Wire Ampacity Reference Chart
Reference chart for AWG wire gauge ampacity ratings. Find maximum current capacity for copper and aluminum wires.
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| AWG | Dia (mm) | Area (mm2) | Cu 60C | Cu 75C | Cu 90C | Al 75C | Common Use |
|---|---|---|---|---|---|---|---|
| 14 | 1.628 | 2.08 | 15A | 20A | 25A | 15A | Light fixtures, 15A circuits |
| 12 | 2.053 | 3.31 | 20A | 25A | 30A | 20A | Kitchen outlets, 20A circuits |
| 10 | 2.588 | 5.26 | 30A | 35A | 40A | 30A | Dryers, water heaters, 30A circuits |
| 8 | 3.264 | 8.37 | 40A | 50A | 55A | 40A | Ranges, large appliances |
| 6 | 4.115 | 13.3 | 55A | 65A | 75A | 50A | Subpanels, A/C units |
| 4 | 5.189 | 21.2 | 70A | 85A | 95A | 65A | Feeders, large motors |
| 3 | 5.827 | 26.7 | 85A | 100A | 115A | 75A | Feeders |
| 2 | 6.544 | 33.6 | 95A | 115A | 130A | 90A | Subpanels, feeders |
| 1 | 7.348 | 42.4 | 110A | 130A | 145A | 100A | Service entrance |
| 1/0 | 8.252 | 53.5 | 125A | 150A | 170A | 120A | Service entrance |
| 2/0 | 9.266 | 67.4 | 145A | 175A | 195A | 135A | 200A service |
| 3/0 | 10.404 | 85.0 | 165A | 200A | 225A | 155A | 200A service |
| 4/0 | 11.684 | 107.2 | 195A | 230A | 260A | 180A | 200A+ service |
Temperature Ratings
- 60C (140F): TW, UF - standard insulation
- 75C (167F): THW, THWN, XHHW - most common residential
- 90C (194F): THHN, THWN-2, XHHW-2 - high-temp rated
About Wire Ampacity
Ampacity is the maximum current a wire can safely carry. It depends on wire gauge (AWG), material (copper vs aluminum), and insulation temperature rating. Always consult NEC code for your installation.
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Disclaimer: This tool is provided as-is for informational and educational purposes only.