Click on the screenshot thumbnails for larger image and more info about each electrical calculator.
MC Group Inc. develops software tools to accelerate calculations frequently performed by electrical engineers and contractors. These calculators have built in formulas and tabulated values that save you hours of time spent finding required information.
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"Electrical Calculator proves to be a useful and reliable application whose main purpose is to provide electrical engineers with the right tools when calculating the secondary transformer voltage and the transformer impendence coefficients." – Softpedia
"NEC Ampacity Calculator is an efficient piece of software ... dedicated to users that have an idea about electrical systems." – Softpedia