圆铜导体的大直径 mm
| 标称截面 mm2 | 固定敷设电缆用导体 | 软导体 （第5和6种） | |
| 实心（第1种） | 绞合（第2种） | ||
| 0.5 | 0.9 | 1.1 | 1.1 |
| 0.75 | 1.0 | 1.2 | 1.3 |
| 1 | 1.2 | 1.4 | 1.5 |
| 1.5 | 1.5 | 1.7 | 1.8 |
| 2.5 | 1.9 | 2.2 | 2.6 |
| 4 | 2.4 | 2.7 | 3.2 |
| 6 | 2.9 | 3.3 | 3.9 |
| 10 | 3.7 | 4.2 | 5.1 |
| 16 | 4.6 | 5.3 | 6.3 |
| 25 | 5.7 | 6.6 | 7.8 |
| 35 | 6.7 | 7.9 | 9.2 |
| 50 | 7.8 | 9.1 | 11.0 |
| 70 | 9.4 | 11.0 | 13.1 |
| 95 | 11.0 | 12.9 | 15.1 |
| 120 | 12.4 | 14.5 | 17.0 |
| 150 | 13.8 | 16.2 | 19.0 |
| 185 | - | 18.0 | 21.0 |
| 240 | - | 20.9 | 24.0 |
| 300 | - | 23.1 | 27.0 |
| 400 | - | 26.1 | 31.0 |
| 500 | - | 29.2 | 35.0 |
| 630 | - | 33.2 | |
| 800 | - | 37.6 | - |
| 1000 | - | 42.2 | - |
