Fire case histories make an argument for requiring survivability of all fire alarm system circuits. A fire occurred in the London Apartments for the elderly in Delaware, Ohio, on March 12, 1994. Manual fire alarm boxes and corridor smoke detectors were connected to the building’s fire alarm system.
Fires and explosions in the workplace result in nearly 200 fatalities and injure some 5,000 workers every year. The resulting costs of such incidents reach more than $2 billion annually.