California Electrical (C-10) Contractor Licensing Exam Prep Business & Trade Courses + Application + State Fees + 1st-Year Bond Package

California Electrical (C-10) Contractor Licensing Exam Prep Business & Trade Courses + Application + State Fees + 1st-Year Bond Package

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California Electrical (C-10) Contractor Licensing Exam Prep Business & Trade Courses + Application + State Fees + 1st-Year Bond Package

Prepare for the California Electrical (C-10) contractor licensing examinations with a comprehensive Business and Trade package that combines C-10 Trade exam preparation, California Law and Business exam preparation, Application Service, applicable state licensing fees, business setup, and first-year contractor bond cost coverage. This package is designed for candidates pursuing the California C-10 contractor license who want technical exam preparation and licensing-process support organized in one solution.

The California C-10 Electrical classification applies to contractors who place, install, erect, or connect electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells, and related components that generate, transmit, transform, or use electrical energy. The classification covers a wide range of residential, commercial, industrial, renewable-energy, equipment, power-distribution, and electrical-system work within the authorized scope.

The C-10 trade examination requires candidates to prepare for electrical planning, estimating, calculations, code requirements, rough wiring, raceways, panels, conductors, grounding and bonding, finish wiring, electrical devices, motors, equipment, labeling, testing, system startup, troubleshooting, maintenance, photovoltaic systems, generators, batteries, energy storage, and job-site safety.

This package also includes Law and Business exam preparation. Candidates can study California contractor licensing, contracts, business organization, financial management, employment, insurance, liens, public works, and contractor responsibilities while preparing for the technical C-10 examination.

The package further includes Application Service, the application fee, initial license fee, applicable state license fees, business setup, and the first-year cost of the contractor bond required by the state up to $233.

Reference books are not included in this package. The California codes, electrical handbooks, photovoltaic materials, electrical field references, and Cal/OSHA safety resources listed below are study materials and may be obtained separately.

What You Get

  • C-10 Electrical Trade Course: Preparation covering planning, estimating, electrical calculations, rough wiring, finish wiring, grounding and bonding, motors, equipment, energy systems, troubleshooting, maintenance, and safety.
  • Law and Business Exam Preparation: Preparation covering California contractor licensing, contracts, business operations, finances, employment, insurance, liens, public works, and contractor responsibilities.
  • Application Service: Support with the California contractor licensing application process.
  • Application Fee: Included with this package.
  • Initial License Fee: Included with this package.
  • State License Fees: Applicable state licensing fees are included as part of the package.
  • Business Setup: Business setup support is included.
  • First-Year Contractor Bond Cost: The first-year cost of the state-required contractor bond is included up to $233.

Reference books are not included.

Exam Details

The California Electrical (C-10) trade examination is divided into five major content areas.

  • Planning and Estimating — 28%
    This section includes evaluating existing electrical systems, interpreting plans and specifications, performing electrical calculations, applying code requirements, selecting materials, and planning energy-production and storage projects.
  • Rough Wiring — 27%
    This section includes system layout, clearances, accessibility, raceway installation, panel installation, conductors, grounding and bonding, equipment installation, and rough wiring for energy-production and storage systems.
  • Finish Wiring and Trim — 11%
    This section includes device placement, finish electrical installation, motors and equipment, labeling, trims and sealants, and finish wiring associated with energy systems.
  • Startup, Troubleshooting, and Maintenance — 16%
    This section includes system energizing, testing, diagnosis of electrical problems, locating inoperable wires or components, repairs, replacements, test-equipment selection, and evaluation of energy-system performance.
  • Safety — 18%
    This section includes lockout/tagout procedures, personal protective equipment, tools and equipment, hazardous materials, and job-site environments.

Planning and Estimating is the largest portion of the examination at approximately 28%, followed closely by Rough Wiring at approximately 27%. Safety represents approximately 18%, Startup, Troubleshooting, and Maintenance represents approximately 16%, and Finish Wiring and Trim accounts for approximately 11%.

The examination uses multiple-choice questions with four answer choices and one best answer. Some questions require mathematical computation, and a calculator is provided during testing. There is no penalty for guessing, so candidates should attempt every question.

Electrical calculations are an important part of C-10 preparation. Candidates should be comfortable working through practical electrical relationships, project quantities, conductor and equipment requirements, circuit conditions, and other code-based calculations encountered in electrical contracting.

