Any alarm system installed in San Francisco after January 30, 1984, shall be supplied with an uninterruptible power supply in such a manner that the failure or interruption of the normal electric utility service will not activate the alarm system. The power supply must be capable of at least four hours of operation.
(Added by Ord. 154-02, File No. 021078, App. 7/12/2002)
(Former Sec. 3705 added by Ord. 524-83, App. 11/4/83; repealed by Ord. 154-02, File No. 021078, App. 7/12/2002)