Connecticut L-5 / L-6 Low Voltage Contractor License Requirements (2026)

The Connecticut Department of Consumer Protection (DCP) Trades Examining Division regulates low-voltage work under Conn. Gen. Stat. Chapter 393 (Electrical Work) and Chapter 534 (Public Safety, Burglar/Fire Alarm). DCP issues paired contractor and journeyperson credentials in two scopes: the L-5 Limited Electrical Contractor and C-5 Limited Electrical Journeyperson cover low-voltage signaling, communication, sound, intercom, energy management, and fire alarm wiring up to 50 V; and the L-6 Limited Electrical Contractor and C-6 Limited Electrical Journeyperson cover security, fire alarm, and intrusion detection systems including monitored CCTV. Each business needs an L-5 or L-6 contractor license and every installer needs a paired C-5 or C-6 journeyperson license. The Department of Emergency Services and Public Protection (DESPP) Special Licensing and Firearms Unit additionally licenses Alarm Companies and Salespersons under Conn. Gen. Stat. §29-156g for the business of selling and monitoring alarm services.

Regulatory Oversight

Under Conn. Gen. Stat. §20-330 et seq. (Occupational Licensing: electrical, plumbing, heating and cooling trades); Conn. Gen. Stat. §20-418 et seq. (Home Improvement Act); Conn. Gen. Stat. §20-417a et seq. (New Home Construction Contractors Act), Connecticut Department of Consumer Protection — Occupational and Professional Licensing Division (DCP) is the body that issues this license and enforces compliance with it. The Connecticut Department of Consumer Protection registers home improvement and new home construction contractors, licenses individual electrical, plumbing and heating/cooling tradespeople, administers the Home Improvement Guaranty Fund, and conducts disciplinary proceedings for all contractor trades statewide.

Official portal: https://portal.ct.gov/DCP
Address: 450 Columbus Boulevard, Suite 901, Hartford, CT 06103
Phone: (860) 713-6135

Who May Apply

To qualify, an applicant must have reached age 18 and hold a valid Social Security Number. No Connecticut residency requirement.

Good moral character

DCP reviews criminal history. DESPP separately disqualifies alarm applicants with felony convictions involving moral turpitude under §29-156g.

Background investigation

DCP requires criminal disclosure on the trade application. DESPP requires fingerprint-based State Police and FBI background checks for the Alarm Company qualifying agent and every employee installer.

Required Experience and Education

Plan to substantiate 4 years of C-5 / C-6 journeyperson: 8,000 hours of supervised experience (approximately four years) under an L-5 / L-6 contractor plus 720 hours of approved classroom instruction in a Connecticut-registered apprenticeship under §20-334. L-5 / L-6 contractor: two years as an active C-5 / C-6 journeyperson plus passing the contractor exam. with hard records. Payroll, tax, project logs, and supervisor verification are what the board relies on when it reviews the claim.

Accepted proof of experience or eligibility

Connecticut Department of Labor apprenticeship completion certificate
DCP Experience Verification Form signed by each supervising L-5 / L-6 contractor
W-2 statements covering the qualifying period
DESPP fingerprint cards for the Alarm Company endorsement
NICET Fire Alarm Systems Level II certificate (recommended)

Education substitution

Completion of an approved Connecticut limited electrical apprenticeship is the standard path to C-5 / C-6. Out-of-state apprenticeships and accredited electrical / electronics technology degrees may be evaluated for partial hour credit by DCP.

Examination Requirements

Prometric under contract to Connecticut DCP. runs the examination for this credential. Issuance is contingent on passing every part below:

Prometric Connecticut C-5 / C-6 Journeyperson examination — open book, NEC and Connecticut amendments — 80 questions, 240 minutes, passing score 70%
Prometric Connecticut L-5 / L-6 Contractor examination — business, law, and supervisory rules — 50 questions, 120 minutes, passing score 70%

Examination fee: $90 examination fee per part to Prometric.

Retake policy: Failed parts may be re-taken after 30 days by paying a new $90 fee. Each application file remains active for one year.

Insurance and Financial Requirements

The cited materials impose no contractor license bond for this credential. Bear in mind that specific contracts, permits, or public works can still require their own bonds.

General liability

DCP requires every L-5 / L-6 contractor to maintain a minimum $500,000 commercial general liability and $100,000 property damage policy under §20-341gg. DESPP requires Alarm Companies to maintain minimum $300,000 combined liability under §29-156g.

Workers' compensation

Workers' compensation is mandatory under Conn. Gen. Stat. §31-275 for any Connecticut employer.

Additional financial requirements

DCP and DESPP do not require a financial statement.

Licensing Fees

Fee	Amount
Application (non-refundable)	$150
Examination	$90
Initial license	$150
Renewal (every year)	$150

Keeping the License Current

Renewal of the Connecticut L-5 / L-6 Limited Electrical Contractor and C-5 / C-6 Journeyperson comes due every year. As cited, the renewal fee stands at $150. L-5 / L-6 renews annually on December 31. C-5 / C-6 journeyperson licenses renew on the same cycle. DESPP Alarm Company renews biennially.

Continuing education: DCP requires continuing education hours per renewal cycle as set by board rule, typically including a code update module. DESPP Alarm Company qualifiers must complete approved continuing training each renewal cycle.

