UL 827

These requirements apply to:

–a) Central-stations providing watchman, fire-alarm, and supervisory services as described in th e National Fire Alarm Code, NFPA 72,

–b) Central-station burglar-alarm systems intended and specifically designated for burglary protection use at mercant ile and banking premises, on mercantile safes and vaults, and on bank safes an d vaults, and

–c) Residential monitoring stations monitoring residential alarm systems.

These requirements apply to central-stations , subsidiary stations and residential monitoring stations that are intend ed to be located in buildings constructed in accordance with building codes, such as the Building Officials and Code Administrators (BOCA) National Building Code, the Standard Building Code, and th e Uniform Building Code.

The central-station burglar- and fire-alarm station and residential alarm systems covered by these requirements are systems in which the operation of electrical protection circuits and devices are signaled automatically to, recorded in, maintained in, and supervised from a central-station or residential monitoring station having trained operators and runners on duty at all times.