Click on the screenshot thumbnails for larger image and more info about each electrical calculator.
This is digital version of the most frequently used ampacity tables that you would find in Electrical Codes - Canada's CEC and U.S.'s NEC. Look up the right values and apply correction factors quickly. It takes less space on screen than would the paper version on your desk. It's only a click away and it's free. Download.
"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