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ATTACHMENT C 1708 occupancies, Ssingle-station smoke alarms shall receive their primary power from the 1709 building wiring provided that such wiring is served from a commercial source and shall 1710 be equipped with a battery backup. Smokealarmswithintegralstrobesthatarenotequipped 1711 with battery backup shall be connected to an emergency electrical system. Smoke alarms shall 1712 emit a signal when the batteries are low. Wiring shall be permanent and without a 1713 disconnecting switch other than as required for overcurrent protection. 1714 Exceptions: 1715 1. Smoke alarms are permitted to be solely battery operated in buildings where no 1716 construction is nottaking place,. 1717 2. Smoke alarms are permitted to be solely battery operated in buildingsthat are 1718 not served from a commercial power source. 1719 3. Smoke alarms are permitted to be solely battery operated and in existing areas 1720 of buildings undergoing alterations or repairs that do not result in the removal of 1721 interior wall or ceiling finishes exposing the structure, unless there is an attic, 1722 crawl space or basement available which could provide access for building 1723 wiring without the removal of interior finishes. 1724 10. Interconnection. Where more than one smoke alarm is required to be installed within an 1725 individual dwelling or sleepingunit, in Group R-2, R-3, R-4 and in dwellings not 1726 regulated as Group R occupancies, the smoke alarms shall be interconnected in such a 1727 manner that the activation of one alarm will activate all of the alarms in the individual 1728 unit. Physical interconnection of smoke alarms shall not be required where listed wireless 1729 alarms are installed and all alarms sound upon activation of one alarm. The alarmshall 1730 be clearly audible in all bedrooms over background noise levels with all intervening 1731 doors closed. 1732 Exceptions: 1733 a. Interconnection is not required in buildings which are not undergoing alterations, 1734 repairs, or construction of anykind. 1735 b. Smoke alarms in existing areas are not required to be interconnected where alterations 1736 or repairs do not result in the removal of interior wall or ceiling finishes exposing the 1737 structure, unless there is an attic, crawl space or basement available which could provide 1738 access for interconnection without the removal of interiorfinishes. 1739 11. Smoke Detection System.Smoke detectors listed in accordance with UL 268 and provided as 1740 part of the building's fire alarm system shall be an acceptable alternative to single- and multiple- 1741 station smoke alarms and shall comply with the following provisions of the Minnesota State Fire 1742 Code: 1743 a. The fire alarm system shall comply with all applicable requirements of the 1744 Minnesota State Fire Code. 1745 b.Activation of a smoke detector in a dwelling or sleeping unit shall initiate alarm notification 1746 in the dwelling or sleeping unit. 1747 c. Activation of a smoke detector in a dwelling or sleeping unit shall not activate alarm 1748 notification appliances outside of the dwelling or sleeping unit, provided that a supervisory 1749 signal is generated and monitored. 1750 12. Testing And Maintenance.Single and multiple-station smoke alarms shall be tested and 1751 maintained in accordance with the manufacturer's instructions. Smoke alarms that do not 1752 function shall be replaced. Smoke alarms installed in one and two-family dwellings shall be 39