AWG 3/0 Wire
Diameter 0.4096″
Millimeters 10.404 mm
Cross-section 167.8 kcmil
mm² 85.01
Nominal bare-conductor dimensions per ASTM B258. AWG is geometric: d = 0.005 × 92(36−n)/39 in with n = -2; area is derived from the diameter. Ampacity depends on insulation, bundling, and the electrical code in force — it is a property of the installation, not the gauge.
Neighboring gauges
| AWG | Diameter | mm | vs AWG 3/0 |
|---|---|---|---|
| 4/0 | 0.4600″ | 11.684 | +0.0504″ |
| 3/0 | 0.4096″ | 10.404 | — |
| 2/0 | 0.3648″ | 9.266 | −0.0448″ |
| 1/0 | 0.3249″ | 8.252 | −0.0847″ |