This Fire Alarm System label has been designed to satisfy the requirements of the British Standards as described below:
BS 5839-1:2017 Clause 25.2f)3) states…
Every isolator and protective device that can isolate the supply to the fire detection and fire alarm system, other than the main isolator for the building and where in the case of any switch that disconnects the mains supply to both the fire alarm system and to other circuits “WARNING. THIS SWITCH ALSO CONTROLS THE SUPPLY TO THE FIRE ALARM SYSTEM”.