Electrical

The answer depends on the building laws in effect now and at the time the building was constructed. For example in locations that adopted the International Building Code 2006 version-
Rooms or Areas with stationary storage battery systems having a liquid capacity of more than 100 gallons used for facility standby power, emergency power or uninterrupted power supplies are required to be separated from Group E (educational) Occupancies by a fire barrier with a 2-hour fire-resistive rating.
Small electrical rooms with distribution panels do not typically require one-hour construction. As the increasing requirements for automatic sprinkler protection increase the number of locations that require the fire-rated construction decreeases.
In the National Electrical Code (NFPA 70) vaults containing conductors and equipment over 600 volts are required to have walls, roofs, floors and doorways with a minimum of 3-hour fire-resistive construction.
In the National Electrical Code (NFPA 70) dry-type transformers of more than 112-1/2 kVA installed indoors shall be separated from the rest of the building by one-hour fire-rated construction.
In the National Electrical Code (NFPA 70) rooms with Information Technology equipment shall be separated from the rest of the building by fire-resistant-rated walls, floors, and ceilings.
In the National Electrical Code (NFPA 70) wiring for emergency systems shall be protected by an automatic sprinkler system or one-hour fire-resistive construction.
In the National Electrical Code (NFPA 70) Equipment for sources of power as described in 700.12(A) through (E) where located within buildings above 23 m (75 ft) in height with any of the following occupancy classes — educational shall be installed either in spaces fully protected by approved automatic fire suppression systems (sprinklers, carbon dioxide systems, and so forth) or in spaces with a 1-hour fire rating.