Electrical Design and CYA – “Suspected” Electrical Fire Fire Scene Examination Report I’m sure you have heard the acronym CYA before. Cover your…. I mentioned CYA quite a bit in my 32-hour Power System Engineering class. We discuss many design…
Safety by Design: A Technique That Incorporates Hazard Analysis and Risk Assessment Most electrical power systems are considered “legacy” systems, meaning they are older and may not utilize the latest technologies. In contrast, newer systems often adopt a design strategy…
Date on the Arc Flash Label? A common question that I receive during both my NFPA 70E and Arc Flash/IEEE 1584 classes: Is the date required to be the arc flash (equipment) label? Two standards can provide insight into the…
Arc Flash Studies – Confused? It has been over 20 years since IEEE 1584, IEEE Guide for Performing Arc-Flash Hazard Calculations turns was first introduced to the world on September 23, 2002. All these years later there can still be…
Jim Phillips, P.E. 2024 NFPA 70E Changes and Refresher Training Register for Jim Phillips’ 8 Hour 2024 NFPA 70E Changes and Refresher Training! February 13 – 14, 2024 April 24 – 25, 2024 July 10 – 11, 2024 2024 NFPA…
2024 NFPA 70E Update Jim Phillips, P.E. The 2024 Edition of NFPA 70E: Standard for Electrical Safety in the Workplace is scheduled to be published later this year. First released in 1979, this will mark the thirteenth edition. While some…
Electric Current through Tissue and Air Shock and Arc Flash Hazards Figure 1: Absence of voltage tester | Panduit Corp. Basic electrical theory is that the greater the load is, the greater the current. Normally, the current flows through conductors…
2022 IEEE 1584.1 Just Published!: I’m happy to announce the latest Edition of IEEE 1584.1 “IEEE Guide for the Specification of Scope and Deliverable Requirements for an Arc-Flash Hazard Calculation Study in Accordance with IEEE Std 1584” was just published. The working group informally refers…
How to Perform an Arc Flash Study – Part 5 Incident Energy and Arc Flash Boundary Calculations: The final part of this series examines incident energy and arc flash boundary calculations for the 480V panelboard example used in this series. IEEE 1584—IEEE Guide for Performing Arc Flash Hazard Calculations defines incident energy as, “The amount of thermal…
The duration of an arc flash is typically defined by how long it takes an upstream overcurrent device to operate and clear the fault. This requires using the device’s time current characteristic (TCC), which is based on the specific device…
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