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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). Search Amazon for your Electrical ...
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Simplify complex wire ampacity calculations with Cerrowire’s convenient Online Ampacity Calculator. This intuitive calculator takes the guesswork out of electrical code compliance, ensuring you select the right conductor size for your specific application.
The Wire Ampacity Calculator will quickly calculate the maximum allowable current through a conductor based on wire size (AWG or kcmil), wire insulation, conductor type and installation method. Enter the information below to calculate the maximum allowable ampacity for current-carrying conductors.
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.
Ampacity-wise, the 4/0 AWG gauge wire can handle the largest amount of current of any AWG gauge wire. At 75°C, the 4/0 copper wire ampacity is 230 amp (with 195 amps and 260 amps at 60°C and 90°C temperature, respectively). You can consult the electrical wire size chart above to find all this data.
Calculate the maximum allowable wire ampacity for an insulated conductor given its gauge, material, temperature rating, ambient temperature, and conductor count.
1) Current ratings for up to 1000 V , PVC-insulated single and multicore wiring cables, ambient temperature up to 30 oC. Download and print AWG chart. Values for resistance are based on electrical resistivity for copper 1.724 x 10-8 Ω m (0.0174 μΩ m) and electrical resistivity for aluminum 2.65 x 10-8 Ω m (0.0265 μΩ m). prefixes.