Printable Wire Correction Factors Chart
This one-page Letter PDF is for electricians, installers, and anyone checking wire ampacity in warmer spaces or bundled runs. It shows correction and adjustment factors in a clear table with columns for Condition, 60 °C, 75 °C, and 90 °C. The listed rows include ambient temperature ranges such as 31–35 °C, 36–40 °C, and 41–45 °C, with matching factor values for each temperature rating.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 104 KB
Free for personal, family and classroom use.
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Use the table to find the right factor for the ambient condition or bundling situation, then apply that value to the ampacity rating for the wire size and insulation temperature. Keep it with job notes, panel schedules, or field calculators so the correction is easy to check during planning and installation.
Good for
- Check ampacity in higher ambient temperatures
- Apply bundling adjustment factors on site
- Keep with panel and load calculations
Tip: Print at full size so the temperature rows and decimal values 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.
$7.00 USD, one-time 5 files · about $1.40 each
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