Prepare for the California Lock and Security Equipment (C-28) contractor licensing examination with a focused Book Reference Package covering planning and estimating, doors and hardware, mechanical locking systems, electronic locking systems, safes and vaults, video systems, fire-rated openings, life-safety hardware, electrical references, and job-site safety.
The California C-28 classification covers contractors who evaluate, set up, install, maintain, and repair doors and door assemblies, gates, locks and locking devices, panic and fire-rated exit devices, manual and automatic door and gate closures and releases, jail and prison locking devices, and permanently installed or built-in safes and vaults. The classification also includes master key systems, metal window guards, security doors, card-activated and electronic access control systems, control equipment, motion and other types of detectors, computer systems used for control and auditing, and associated security equipment.
Fire alarm systems are specifically excluded from the C-28 classification. Candidates should understand this distinction when studying the scope of work and evaluating which security and access-control activities fall within the classification.
Lock and security equipment work combines mechanical, electrical, electronic, hardware, access-control, life-safety, and door-system knowledge. A contractor may need to understand locks and cylinders, keying systems, hinges, closers, panic hardware, fire doors, access-control devices, wiring, electronic locking equipment, safes, vaults, video systems, and safe installation practices.
The C-28 contractor licensing examination is divided into six major subject areas: Planning and Estimating; Doors and Hardware; Electronic Locking Systems; Mechanical Locking Systems; Safes, Vaults, Security Containers, and Video Systems; and Safety. This reference package brings together California code materials, Door and Hardware Institute references, locksmithing resources, NFPA standards, electrical references, and Cal/OSHA materials to support preparation across those subjects.
The California C-28 examination is a closed-book examination. The references in this package are intended for study before test day so candidates can strengthen technical knowledge, become familiar with terminology and hardware functions, and transition toward independent recall during examination preparation.
The current California Contractors State License Board C-28 Lock and Security Equipment study guide applies to examinations scheduled on or after November 1, 2024. The examination is divided into six major sections:
Planning and Estimating represents approximately 24 percent of the examination and is the largest published category. Topics include plans and specifications, job-site surveys, system design, and project and material costs.
Candidates should be comfortable reviewing plans and specifications before beginning installation or repair work. Door schedules, hardware requirements, opening conditions, security needs, access-control requirements, electrical pathways, and life-safety considerations can affect how a lock or security system is designed and installed.
A job-site survey may involve inspecting existing doors, frames, gates, electrical conditions, locking hardware, clearances, mounting surfaces, access-control equipment, power availability, and the surrounding construction. Candidates should understand why accurate field information is important before selecting equipment or determining installation procedures.
System design can involve matching mechanical and electronic hardware to the required security function. Candidates may need to understand how locks, cylinders, keys, exit devices, door closers, electric strikes, magnetic locks, access-control devices, detectors, and related equipment interact.
Estimating preparation can include determining material quantities, hardware requirements, labor, replacement components, wiring needs, and other project costs. Candidates should be comfortable reading hardware information and connecting system requirements with the equipment needed to complete the work.
Doors and Hardware represents approximately 18 percent of the examination. Topics include locks, hardware and closing devices, exit devices, and doors and frames.
Candidates should understand the function of common architectural hardware, including hinges, locks, latches, closers, strikes, exit devices, and related door components. The Door and Hardware Institute handbooks in this package support preparation involving hardware terminology, functions, installation, and system relationships.
Doors and frames should be considered as part of the complete opening. A lock may function poorly if the door is misaligned, the frame is damaged, the hinges are worn, or the closer is improperly adjusted. Candidates should understand how the condition of the opening can affect security hardware operation.
Panic and fire-rated exit devices are especially important because they combine security with life-safety considerations. The California Building Code, California Fire Code, NFPA 80, and NFPA 101 support preparation involving fire-rated openings, exit hardware, door operation, and life-safety requirements.
Electronic Locking Systems represents approximately 20 percent of the examination. Published topics include wiring, locking and operating devices and software, and controls, surveillance, and accessories.
Electronic locking systems can involve electric strikes, electrically controlled locks, magnetic locking devices, access-control readers, request-to-exit devices, sensors, control panels, power supplies, and other connected components. Candidates should understand how these devices interact within an access-control system.
