The 2016 NFPA 72: National Fire Alarm and Signaling Code has the latest provisions for the application, installation, location, performance, inspection, testing, and maintenance of fire alarm and emergency communications systems -- including Mass Notification Systems (MNS). This edition introduces a new circuit designation called Class N pathways permitting the use of networks and Ethernet when interconnecting a fire alarm system. Other changes help you avoid the loss of critical coverage and ensure system interfaces function correctly.