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Designing a Site Electrical System With Arc Flash Energy Under 20  \hbox {cal}/\hbox {cm}^{2}

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1 Author(s)
Daniel R. Doan ; DuPont Eng., Wilmington, DE

There have been recent advances in equipment design and arc flash hazard assessment. It is possible to design a complete site electrical system, from transmission to distribution to utilization voltage, with the estimated arc flash energy below 20 cal/cm2 (80 J/cm2) for all equipment. This paper describes a preferred design, where all workers can have proper arc flash personal protective equipment by using single-layer flame resistant everyday clothes and add a single-layer coverall for the higher energy tasks. Inherently safer design is in our future to reduce hazards and keep our workers safe.

Published in:

IEEE Transactions on Industry Applications  (Volume:45 ,  Issue: 3 )