Artículos técnicos

Electrical Safety Codes and Standards

Fig. 4 Staged Arc Flash Test

Impedancia de secuencia cero y energía incidente

Zero-Sequence Impedance and Incident Energy: A question that I am often asked either on-line or in one of my arc flash training classes is in regards to incident energy calculations and line-ground short circuit current: “Since it is possible for the line-to-ground short circuit current…

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Actualización de las normas IEEE e IEC

By Jim Phillips March has been a busy month for me with Standards Committee work. I just returned home from three weeks of travel that included IEEE Standards meetings in Ft. Worth, Texas and various IEC meetings held at British…

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NFPA 70E Annexes

Anexos informativos de la norma NFPA 70E de 2018

Almost half of the pages in the 2018 edition of NFPA 70E are devoted to 17 informative annexes. Even though technically the annexes are not part of the mandatory text, there is an incredible amount of additional information, examples and…

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Earth at Night

Uso global de la norma IEEE 1584

Global Use of IEEE 1584: IEEE 1584 – It’s a Small World The world’s electrical systems do not discriminate when it comes to electrical safety. Electric shock, electrocution and arc flash hazards can occur anywhere on the planet that has electricity. An interesting side note…

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