A. Audible alarm systems shall be equipped with a timing mechanism that will disengage the alarm annunciator after a maximum period of 20 minutes. Audible alarms without such timing mechanisms shall be unlawful in the City and must be disconnected by the user within 90 days from the effective date of this chapter.
B. Every alarm system installed shall consist only of equipment that is listed by Underwriter's Laboratories, Inc., as being electronically safe and meeting the City's requirements for the alarm system. Wiring for the alarm system must conform with all applicable City codes.
C. Every system installed shall be provided with standby battery power which shall automatically and immediately take over in the event of a power failure.
D. Every system installed shall be done with equipment in such a way as to neutralize electrical surges on the alarm system.