Joseph Weigel, Square D Services, Schneider Electric
An arc flash analysis (sometimes referred to as a flash hazard analysis) is a thorough and careful mathematical model of a facility’s electrical power distribution and control system. The purpose of this electrical system study is to determine as accurately as possible how the electrical system will respond to faults that might occur at various points within the system.
One of the critical steps to comply with NFPA 70E 2004 is commissioning a flash hazard analysis for your facility. This requirement affects almost all existing facilities that have electrical distribution systems that operate at 50 V or greater, which at some time may require maintenance or even a lockout/tagout procedure while the equipment is energized.