3/0 AWG wire specifications: 10.4049 mm diameter, 85.0288 mm² area, 165A ampacity (copper, 75°C). Resistance, weight, and common uses.
| Diameter | 10.4049 mm · 0.409642" · 409.64 mils |
| Cross-sectional area | 85.0288 mm² · 167,806 circular mils |
| Resistance (copper, 20°C) | 0.2028 Ω/km · 0.0618 Ω/1000ft |
| Resistance (aluminum, 20°C) | 0.3117 Ω/km · 0.095 Ω/1000ft |
| Ampacity — copper 60°C | 165 A |
| Ampacity — copper 75°C | 165 A |
| Ampacity — copper 90°C | 225 A |
| Ampacity — aluminum 75°C | 130 A |
| Weight (copper) | 761.858 kg/km · 511.944 lbs/1000ft |
| Weight (aluminum) | 229.578 kg/km · 154.269 lbs/1000ft |
| Closest metric size | 85.0 mm² |
| Skin depth at 60 Hz | 8.531 mm |
| Type | Temperature | Description |
|---|---|---|
| THHN/THWN-2 | 90°C dry / 75°C wet | Most common for building wire |
| XHHW-2 | 90°C dry and wet | Cross-linked polyethylene, moisture resistant |
| USE-2 | 90°C | Underground service entrance |
| NM-B (Romex) | 90°C | Non-metallic sheathed cable for residential |
| UF-B | 60°C | Underground feeder, direct burial |