1/0 AWG wire specifications: 8.2515 mm diameter, 53.4751 mm² area, 125A ampacity (copper, 75°C). Resistance, weight, and common uses.
| Diameter | 8.2515 mm · 0.324861" · 324.86 mils |
| Cross-sectional area | 53.4751 mm² · 105,534 circular mils |
| Resistance (copper, 20°C) | 0.3224 Ω/km · 0.0983 Ω/1000ft |
| Resistance (aluminum, 20°C) | 0.4956 Ω/km · 0.151 Ω/1000ft |
| Ampacity — copper 60°C | 125 A |
| Ampacity — copper 75°C | 125 A |
| Ampacity — copper 90°C | 170 A |
| Ampacity — aluminum 75°C | 100 A |
| Weight (copper) | 479.137 kg/km · 321.965 lbs/1000ft |
| Weight (aluminum) | 144.383 kg/km · 97.021 lbs/1000ft |
| Closest metric size | 53.5 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 |