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Technical Articles

PPE

Non-melting clothing

December 16, 2016

Our company in the past 2 years has implemented an electrical safety and control of hazardous energy program for employees world-wide. Our daily work-wear clothing minimum requirement is non-melting clothing, except in US and Canada for which our AFHA’s determine minimum PPE requirements. Unfortunately, many countries have yet to recognize arc flash is a real threat to people and arc flash isn’t isolated to just North America. (Good news is they are beginning to wake up!) As the implementation project

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Behavior of Apparel Fabrics During Convective and Radiant Heating

December 14, 2016

Personal protective equipment (PPE) recommended for arc flash is not always designed for arc flash exposure. The purpose of this paper is to warn of the dangers posed by using the improper materials in arc flash exposures until standards have caught up on this issue. The table below shows a representative range of everyday textiles along with some of the measurements of importance in establishing their response towards convective and radiant heating[1]:   Times to ignition or melting of the

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Racking in medium voltage breakers – does this exist?

August 10, 2016

The question of the week on racking in medium voltage breakers got me thinking about this video: https://www.youtube.com/watch?v=rdQR7-Ap6YQ and what else could be done to prevent it from happening again. Yes, I know the guy was wearing insufficient PPE and should have had the door closed. I also know that in our newer gear where I work we have remote remote racking operators, fiber optic flash detection and tripping and the gear is designed differently to contain or re-direct an

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PPE Selection when Interacting with non-labeled Equipment

August 1, 2016

Hi All, To put my question in context, I train Industrial Maintenance and Construction Electricians at a Community College. Some of the students are new to the field and are receiving training to gain employment. Many of the students are already employed and are taking classes to enhance their skill set. Many of these folks are involved with service work that takes them to a variety of locations from 7-11s to industrial sites. Where I am troubled is how to

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