Article 700: Emergency Systems - Understanding the purpose of emergency systems helps you meet their special requirements

摘要

Essentially, emergency systems are lifelines for people, and Art. 700 is all about keeping those lifelines from breaking. The Article's main goal is to keep the emergency operation as reliable as possible. One way to do that is to use inherently safe actuation devices, such as valves that "fail safe" to a predetermined position upon loss of power. Another is to limit what qualifies as an "emergency load," so the emergency system powers only what is needed to save human life (Fig. 1).