Daily Archives: August 31, 2009

IESO, LLC recently published an arc flash article (http://iesollc.com/wordpress/2009/06/22/arc-flash-safety-history-and-requirements/) on our website.  We continue to recommend the rigorous analysis proscribed by IEEE 1584, and warn against “quickie” or generic solutions.  This safety alert illustrates a real-world example of why that is.

An industrial facility recently asked IESO, LLC to evaluate arc flash results from another consultant who reportedly used a customized program developed in-house.  The facility management team was concerned about the lack of time that the consultant spent on-site (less than five hours), the minimal review of electrical components and the generic results.  Labels for all electrical components were identical whether for buss plugs, MCC panels or substation switchgears, and the facility staff had serious doubts that they got what they paid for.