How to Perform an Arc Flash Study – Part 3
Arc Duration: Time is everything when an arc flash occurs. The longer the duration, the greater the incident energy exposure – which is directly proportional to the duration. The 2018 Edition of IEEE 1584 defines the arc duration , also referred to…
How to Perform an Arc Flash Study – Part 2
Arcing Fault Current: Arcing Fault Current – Effect of Gap, Voltage and Electrode Configuration An arc flash occurs when short circuit current jumps across an air gap between energized conductors. The event is normally the result of initial (and inadvertent) contact between energized…
How to Perform an Arc Flash Study – Part 1
Based on the Latest Edition of IEEE 1584: What is an arc flash study sometimes known as an arc flash assessment? Performing an arc flash analysis can be complex enough but the latest edition of IEEE 1584 – IEEE Guide for Performing Arc-Flash Hazard Calculations has taken it…
Warning! No Arc Flash Hazard Exists!: I’m sure that title raised a few eyebrows but before you send me an email telling me how I got this wrong, hang in there for the rest of the thought. I receive questions about this phrase on a pretty…
Jim Phillips, P.E. Every three years I have the privilege of writing the NFPA 70E Changes article for National Electrical Contractor Association’s magazine: Electrical Contractor . The NFPA 70E 2021 edition of this standard will be available September 4, 2020…
2021 NFPA 70E – Major Changes By Jim Phillips The 2021 Edition of NFPA 70E is right around the corner and with it – many changes. Every three years I have the privilege of writing about the upcoming changes for…
Rocket Sled that Inspired “Murphy’s Law” OK, not the most professional sounding title for an article about electrical safety. But play along, you will be able to connect the dots rather quickly. Captain Murphy Around seventy years ago, Captain Murphy…
Plasma – Modify the Arc Rating or Modify the Incident Energy Calculations? I am frequently asked questions about the application of the 2018 edition of IEEE 1584 – especially electrode configurations and more specifically, about HCB (Horizontal Conductors/Electrodes inside a…
Case Study – Arc Flash While Switching – Normal Operation?: A common question that I often hear in my NFPA 70E and IEEE 1584 Arc Flash Studies training courses is: “Can simply operating a device such as a fusible switch or circuit breaker cause an arc flash?” I respond to…
My 1974 IEEE Gray Book from College – Now part of the 3000 Series of IEEE Standards I have been a fan of the IEEE “Color Books” going all the way back to my Senior Year in college – yep,…
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