CSLS has observed scores of 65% Law & Business / 69% C-10 Trade; CSLB does not publish fixed passing scores and may vary them by exam version.

Step 5

Get Licensed

Post your $25,000 contractor bond, pay the $200 license fee, and receive your C-10 license. You're officially in business.

Career Outlook

Why Get Your C-10 Electrical License?

$76,540

Median CA Salary (BLS)

11%

Job Growth (2023–2033)

73,000+

Electricians in CA

$97K+

Avg. Contractor Income

Massive & Growing Demand

California employs over 73,000 electricians, the most of any state. The BLS projects 11% national job growth through 2033 (faster than average), with ~73,500 annual openings. The state's EV mandate (35% zero-emission by 2026), solar requirements on new construction, and all-electric building codes are creating a massive installation pipeline.

Versatile Career Paths

With a C-10 license, you can specialize in residential, commercial, or industrial work. High-growth niches include solar PV (explicitly named in the C-10 regulation), EV charging infrastructure (California needs ~1.2 million chargers by 2030), battery storage systems, and data center construction.

Premium Earning Potential

California electricians earn a 23% premium over the national median, $76,540 vs. $62,350 (BLS). The top 25% earn over $103,720. Licensed C-10 contractors running their own businesses average $97,775/year, with top earners in SF and San Jose exceeding $120,000. The license is legally required for projects over $1,000, a competitive moat that opens the door to larger commercial contracts.

C-10 vs. C-7: Know the Difference

The C-10 covers all voltage levels (high and low). C-10 holders can legally perform all C-7 (Low Voltage) work, but the reverse is not permitted. C-7 is limited to energy-limited systems that do not exceed 91 volts (CCR §832.07). If you want the broadest electrical scope, the C-10 is the license to get.

Exam Prep Programs

Compare C-10 Electrical Exam Prep Programs

Every program prepares you for the required CSLB exam for C-10 Electrical. Our 99% first-time pass rate is backed by the 100% Money-Back Guarantee on eligible programs.

Feature-by-feature comparison of all four CSLS exam prep programs
Features Most Popular All-Inclusive C-10 Electrical $1,195.00 Value: $2,500 Live Online C-10 Electrical $695.00 Value: $995 Crash Course C-10 Electrical $495.00 Value: $695 Home Study C-10 Electrical $295.00 Value: $395
Best For Comprehensive prep with maximum support Remote learners wanting live instruction Experienced pros with an exam date soon Self-directed independent learners
Law & Business Classes 4 Classes + Full-Day Review 4 Live Online + Review Full-Day Review Only Not included
Trade Math Training 30-Day Interactive + Review Online Video Review 14-Day Crash Course Not included
Test-Taking Skills Seminar 1-Day In-Person 1-Day Online Not included Not included
Law & Business Materials Online; binder add-on available Online; binder add-on available Online; binder add-on available Online; binder add-on available
Trade-Specific Materials Online; binder add-on available Online; binder add-on available Online; binder add-on available Online; binder add-on available
Study Materials Full Online Suite Online Materials + Audio/Video Online + Audio/Video Online + Audio
Online Videos Full Suite: L&B, Trade, H&S, Math Audio + H&S + Math Videos Audio + H&S + Math Videos L&B Audio + H&S Video
Law & Business Practice Exams 6 Months 2 Months 30 Days 30 Days
Trade Practice Exams 6 Months 2 Months 30 Days 30 Days
School Location Access 25+ Locations 25+ Locations 25+ Locations Self-Study Only
Application Assistance Preparation & Review Review Only Review Only Not included
Money-Back Guarantee Included Included Included Not included
Bond Fee Discount 50% off first-year bond, up to $120 Not included Not included Not included
Retail Value $2,500 $995 $695 $395
Choose a program Get All-Inclusive Get Live Online Get Crash Course Get Home Study

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Common Questions

C-10 Electrical License FAQ

From application to license-in-hand, typically 2-4 months. This includes CSLB processing time (2-4 weeks), scheduling your exam, passing both parts, and posting your bond. With CSLS exam prep, most students are exam-ready in 4-6 weeks.
4 full-time-equivalent years of journey-level electrical experience within the past 10 years; CSLB prorates part-time work. Qualifying work may be as a journeyperson, foreperson, supervising employee, contractor, or owner-builder. Up to 3 years may be substituted with approved education or apprenticeship.
The C-10 (Electrical) covers all voltage levels, high and low. C-10 holders can legally perform all C-7 (Low Voltage Systems) work, but the reverse is not permitted. C-7 is limited to energy-limited systems that do not exceed 91 volts, such as security and data/comm systems (low-voltage fire alarm systems are specifically excluded from C-7, CCR §832.07). If you want the broadest scope, the C-10 is the license to get.
Yes. Solar photovoltaic (PV) cells are explicitly named in the C-10 regulation. The C-10 covers PV system installation, inverter installation, and all electrical connections. The C-46 (Solar) also covers solar work, but the C-10 gives you broader scope across all electrical work.
The C-10 trade exam has about 100 multiple-choice questions based on CSLS prep materials; CSLB's official study guide does not publish a fixed count. It covers electrical theory, NEC code, wiring methods, motors, grounding, and load calculations. CSLS has observed a 69% passing score, but CSLB does not publish a fixed passing score and may vary it by exam version. With CSLS exam prep, 99% of students pass on their first attempt, backed by our 100% Money-Back Guarantee.
The median salary for electricians in California is $76,540 (BLS), with the top 25% earning over $103,720. Licensed C-10 contractors running their own businesses average $97,775/year. California pays a 23% premium over the national median. Top earners in SF and San Jose exceed $120,000.
In California, any electrical project over $1,000 (labor and materials combined) requires a licensed contractor. This threshold was updated by AB 2622, effective January 1, 2025. Working without a license on projects above this amount is illegal and carries significant penalties.

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