13 AWG (American Wire Gauge) wire specifications: 1.8278 mm diameter, 2.624 mm² area. Resistance, weight, and common uses.
| Diameter | 1.8278 mm · 0.071962" · 71.96 mils |
| Cross-sectional area | 2.624 mm² · 5,178 circular mils |
| Resistance (copper, 20°C) | 6.5702 Ω/km · 2.0026 Ω/1000ft |
| Resistance (aluminum, 20°C) | 10.7708 Ω/km · 3.283 Ω/1000ft |
| Ampacity — copper 60°C | — A |
| Ampacity — copper 75°C | — A |
| Ampacity — copper 90°C | — A |
| Ampacity — aluminum 75°C | — A |
| Weight (copper) | 23.511 kg/km · 15.799 lbs/1000ft |
| Weight (aluminum) | 7.085 kg/km · 4.761 lbs/1000ft |
| Closest IEC 60228 size | 2.5 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 |
13 AWG copper (1.828 mm diameter, 2.62 mm²) is not a standard building-wire size. It is occasionally found in European appliance cords adapted for North American plugs, speaker wire, and some thermostat cables. Its ampacity falls between 14 AWG (15 A circuit) and 12 AWG (20 A circuit).
NEC Table 310.16 does not list 13 AWG explicitly. Based on its cross-section (2.62 mm²), its ampacity falls between 14 AWG (20 A at 75°C) and 12 AWG (25 A at 75°C), roughly 18–22 A for copper at 75°C. It cannot be used on a standard 20 A branch circuit because it is not a recognized building-wire size under NEC.