For UL Certification, how often must a residential burglar alarm system be inspected by the alarm company?

• A. At least once a year
• B. Every two years
• C. Every six months
• D. Monthly

Answer: (A)

UL Certification for residential burglar alarm systems requires the alarm company to inspect the system at least once a year. This annual check keeps the listing valid and ensures reliability by verifying that all parts—control panel, keypad, sensors, door/window contacts, motion detectors, backup batteries, tamper switches, and the communication path to the monitoring center—are functioning correctly. Regular annual inspections catch wear, wiring issues, battery degradation, or misconfigurations before they cause false alarms or failures when an alarm is needed. That’s why the best choice is the one indicating at least annually.

Frequent checks like monthly are more than what UL requires and can be unnecessarily burdensome, while six months is more frequent than needed for UL maintenance, and two years is too long to risk noncompliance and potential system unreliability.