1 mm² metric wire specifications (IEC 60228): 1.128 mm diameter, 10A ampacity (copper, flexible cord, BS 7671 Table 4F3A), closest AWG equivalent is 17. Resistance, weight, and common uses.
| Cross-sectional area | 1 mm² |
| Diameter (solid equivalent) | 1.128 mm |
| Closest AWG equivalent | 17 AWG |
| Ampacity (copper, flexible cord, BS 7671 Table 4F3A) | 10 A |
| Ampacity (aluminum) | — A |
| Max resistance (copper, 20°C, IEC 60228 class 2) | 18.1 Ω/km |
| Max resistance (aluminium, 20°C, IEC 60228) | — (IEC 60228 aluminium starts at 10 mm²) |
| Weight (copper) | 8.96 kg/km |
| Weight (aluminum) | 2.7 kg/km |
The IEC 60228 metric system specifies wire by cross-sectional area in mm², while AWG uses a gauge number system. The closest AWG equivalent to 1 mm² is 17 AWG, but they are not exactly the same size.
Metric sizes are standard in Europe, Asia, Australia, and most countries outside North America. When replacing or matching wire between systems, always verify the actual cross-sectional area rather than relying on approximate equivalents.
1 mm² metric wire (IEC 60228) is rated 10A (copper, flexible cord, BS 7671 Table 4F3A) and is commonly used for lighting circuits, interior lamp wiring, control panel wiring. Its diameter is 1.128 mm. The closest AWG equivalent is 17-18 AWG.
1 mm² wire is approximately equivalent to 17-18 AWG in the American Wire Gauge system. Note that IEC and AWG sizes do not align exactly — when substituting, choose the AWG size with equal or greater cross-sectional area to ensure adequate ampacity.