Past – Present – Future
By Jim Phillips, P.E.
Blog #1: What is Forensic Electrical Engineering?
Welcome to my 3-part blog series about the Past, Present and Future of Forensic Electrical Engineering. In this blog series, you’ll get insights into what can be considered some of the first forensic investigations into electrical engineering. Beginning way back in the 1700s with the study of lighting and “bell ringers” up to today’s investigations using elaborate computer simulations to recreate events. Welcome back each week to digest the next bit of insight, data and information.
By Jim Phillips
Performing electrical work without being properly trained can be deadly. I have seen this hold true during numerous investigations.
Many companies proactively provide employee training and refresher courses at least every 3-years. Some companies use shorter intervals for refresher training. However, for others, training is not thorough or a low priority. Some simply just want to check training off their to-do lists without much regard to safety for self or employees. In the end, does it matter? Continue reading
Finally! The 40 cal/cm2 threshold my finally be deleted.
The For many years, the 40 cal/cm2 threshold that is part of Informational Note 3 presently found in the 2015 Edition of NFPA 70E Section 130.7(A) has been the subject of constant debate. Continue reading
Webinar – Utility Short Circuit Current Data, Arc Flash Studies and Change
by Jim Phillips, P.E.
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It goes up, it goes down, sometimes it is thought to be infinite (although it really isn’t!) and other times it seems impossible to find. “It” refers to the available short circuit current from the electric utility which is one of the more important pieces of information for an arc flash hazard calculation study. Used to help define the severity of an arc flash hazard, it represents the magnitude of current that could f
low from the electric utility during a short circuit. Continue reading
With the 2015 Edition of NFPA 70E being published and all of the changes that it brings, it is time to review your arc flash study, labels and overall practices. There are many key areas that should be evaluated. Here ten of the more important areas to look at to give your site a check up. Continue reading
An arc flash study can be a bit complicated if you are new to this field. Knowing where to begin, what to include, how far to go, how to use the software etc. can seem like an insurmountable undertaking. WORSE – you are going to contract the study and don’t know what to ask for. The good news, there are many well qualified consultants that can help guide you through the process. The bad news – there are plenty of people ready to take advantage of the situation once they realize this might be your first study. Continue reading
“Raise your right hand” Pretty intimidating words – especially if they are said in a court room and the trial is about an injury or death. – and you are on the wrong side of what happened. Let’s face it in the litigious society that we have in the United States, it seems anytime there is an accident where there is a significant economic loss, personal injury or worse – someone died, there will almost certainly be legal actions. Continue reading
NFPA 70E – Standard for Electrical Safety in the Workplace, was first published in 1979 and consisted of only one part, The 2015 Edition marks the tenth edition to NFPA 70E and with it, many sweeping changes. This article provides a review of the major changes to the latest edition of this important electrical safety standard. Continue reading
The surface area of the earth is approximately 197 million square miles, and IEEE 1584—IEEE Guide for Performing Arc-Flash Hazard Calculations has been covering more of it every day since it was first published almost 11 years ago. Although the IEEE 1584 standard has its roots in the United States, it has gained widespread international use as the most common method for performing arc flash calculation studies. Continue reading
IEEE 1584 – Where It All Began – 2002
A lot has happened since 2002 when IEEE 1584 – IEEE Guide for Arc-Flash Hazard Calculations was first published. The development of this land mark document included conducting over 300 arc flash tests which were used to create the empirically derived equations. Applicable for three phase calculations and voltages ranging from 208 volts to 15,000 volts, four main calculation Continue reading