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Wire Ampacity Chart

Free NEC wire ampacity lookup for DIYers and makers.

Developer tools

Launched 29 Oct 2026

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Wire Ampacity Chart is a free NEC wire ampacity lookup for DIYers and makers. Pick copper or aluminum, AWG size, and insulation temperature rating, then read allowable amps against common Table 310.16 conditions. Built for a quick phone check in the workshop before you buy cable - not a substitute for a licensed electrician or your local AHJ. No account required for the core chart.

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