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Industrial Automation & Information Systems since 1986

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Calculating ampacity in small-gauge, electrical cables

This paper explores an analytical method developed during the course of a forensic engineering examination of an electrical fire fatality.

Abstract—Guidance for predicting the ampacity of small-gauged conductors is not readily available and not addressed in the authoritative National Electric Code. While the Code and manufacturers provide definitive tables of ampacities, an analytical method is helpful. Increasingly, reliability and safety personnel are interested in ampacities of appliance and extension cords. The interest may be the result of product design, insurance, legal or forensic involvement. Because fire is a potential result, the First Law of Thermodynamics is an excellent starting point for a useful analytical tool.

WheelWatcher Application Note

  How off-the-shelf components combined with excellent software craftsmanship yielded a world-class, wireless data acquisition system with microsecond sampling.


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