Custom Locksmith & Alarm Inc
Services
Services estimated based on license classification. Claimed businesses can customize their service list.
About the C-7 — Low Voltage Systems License
The C-7 Low Voltage Systems license covers the installation, maintenance, and repair of systems that operate on low electrical voltage. This includes security alarms, fire detection systems, data and communication cabling, home automation, intercoms, CCTV surveillance, and structured wiring. As smart home technology and security needs continue to grow, C-7 contractors are increasingly in demand. Unlike C-10 electricians who work with standard electrical power, C-7 specialists focus on signal and data systems. This distinction is important because improper installation of low voltage systems can affect performance, void warranties, or create safety issues. When hiring a C-7 contractor, ask about their experience with your specific system type, whether they offer monitoring services, and if they stay current with rapidly evolving technology standards.
About the C28 — C28 License
A C28 (C28) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a C28 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
About the D04 — D04 License
A D04 (D04) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a D04 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
About the D16 — D16 License
A D16 (D16) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a D16 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
About the D28 — D28 License
A D28 (D28) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a D28 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
💡 Tips for Hiring a Low Voltage Systems Contractor
- Ask about their experience with your specific system brand or technology
- Inquire whether they offer ongoing monitoring or maintenance contracts
- Verify they stay current with evolving technology standards
- Get a network diagram or system design before installation begins
- Ask about warranty coverage for both equipment and labor
✅ Verify This License
Always verify contractor licensing directly with the Contractors State License Board (CSLB) before hiring. You can look up license #717989 to confirm it is active and check for any complaints or disciplinary actions.
Check on CSLB.ca.gov →🏢 Are you Custom Locksmith & Alarm Inc?
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Claim This Page →Frequently Asked Questions
What is the difference between C-7 and C-10 licenses?
A C-7 license covers low voltage systems like security, data cabling, and home automation. A C-10 license covers standard electrical work like wiring, panels, and outlets. If your project involves both, you may need contractors with each license.
Do I need a licensed contractor for security camera installation?
For professional-grade security and surveillance systems, yes — a C-7 licensed contractor ensures proper installation, code compliance, and reliable performance. Simple plug-and-play consumer cameras may not require a licensed installer.
Do I need a licensed C28 contractor in California?
Yes. California law requires a licensed contractor for any c28 work valued at $500 or more. Licensed contractors must pass exams, maintain bonding, and carry insurance. Hiring unlicensed contractors puts you at risk.
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