Wiring knowledge is important because electronic locking equipment depends on appropriate electrical connections and control circuits. Ugly's Electrical References supports preparation involving electrical terminology, basic calculations, conductors, circuits, and related field concepts.
Electronic systems can also involve software and control functions. Candidates should understand the difference between devices that physically secure an opening and the systems that authorize, monitor, or record access.
Surveillance and accessory topics can include equipment used to support security monitoring and control. The C-28 classification includes card-activated and electronic access-control systems, detectors, computer control systems, and associated equipment, but it specifically excludes fire alarm systems.
Mechanical Locking Systems also represents approximately 20 percent of the examination. Topics include lock cylinders, key generation, lock bypass, and master key systems.
Candidates should understand mechanical lock construction, cylinder operation, key terminology, keying relationships, lock functions, and methods used to service and maintain mechanical systems. The Complete Book of Locks and Locksmithing and the Door and Hardware Institute materials support preparation in these areas.
Key generation requires understanding how keys correspond to locking components and how keying information is used during service work. Master key systems require additional attention because they organize access at multiple levels while maintaining control over individual openings.
The Door and Hardware Institute Keying Systems and Nomenclature reference can help candidates build familiarity with keying terminology and system structure, while the Lock Function Chart supports understanding of how different lock functions are applied to different openings.
Safes, Vaults, Security Containers, and Video Systems represents approximately 7 percent of the examination. Topics include safe installation and repair, vaults and other security containers, safe deposit locks, drilling or penetrating safes, and installing and repairing video systems.
Safe and vault work requires candidates to understand the physical security purpose of these systems, their locking mechanisms, installation considerations, and appropriate repair methods. Permanently installed or built-in safes and vaults fall within the C-28 classification.
Video systems are also part of this examination category. Candidates should understand installation and repair concepts associated with security video equipment as it relates to the C-28 trade.
Safety represents approximately 11 percent of the examination. Published topics include personal protective equipment, power tools and equipment, and working safely in elevated areas.
Lock and security work can involve drilling, cutting, electrical exposure, ladders, elevated work, heavy doors, powered equipment, sharp metal edges, and active construction environments. Candidates should review safe practices for both service work and new installations.
The C-28 examination is multiple choice with four choices per question and one best answer. Some questions require mathematical computation, and a calculator is provided for applicable calculations.
The California Lock and Security Equipment (C-28) contractor licensing examination is a closed-book examination. No reference materials may be used during testing.
The books and standards in this package are intended to help candidates build technical knowledge before examination day. Early study can involve using the references to understand lock functions, keying terminology, door hardware, fire-rated openings, electrical concepts, access-control components, and safety requirements.
As preparation progresses, candidates should practice identifying hardware, interpreting terminology, explaining system functions, and solving technical questions without immediately consulting the books. This helps develop stronger recall for closed-book testing conditions.
Planning and Estimating represents approximately 24 percent of the examination and deserves substantial study attention. Electronic Locking Systems and Mechanical Locking Systems each represent approximately 20 percent, making them equally important areas of preparation.
Doors and Hardware represents approximately 18 percent and should be studied alongside mechanical and electronic locking systems because the complete opening often determines whether security hardware functions correctly.
Safety and the safes, vaults, security containers, and video systems category should also remain part of a balanced study plan.
The California Contractors State License Board administers the C-28 Lock and Security Equipment contractor classification. Applicants pursuing this classification must complete the qualification, application, examination, and license-issuance requirements that apply to their circumstances.
The California C-28 classification covers evaluation, setup, installation, maintenance, and repair of doors, door assemblies, gates, locks, locking devices, panic and fire-rated exit devices, automatic and manually operated closures and releases, jail and prison locking devices, and permanently installed or built-in safes and vaults.
The classification also includes master key systems, metal window guards, security doors, card-activated and electronic access-control systems, control equipment, motion and other detectors, computer systems used for security control and auditing, and associated equipment.
Fire alarm systems are specifically excluded from the C-28 classification. Candidates should understand this limitation when studying the authorized scope of work.
Because many C-28 installations involve doors and means of egress, contractors should understand how hardware selection and installation interact with California building, fire, and life-safety requirements.
Prioritize Planning and Estimating. At approximately 24 percent, it is the largest examination category. Review plans, specifications, job-site surveys, system design, equipment selection, and project costs.
