| No. of Cores and Nominal Cross Section | Max. Diameter of Copper Wires |
Min. Insulation Thickness |
Min. Sheath Thickness | Approx. Weight |
Max. D.C. Resistance of Conductor at 20℃ |
| No.× mm2 | mm | mm | mm | kg/km | Ω/km |
| 1×1.5 | 0.26 | 0.5 | 0.5 | 32 | 13.7 |
| 1×2.5 | 0.26 | 0.5 | 0.5 | 43 | 8.21 |
| 1×4 | 0.31 | 0.5 | 0.5 | 56 | 5.09 |
| 1×6 | 0.31 | 0.5 | 0.5 | 79 | 3.39 |
| 1×10 | 0.41 | 0.5 | 0.5 | 128 | 1.95 |
| 1×16 | 0.41 | 0.5 | 0.5 | 186 | 1.24 |
| 1×25 | 0.41 | 0.5 | 0.5 | 284 | 0.795 |
| 1×35 | 0.41 | 0.5 | 0.5 | 384 | 0.565 |
| Current rating conversion factors for different ambient temperatures | ||||||
| Ambient Temperature,℃ | Up to 60 | 70 | 80 | 90 | 100 | 110 |
| Conversion Factor | 1.00 | 0.91 | 0.82 | 0.71 | 0.58 | 0.41 |
| Nominal cross section | Current carrying capacity | ||
| Single cable, in air | Single cable on a surface |
Two loaded cables touching, on a surface | |
| mm2 | A | A | A |
| 1.5 | 30 | 29 | 24 |
| 2.5 | 41 | 39 | 33 |
| 4 | 55 | 52 | 44 |
| 6 | 70 | 67 | 57 |
| 10 | 98 | 93 | 79 |
| 16 | 132 | 125 | 107 |
| 25 | 176 | 167 | 142 |
| 35 | 218 | 207 | 176 |
| Ambient temperature: 60℃，Maximum conductor temperature: 120℃. | |||
