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…
Cómo realizar un estudio de arco eléctrico – Parte 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…
Cómo realizar un estudio de arco eléctrico – Parte 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…
Cómo realizar un estudio de arco eléctrico: parte 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…
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