Study mechanical and electronic systems separately. Each category represents approximately 20 percent of the exam. Build a clear understanding of cylinders, keys, master keying, lock bypass, wiring, electronic locking devices, access control, controls, and surveillance equipment.
Study the complete door opening. Locks, hinges, frames, closers, exit devices, and door alignment all affect system operation. Avoid treating the lock as an isolated component.
Use the Door and Hardware Institute materials to reinforce terminology. Accurate understanding of hardware names and functions can make technical questions easier to interpret.
Review fire-rated and life-safety openings. Use the California Building Code, California Fire Code, NFPA 80, and NFPA 101 to strengthen understanding of doors, exits, panic hardware, fire-rated openings, and egress.
Include basic electrical preparation. Electronic locking and access-control systems require an understanding of wiring and electrical concepts. Ugly's Electrical References supports this area.
Do not overlook safes, vaults, and video systems. Although this category represents approximately 7 percent, it remains part of the examination and should be included in preparation.
Build closed-book recall. Use the references to learn unfamiliar concepts, then practice explaining lock functions, keying relationships, wiring concepts, door hardware, and safety procedures without consulting the books.
1 Exam Prep supports California C-28 contractor candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation when applicable, and a structured approach to Lock and Security Equipment examination subjects.
The C-28 Book Reference Package helps divide a technical trade into manageable areas. Candidates can focus separately on Planning and Estimating, Doors and Hardware, Electronic Locking Systems, Mechanical Locking Systems, Safes and Vaults, Video Systems, and Safety.
The Door and Hardware Institute references help candidates build a stronger vocabulary for locks, doors, frames, closers, exit devices, keying systems, and architectural hardware. The Complete Book of Locks and Locksmithing supports deeper study of mechanical locks, cylinders, keys, servicing, and locksmithing methods.
The California Building Code, California Fire Code, NFPA 80, and NFPA 101 help candidates connect security hardware with fire protection, life safety, door operation, and means-of-egress considerations.
Ugly's Electrical References supports electronic locking preparation by reinforcing electrical terminology, wiring concepts, circuits, and practical electrical information.
The Cal/OSHA references help candidates review PPE, tools, electrical exposure, elevated work, drilling, equipment, and construction-site safety.
Practice-oriented preparation can include interpreting hardware terminology, matching lock functions to applications, reviewing master key relationships, tracing electronic locking components, evaluating door conditions, and identifying safe installation procedures.
Because the C-28 examination is closed book, 1 Exam Prep encourages candidates to progress from reference-supported study toward independent recall. The goal is to build an organized understanding of locks, doors, access control, hardware, electronic systems, life safety, security equipment, and safe work practices.
Yes. The California Lock and Security Equipment C-28 contractor licensing examination is a closed-book examination.
Planning and Estimating is the largest published category at approximately 24 percent.
Electronic Locking Systems represents approximately 20 percent and includes wiring, locking and operating devices, software, controls, surveillance, and accessories.
Mechanical Locking Systems represents approximately 20 percent and includes lock cylinders, key generation, lock bypass, and master key systems.
Yes. Doors and Hardware represents approximately 18 percent and includes locks, closing devices, exit devices, doors, and frames.
Yes. The examination includes safe installation and repair, vaults and other security containers, safe deposit locks, and drilling or penetrating safes.
Yes. Installing and repairing video systems is included within the Safes, Vaults, Security Containers, and Video Systems category.
No. Fire alarm systems are specifically excluded from the California C-28 Lock and Security Equipment classification.
They support preparation involving fire-rated openings, door operation, exit hardware, means of egress, and life-safety requirements that can affect security-equipped doors.
They support preparation involving architectural hardware terminology, keying systems, lock functions, door hardware, and installation practices.
Electronic locks and access-control equipment can involve wiring and electrical concepts. This reference supports electrical terminology, calculations, circuits, conductors, and related field knowledge.
Safety represents approximately 11 percent and includes personal protective equipment, power tools and equipment, and working safely in elevated areas.
Yes. The classification includes card-activated and electronic access-control systems, control equipment, detectors, computer control and audit systems, and associated equipment.
The references help candidates build technical knowledge before testing. Candidates can study door hardware, locksmithing, electronic systems, fire-rated openings, electrical concepts, and safety before transitioning toward independent recall.
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