Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Bureau of Fire Services
Adult Foster Care Facilities
Part 7 - AMENDMENTS TO THE STANDARD FOR THE INSTALLATION, MAINTENANCE, AND USE OF HOUSEHOLD FIRE WARNING EQUIPMENT (NFPA 74, 1989 EDITION, NATIONAL FI RE PROTECTION ASSOCIATION)
Section R. 400.18701 - Power supplies

Rule 701. Section 3-1.1.1 of the standard is amended, section 3-2.3 of the standard is deleted, and section 3-5is added to the standard, to read as follows:

3-1.1.1. For electrically powered detectors, an AC primary power source shall be utilized in all new and existing construction.

3-2.3. Deleted.

3-5. A secondary source of power is required and it shall be of sufficient capacity to operate the system for 24 hours and thereafter to sound alarm devices for not less than 4 minutes. A distinctive trouble signal shall be given before the secondary power supply is incapable of operating the equipment for alarm purposes.