Fire departments and other code officials are starting to look closely at SLC isolation. The signaling line circuit is the circuit or circuits that connect all of the inputs - detectors, pull stations, modules, etc. - to the control panel. Circuit isolation has been part of the life safe...
I always get a good laugh when I'm watching a movie and they show all the sprinkler heads in a building spraying water all at once. Even better is when they show someone pull a fire alarm pull station and all the sprinklers start spraying. I'll do my best to give the Hollywood writers so...