Click on the screenshot thumbnails for larger image and more info about each electrical calculator.
The versions of the software, dated April 2016 comply with NEC 2017 and CEC 2018.
If upgrading, please read software upgrades instructions.
Electrical_Calculator.zip 1.4MB Freeware (Updated April 2016)
Lighting_Level_Calculator.zip 1.4MB (Updated April 2016)
Voltage_Drop_Calculator.zip 1.4MB (Updated April 2016)
Underground_Ampacity.zip 1.2MB (Updated April 2016)
Conductors_Ampacity_CEC.zip 795kB Freeware (Updated April 2016)
Conductors_Ampacity_NEC.zip 796kB Freeware (Updated April 2016; reflects 2011 NEC)
PC running Microsoft® Windows® 95, 98, ME, 2000, XP, 7, 8, 10 (32/64 bit OS). (As of October 2018)
"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