77 Ill. Adm. Code 350.3990
Emergency Electrical System
Section 350
Section 350.3990Â Emergency
Electrical System
a)Â Â Â Â Â Â Â Â The facility shall have an emergency electrical service which
shall provide services as follows:
1)Â Â Â Â Â Â Â Â Illumination for means of egress
2)        Fire detection and alarm system (A, B)
b)Â Â Â Â Â Â Â Â Emergency electrical service is not required to provide
lighting for exit signs or a nurses station, nor for providing power to a
communication system, including a nurse's call system.
c)Â Â Â Â Â Â Â Â Facilities of eight beds or less will not be required to
provide emergency electrical service for illumination for means of egress, or
for fire detection and alarm system, in accordance with the provisions of this
Section, if the facility has been inspected by the Office of the State Fire
Marshal and found not to need such an emergency electrical service, as
evidenced by a written report to the Department from the Office of the State
Fire Marshal to that effect.