Which of the following is NOT a common reason for alarm system false alarms?

Proper installation is not a common reason for alarm system false alarms because when an alarm system is installed correctly, it should operate reliably and effectively. Proper installation ensures that all components, including sensors and control panels, are set up according to the manufacturer's specifications and industry standards. This minimizes the likelihood of false alarms caused by misalignment or improper placement of devices.

In contrast, untrained users can often trigger false alarms by misunderstanding how to operate the system or by making mistakes while arming or disarming it. Faulty sensors can malfunction or provide inaccurate readings, which may lead to false alarms. Environmental interference, such as changes in weather or unexpected movement from pets, can also cause alarm systems to activate erroneously. These factors contribute to the prevalence of false alarms, while proper installation serves as a foundational element that supports the overall effectiveness and reliability of the security system.