Closed Book Test

The California Electrical (C-10) trade examination is a closed-book examination. Candidates cannot use the California Electrical Code, Building Code, Energy Code, Fire Code, electrician handbooks, photovoltaic references, notes, or other study materials during the test.

The California Law and Business examination is also a closed-book examination. Candidates should be prepared to recall and apply contractor licensing, contract, business, financial, employment, insurance, lien, public works, and safety concepts without relying on outside references.

Closed-book preparation should emphasize understanding electrical principles and installation practices rather than depending on reference lookup. Candidates should be able to evaluate system conditions, select appropriate materials, perform calculations, identify grounding and bonding requirements, understand wiring methods, recognize equipment requirements, troubleshoot electrical problems, and select safe procedures from memory.

The listed references can be used during preparation to build technical familiarity. Candidates can then transition to practice-oriented study without the books to strengthen recall for both the C-10 Trade and Law and Business examinations.

Licensing Steps

The California Contractors State License Board administers the C-10 Electrical contractor classification and the associated licensing process.

  1. Meet applicable CSLB licensing qualifications. The qualifying individual must satisfy California requirements relating to age, identification, and qualifying experience.
  2. Document qualifying C-10 experience. The qualifier must provide experience information for the Electrical classification through the CSLB application process.
  3. Prepare the contractor license application. This package includes Application Service to support preparation of the licensing application.
  4. Submit the application and applicable fee. The application fee is included with this package.
  5. Complete CSLB application review. CSLB reviews the submitted application and determines the applicable examination and licensing requirements.
  6. Complete applicable fingerprinting requirements. Individuals required to provide fingerprints must complete the applicable process.
  7. Complete applicable asbestos-related licensing requirements. California contractor applicants may be required to complete the CSLB asbestos open-book requirement as part of the licensing process.
  8. Complete the Law and Business examination requirement. Qualifying individuals generally must pass the California Law and Business examination unless an approved waiver applies.
  9. Complete the C-10 Electrical examination requirement. Qualifying individuals generally must pass the C-10 trade examination unless an applicable waiver is approved.
  10. Complete license issuance requirements. The initial license fee and applicable state licensing fees identified as part of this package are included.
  11. Meet the contractor bond requirement. This package includes the first-year cost of the required contractor bond up to $233.
  12. Complete business setup. Business setup support is included as part of the package.

State Requirements

California defines a C-10 Electrical contractor as a contractor who places, installs, erects, or connects electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells, and related components that generate, transmit, transform, or utilize electrical energy.

The C-10 classification is broad and is not limited to one particular type of electrical system. Contractors may encounter residential wiring, commercial electrical systems, motors, equipment, power distribution, renewable-energy systems, energy storage, controls, and other electrical work within the authorized scope.

Grounding and bonding are important C-10 subjects because electrical systems require appropriate fault-current paths and bonding of applicable conductive components. Candidates should understand the function of grounding and bonding and recognize common installation practices.

Energy production and storage are incorporated throughout the current examination. Candidates should prepare for photovoltaic systems, generators, batteries, capacitors, and related equipment during planning, rough wiring, finish wiring, testing, and troubleshooting.

Electrical work may also be affected by building, fire, and energy requirements. Equipment locations, penetrations, working clearances, energy systems, fire-related building conditions, and energy-efficiency requirements can influence electrical project planning and installation.

The C-10 classification is broader than the C-7 Low Voltage Systems classification. C-10 contractors may perform electrical work within the authorized C-10 scope without being limited by the C-7 voltage restriction.

The package includes the licensing-process items identified for this product: Application Service, application fee, initial license fee, applicable state license fees, business setup, and first-year contractor bond cost coverage up to $233.

Reference Books

The following reference books are not included in this package. They are listed as study resources for candidates preparing for the California C-10 Electrical examination.

