Wire Ampacity

Calculate wire ampacity on the fly!

Four Calculations In One App
  1. Minimum wire or max amps based on the inputted ampacity for low voltage
  2. Minimum wire or max amps based on the inputted ampacity for medium voltage
  3. Equipment and service ground size
  4. Residential feeder size

Note: The app is called Wire Ampacity and not Circuit Ampacity. This app does not specify the size of an over-current device, simply the AMPACITY of the wire (i.e. #14 75 degree wire has an ampacity of 20A, but should not be used with a 20A breaker).

The calcs are base on the 2008/2011/2014 NEC.