11 AWG (American Wire Gauge) wire specifications: 2.3048 mm diameter, 4.1723 mm² area. Resistance, weight, and common uses.
| Diameter | 2.3048 mm · 0.090742" · 90.74 mils |
| Cross-sectional area | 4.1723 mm² · 8,234 circular mils |
| Resistance (copper, 20°C) | 4.132 Ω/km · 1.2594 Ω/1000ft |
| Resistance (aluminum, 20°C) | 6.7738 Ω/km · 2.0647 Ω/1000ft |
| Ampacity — copper 60°C | — A |
| Ampacity — copper 75°C | — A |
| Ampacity — copper 90°C | — A |
| Ampacity — aluminum 75°C | — A |
| Weight (copper) | 37.384 kg/km · 25.121 lbs/1000ft |
| Weight (aluminum) | 11.265 kg/km · 7.57 lbs/1000ft |
| Closest IEC 60228 size | 4 mm² |
| Skin depth at 60 Hz | 8.531 mm |
| Type | Temperature | Description |
|---|---|---|
| THHN/THWN-2 | 90°C dry / 75°C wet | Building wire |
| NM-B (Romex) | 90°C | Residential cable |
| MTW | 60/90°C | Machine tool wire |
| TFFN | 90°C | Fixture wire |
11 AWG copper (2.305 mm diameter, 4.17 mm²) is rarely used in building wiring because 12 AWG and 10 AWG cover the same current range at lower cost and wider availability. It may appear in specialty control cables, military wiring specifications, and some automotive harnesses.
NEC Table 310.16 does not list 11 AWG explicitly. Interpolating between 10 AWG (30 A at 75°C) and 12 AWG (25 A at 75°C), 11 AWG copper would carry approximately 25–30 A. Since it is not a standard building-wire size, NEC ampacity derating and breaker-sizing rules do not directly address it.