Technical Articles

Technical Articles

Warning! No Arc Flash Hazard Exists!

Warning! No Arc Flash Hazard Exists!

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…

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Jim Phillips in his PPE

2021 NFPA 70E – Major Changes

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…

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Wind and Solar Electrical Safety

DC Arc Flash Calculations

290 MW PV Installation in SW Arizona When the 2018 Edition of IEEE 1584 was published last year, one subject was conspicuously absent – DC arc flash. DC power systems are everywhere and include sources such as rectifiers, photo-voltaic installation,…

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