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Article: Arc Flash: Why It's a Big Deal.(PQ Feature Story)
- Article from:
- Electrical Contracting Products
- Article date:
- November 1, 2007
CopyrightCOPYRIGHT 2007 Cygnus Business Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Arc Flash: Why It's a Big Deal
By Jerry Reaves
Current limiting fuses can reduce the amount of thermal energy produced during a fault.
Arc flash has become a major concern in electrical safety. NFPA 70E concentrates on it and electrical workers are learning about it. So, what exactly is arc flash and how can it be prevented?
Arc flash is high temperature conductive plasma formed when a short circuit fault occurs between at least two energized conductors. It occurs when a phase-to-phase fault or phase-to-ground fault causes energized conductors to go beyond their rated voltage and current limits. If the protective device allows this ...