Printable Wire Ampacity Chart
This one-page letter PDF is for electricians, installers, and DIY users who need a quick reference for conductor ampacity. It shows NEC 310.16-based ampacity for wire sizes 14 through larger common sizes, with columns for Size, Cu 60°C, Cu 75°C, Cu 90°C, Al 60°C, Al 75°C, and Al 90°C. The table includes sample ratings such as 14 AWG, 12 AWG, and 10 AWG, along with notes for not more than 3 current-carrying conductors and 30 °C ambient.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 105 KB
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Use the chart to compare copper and aluminum ampacity at the insulation temperature rating that matches your wire. Check the conductor size, then read across to the correct material and temperature column. Always verify the final selection with the adopted code edition before installing or sizing a circuit.
Good for
- Quick wire size checks
- Compare copper and aluminum ratings
- Reference for panel and branch circuit sizing
Tip: Print it at full size so the temperature columns stay easy to read.
5 files · PDF, XLSX, DOCX
Get every sheet: Wire Ampacity Charts & Calculator
This sheet plus 5 more in one download, with the editable Excel and Word files. Printable copper and aluminum ampacity chart, correction and bundling factor sheet, an Excel corrected-ampacity calculator, a voltage drop worksheet and a circuit schedule template.
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