A fire alarm system can shareThis requires the approval of the authority having jurisdiction. any of its wiring, components,equipment or circuits with anything that is not fire alarm system related.  Limitations on what can be combined with a fire alarm system are typically limited by the equipmentThere are some things that don't make sense to combine with the fire alarm system. The technology will allow it, but costs and usability make it prohibitive. Things like time clocks, and building temperature and lighting controls are good examples of systems that work better without any fire alarm system intervention. used. 

If a system is not compatible and will cause issues with the handling of a fire alarm system signal, it is not allowed to be combined with the fire alarm system. 

NOTE: This is an unformatted excerpt from our online fire protection training library.