7.9.2.4 Emergency generators providing power to emergency
lighting systems shall be installed, tested, and maintained in
accordance with NFPA 110, Standard for Emergency and Standby
Power Systems. Stored electrical energy systems, where required
in this Code, other than battery systems for emergency luminaires
in accordance with 7.9.2.5, shall be installed and tested
in accordance with NFPA 111, Standard on Stored Electrical Energy
Emergency and Standby Power Systems.