  • 2025 California Building Code, California Code of Regulations, Title 24
    A California construction reference supporting study of building conditions that interact with electrical work, including penetrations, accessibility, equipment locations, structural coordination, and construction requirements.
  • 2025 California Electrical Code, California Code of Regulations, Title 24
    A primary electrical reference supporting preparation involving wiring methods, conductors, overcurrent protection, raceways, services, equipment, motors, grounding and bonding, photovoltaic systems, energy storage, and electrical installations.
  • 2025 California Energy Code, California Code of Regulations, Title 24
    A California energy reference supporting study of building-energy requirements, electrical systems, lighting, controls, energy efficiency, and related construction requirements.
  • 2025 California Fire Code, California Code of Regulations, Title 24
    A fire-safety reference supporting preparation involving equipment locations, energy systems, access, fire-related building conditions, and other requirements that can interact with electrical construction.
  • American Electrician's Handbook, 17th Edition
    A comprehensive electrical reference supporting preparation involving electrical theory, calculations, wiring methods, conductors, raceways, motors, transformers, equipment, installation practices, and troubleshooting.
  • Photovoltaic Systems, 3rd Edition, 2011
    A photovoltaic reference supporting study of modules, arrays, conductors, inverters, grounding and bonding, system components, installation practices, testing, and photovoltaic operation.
  • Ugly's Electrical References
    A practical field reference supporting preparation involving electrical formulas, conductor information, calculations, grounding concepts, motors, wiring methods, equipment, and commonly used electrical data.
  • Cal/OSHA General Industry & Electrical Safety Orders
    A California workplace safety reference supporting study of energized equipment, lockout/tagout, electrical hazards, PPE, tools, machinery, and employee protection.
  • Cal/OSHA Construction & Electrical Safety Orders
    A California construction safety reference supporting preparation involving electrical exposure, temporary power, ladders, elevated work, tools, equipment, PPE, and electrical job-site hazards.

Test Information and Study Materials

For Planning and Estimating, candidates should practice interpreting electrical plans, specifications, panel schedules, equipment schedules, one-line diagrams, site plans, architectural drawings, and project notes. Existing-system evaluation can also require understanding installed equipment and identifying conditions that affect alterations or additions.

Electrical calculations should receive focused study time. Candidates should practice applying formulas and code-related concepts to realistic project situations rather than memorizing isolated equations without understanding their purpose.

Material selection can involve conductors, cables, raceways, boxes, panels, breakers, switches, receptacles, fixtures, motors, controls, grounding components, photovoltaic equipment, generators, batteries, and other electrical-system components.

For Rough Wiring, candidates should review system layout, raceways, boxes, panels, conductors, equipment, working clearances, accessibility, grounding, bonding, and installation sequences.

Raceway installation requires consideration of routing, support, bends, fittings, boxes, fill, access, equipment location, and coordination with surrounding construction. Candidates should understand how proper installation supports both compliance and future serviceability.

Grounding and bonding are specifically identified within Rough Wiring. Candidates should understand the purpose of equipment grounding, bonding, grounding electrode systems, and the components commonly used to create effective electrical fault paths.

Energy-production and storage rough wiring can involve photovoltaic systems, generators, batteries, capacitors, and other related equipment. Candidates should understand how these systems integrate with conventional electrical infrastructure.

For Finish Wiring and Trim, candidates should review switches, receptacles, fixtures, devices, final terminations, motors, equipment, labels, trims, sealants, and finish wiring for energy systems.

Motors and equipment can involve disconnects, controls, conductors, grounding, overcurrent protection, terminations, and final verification. Candidates should understand how equipment requirements influence installation decisions.

Accurate labeling supports operation, maintenance, troubleshooting, inspection, emergency response, and future modifications. Candidates should recognize the importance of proper circuit and equipment identification.

For Startup, Troubleshooting, and Maintenance, candidates should study system energization, test procedures, common electrical faults, diagnostic methods, repairs, replacements, and selection of appropriate test equipment.

Troubleshooting should be systematic. Electrical problems may originate in conductors, terminations, circuit protection, controls, motors, equipment, grounding, power supply, or system configuration. Proper test instruments can help isolate the source of a problem.

Energy-production and storage systems are also included in performance evaluation and troubleshooting. Candidates should be prepared for photovoltaic systems, generators, batteries, capacitors, and related equipment after installation.

For Safety, candidates should review lockout/tagout, electrical shock hazards, energized systems, PPE, tools, equipment, hazardous materials, ladders, elevated work, temporary power, housekeeping, and changing job-site conditions.

Lockout/tagout is specifically included in the C-10 examination outline. Candidates should understand the purpose of controlling hazardous electrical energy and preventing unexpected energization while work is being performed.

Personal protective equipment should correspond to the hazards involved. Electrical contractors can encounter energized components, sharp materials, power tools, elevated work, heavy equipment, and other conditions that require appropriate protective measures.

The Law and Business examination requires dedicated preparation in addition to technical C-10 study. Candidates should review contractor licensing, contracts, business organization, financial management, employment, insurance, liens, public works, and contractor safety responsibilities.

