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The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 Volts, 60°C through 90°C (140°F through 194°F), not more than three current-carrying conductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30°C (86°F).
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About - Wire Size Chart and Maximum Amp Ratings - Wire Size...
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This site offers many simple-to-use calculators and wire ampacity charts to aide you in properly sizing wire and conduit in compliance with the NEC. Visit the Calculators and Tables pages for a complete list of resources.
Calculate the maximum allowable wire ampacity for an insulated conductor as directed by the most recent NEC ampacity tables and charts.
To calculate wire size, you will need to use ampacity and NEC 80% rule. We will show you how to easily calculate wire size by hand, using a wire gauge calculator , and at the end, you will also find a complete chart of what size wire you need for how any amp service.
120/240 volt, 3 wire, single phase service-entrance conductors, service lateral conductors and feeder conductors that serve as the main power feeder to a dwelling unit and are installed in raceway or cable with or without an equipment grounding conductor. For application of this section, the main
This app uses the calculation requirements found in the 2017 National Electrical Code® to determine the ampacity of insulated conductors and certain cable-type wiring methods. This calculator also complies with the 2020 NEC requirements.
The Advanced Wire Ampacity Calculator will calculate the maximum ampacity for a wire based on wire gauge, preferred (or available) wire insulation, conductor type and installation specifications.