Downloadable Asset

2026 Connecticut Low Voltage License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity and License Transfer

The NASCLA Accredited Examination is not accepted by Connecticut for this classification.

Reciprocal State	Accepted Exam	Conditions
Massachusetts	Limited reciprocity	DCP and the Massachusetts Board of State Examiners of Electricians have a case-by-case reciprocity for active limited electrical journeypersons.
New Hampshire	Limited reciprocity	DCP and NH Electricians Board case-by-case journeyperson recognition.

Connecticut has limited bilateral reciprocity with neighboring New England states. DESPP Alarm Company licenses are not reciprocal.

Weighing more than one jurisdiction? The national hub compares Low Voltage license requirements in every state — exam, bond, fee, and experience thresholds side by side.

Application Process, Step by Step

Choose L-5 or L-6. L-5 / C-5 covers low-voltage signaling, communication, sound, intercom, and fire alarm wiring up to 50 V. L-6 / C-6 covers security, fire alarm, and intrusion detection. Many businesses hold both.
Complete a Connecticut limited electrical apprenticeship. Register with the Department of Labor and accumulate 8,000 hours plus 720 classroom hours under an L-5 / L-6 contractor.
Pass the Prometric C-5 / C-6 Journeyperson examination. Score 70% on the open-book Prometric exam. Receive the journeyperson license.
Work two years as an active C-5 / C-6 journeyperson. DCP requires two years of post-license journeyperson experience before sitting the L-5 / L-6 contractor exam.
Pass the Prometric L-5 / L-6 Contractor examination. Score 70% on the contractor exam covering business, law, and supervisory rules.
File the DCP contractor license application. Submit the application with the $150 fee, $500,000 general liability certificate, and workers comp coverage.
Apply for DESPP Alarm Company license (if doing alarm work). File the DESPP application with the $200 fee, qualifying agent fingerprint cards, and proof of $300,000 liability.
Receive credentials and renew on schedule. DCP licenses renew annually on December 31; DESPP renews biennially.

Document Checklist

These are the pieces to lock down before filing with DCP:

☐ Connecticut Department of Labor apprenticeship completion certificate
☐ C-5 / C-6 journeyperson license (prerequisite to L-5 / L-6)
☐ Two years of post-journeyperson experience
☐ Prometric L-5 / L-6 Contractor exam pass at 70%
☐ DCP contractor application with $150 fee
☐ $500,000 commercial general liability certificate
☐ DESPP Alarm Company license (if doing alarm work)
☐ State Police / FBI fingerprint cards (DESPP)

Recommended References

The references below are either cited by the board, used during the application, or standard preparation for the trade. They are listed purely for convenience — CLR earns no commission on any of them.

National Electrical Code (NFPA 70), Connecticut-adopted edition — NFPA. Open book at the C-5 / C-6 and L-5 / L-6 exams.
Connecticut State Building Code amendments to NEC — Connecticut DCP. Required reference for both the journeyperson and contractor exams.
NFPA 72 — National Fire Alarm and Signaling Code — NFPA. Required reference for L-6 / C-6 fire alarm work.

Frequent Application Errors

Working from the cited board instructions, here are the snags most likely to trip up a Connecticut Low Voltage filing.

Treating L-5 as covering security

L-5 does not authorize burglar alarm or intrusion detection. Security work requires the L-6. Operating outside scope is grounds for license revocation under §20-341gg.

Skipping the DESPP Alarm Company license

DCP L-6 alone does not authorize the business of selling or monitoring alarm services. DESPP licensing under §29-156g is independent and required for any alarm sales or monitoring contract.

Bypassing the apprenticeship

DCP requires a Connecticut Department of Labor-registered apprenticeship for first-time C-5 / C-6 applicants. Self-claimed experience without an apprenticeship is rejected.

Missing the December 31 renewal

DCP renews on December 31 every year. Late renewals trigger a 10% surcharge and a 30-day suspension if not corrected within 90 days.

Overlooking the two-year journeyperson requirement

DCP requires two years of post-journeyperson C-5 / C-6 experience before the L-5 / L-6 contractor exam. Many candidates apply too early and are rejected.

Other Connecticut Trade Licenses

Should the Low Voltage path not apply, these other Connecticut trade guides from CLR may help:

Questions Applicants Ask

What is the difference between L-5 / C-5 and L-6 / C-6?

L-5 / C-5 covers low-voltage signaling, communication, sound, intercom, and fire alarm wiring up to 50 V. L-6 / C-6 covers security, fire alarm, and intrusion detection systems including monitored CCTV.

Do I need both DCP and DESPP licensing for an alarm business?

Yes. The DCP L-6 license covers the installation work; the DESPP Alarm Company license covers the business of selling and monitoring alarm services. Most full-service alarm businesses hold both.

How long is the Connecticut apprenticeship?

8,000 hours of supervised work plus 720 hours of approved classroom instruction (approximately four years) registered with the Connecticut Department of Labor.

Does NICET certification waive the C-5 / C-6 exam?

No. NICET Fire Alarm Systems Level II is widely recognized for fire alarm acceptance testing but does not substitute for the DCP journeyperson exam.

How often does the L-5 / L-6 license renew?

Annually on December 31. Renewal requires proof of insurance and continuing education hours per DCP rule.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-05-26 · Next scheduled review 2026-08-24