There have been survivability requirements in NFPA 72, National Fire Alarm and Signaling Code, since the 1999 edition. The primary purpose is to enable certain circuits to maintain their ability to operate for an extended time during a fire emergency.
When it comes to transformative change in society, government is often the catalyst. The transition to a more energy-efficient landscape is no exception. According to a new ranking of energy innovation, America’s biggest cities are leading the way.