Eh, curse my luck, it's a UFC Requirement specific to DoD ADP areas, communication centers, command and control systems, and other mission critical systems.

http://www.wbdg.org/ccb/DOD/UFC/ufc_3_600_01.pdf
Quote
UFC 3-600-01 6-8.1.1 Automatic Sprinkler Protection

Electronic equipment installations must be located in buildings protected by wet-pipe automatic sprinklers. Provide complete coverage throughout the building including electronic equipment areas. Protect electrical equipment installations by disconnecting the power upon activation of the fire protection system.