AWG 31 Wire
Diameter 0.0089″
Millimeters 0.226 mm
Cross-section 79 cmil
mm² 0.0401
Nominal bare-conductor dimensions per ASTM B258. AWG is geometric: d = 0.005 × 92(36−n)/39 in with n = 31; 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 31 |
|---|---|---|---|
| 29 | 0.0113″ | 0.287 | +0.0024″ |
| 30 | 0.0100″ | 0.254 | +0.0011″ |
| 31 | 0.0089″ | 0.226 | — |
| 32 | 0.0080″ | 0.203 | −0.0009″ |
| 33 | 0.0071″ | 0.180 | −0.0018″ |