One of the more popular American show-business legends is the one about P.T. Barnum and the egress. In 1841, Barnum launched his American Museum at the corner of Broadway and Ann Street in Lower Manhattan.
Electrical professionals understand that the purpose of a smoke detection and alarm system is generally to provide life safety for building occupants. They also understand that the goal of the fire alarm system is to provide occupants with as much escape time as possible.