Because both examinations are closed book, candidates should regularly practice applying electrical, estimating, safety, and contractor business knowledge without relying on the listed references. Reference-based study followed by closed-book practice can help strengthen recall.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps candidates prepare for the California Electrical (C-10) contractor licensing process through organized Business and Trade courses, application support, licensing-process assistance, reference navigation, practice-oriented preparation, and structured study guidance.

The C-10 Trade course helps candidates work systematically through electrical planning, estimating, calculations, raceways, panels, conductors, grounding and bonding, rough wiring, finish wiring, motors, equipment, photovoltaic systems, energy storage, testing, troubleshooting, maintenance, and safety.

The Business course supports preparation for California Law and Business subjects, including contractor licensing, contracts, business organization, finances, employment, insurance, liens, public works, payments, and contractor responsibilities.

Application Service supports the California contractor licensing application process. The package also includes the application fee, initial license fee, applicable state licensing fees, business setup, and first-year contractor bond cost coverage up to $233.

Reference-navigation guidance can help candidates work effectively with independently obtained California Building, Electrical, Energy, and Fire Codes, electrician references, photovoltaic resources, field electrical guides, and Cal/OSHA safety materials during preparation.

No exam preparation or licensing-support package can guarantee a passing examination result or contractor license approval. Organized electrical study, calculation practice, closed-book review, contractor business preparation, and structured licensing support can help candidates approach the California C-10 licensing process with stronger familiarity and preparation.

FAQ Section

What is included with this California C-10 package?

The package includes C-10 Electrical Trade exam preparation, Law and Business exam preparation, Application Service, the application fee, initial license fee, applicable state license fees, business setup, and first-year contractor bond cost coverage up to $233.

Are the reference books included?

No. Reference books are not included in this package. The listed California codes, electrical handbooks, photovoltaic materials, field references, and safety resources may be obtained separately for study.

Does this package include Law and Business exam preparation?

Yes. California Law and Business exam preparation is included along with the C-10 Electrical Trade course.

Is Application Service included?

Yes. Application Service is included with this package.

Are the application fee and initial license fee included?

Yes. The application fee and initial license fee are included, along with applicable state license fees identified as part of this package.

Is business setup included?

Yes. Business setup support is included.

Is the first-year contractor bond cost included?

Yes. The package includes the first-year cost of the state-required contractor bond up to $233.

Is the California C-10 examination open book?

No. The California Electrical trade examination is closed book. Reference materials cannot be used during testing.

What subjects are covered on the C-10 examination?

The examination covers Planning and Estimating, Rough Wiring, Finish Wiring and Trim, Startup and Troubleshooting and Maintenance, and Safety.

What is the largest section of the C-10 examination?

Planning and Estimating is the largest section at approximately 28%, followed closely by Rough Wiring at approximately 27%.

Does the C-10 examination cover solar photovoltaic systems?

Yes. Photovoltaic systems are included in planning, rough wiring, finish wiring, testing, and system-performance subjects.

Does the C-10 exam cover batteries and energy storage?

Yes. Batteries, capacitors, generators, photovoltaic systems, and other energy-production and storage subjects are included in the examination outline.

Does the C-10 examination cover grounding and bonding?

Yes. Grounding and bonding are specifically included within the Rough Wiring portion of the examination.

Does the C-10 examination cover troubleshooting?

Yes. Startup, Troubleshooting, and Maintenance represents approximately 16% of the examination and includes system testing, electrical problems, repairs, replacements, and test equipment.

Does the C-10 examination include electrical safety?

Yes. Safety represents approximately 18% of the examination and includes lockout/tagout, PPE, tools and equipment, hazardous materials, and job-site environments.

What work does a California C-10 contractor perform?

A C-10 contractor places, installs, erects, or connects electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells, and related components that generate, transmit, transform, or use electrical energy.

Can a C-10 contractor perform low-voltage electrical work?

Yes. The C-10 Electrical classification is broader than the C-7 Low Voltage Systems classification and is not subject to the C-7 voltage limitation when performing electrical work within the authorized C-10 scope.

How should I prepare for the C-10 and Law and Business examinations?

Divide study time between electrical trade subjects and California contractor business topics. Review planning, calculations, code concepts, rough wiring, grounding and bonding, finish wiring, motors, equipment, photovoltaic systems, energy storage, troubleshooting, maintenance, and safety for the C-10 examination while studying licensing, contracts, finances, employment, insurance, liens, public works, and contractor responsibilities for Law and Business. Because both examinations are closed book, regular practice without references is important.