Simplifying NFPA 70E compliance for thousands of simple facilities

Abstract

Compliance with the arc flash labeling requirements of NFPA 70E is challenging when applied to thousands of simple facilities due to the need for accurate data collection, site-specific analysis, and meticulous labeling. Each utility power service is unique, and the system rigidity, transformer size, and primary fusing are all under the utility's control - subject to change without notice. However, by utilizing a conservative approach centered on a few key variables, it is possible to produce a few simple charts applicable to the vast majority of these installations, empowering field operations personnel to assess arc flash hazards with confidence, to mitigate hazards where possible, and to take the lead in the effort to establish a safer working environment.