Laying in the air
- 1-core cable parallel laid distance:185mm² The following is 2times the cable diameter;240mm² and above 900 mm
- wire surrounding Ambient temperature:40℃
- Conductive core maximum allowable tempera- ture:70℃
- Different ambient temperature Ampacity correction factor
ambient temperature 20℃ 25℃ 35℃ 40℃ 48℃ correction factor 1.12 1.06 0.94 0.87 0.79
Direct burial installation
- Single-core cable is laid without contact , the center distance of 2 times the cable diameter
- wire surrounding Ambient temperature:25℃
- Conductive core maximum allowable tempera- ture:70℃
- Thermal resistivity of soil:1.0℃m/W
- Direct Buried Depth:0.7m
- -Different ambient temperature Ampacity correction factor
ambient temperature | 15℃ | 20℃ | 30℃ | 35℃ |
correction factor | 1.11 | 1.05 | 0.94 | 0.88 |
Specification
Nominal cross section mm2 | Ampacity | |||||||||||
Without armor | armoured | |||||||||||
Single core |
2-cores |
(3+1)
3+1cores |
5-cores |
Single core |
2-cores |
3cores |
5-cores |
|||||
|
3-Root |
4-cores |
(4+1)
4+1cores |
|
3-cores |
4-cores |
(4+1)
4+1cores |
|||||
2-Root
○○ |
2-cores
○○ |
|||||||||||
○○○ |
(3+1)
3+1cores |
(3+2)
3+2cores |
○○○ |
(3+1)
3+1cores |
(3+2)
3+2cores |
|||||||
1.5 | 28 | 23 | 23 | 20 | – | – | 28 | 23 | 26 | – | – | – |
2.5 | 36 | 30 | 33 | 26 | – | – | 36 | 30 | 33 | – | – | – |
4 | 47 | 39 | 44 | 37 | 30 | 31 | 46 | 39 | 44 | 38 | 31 | 32 |
6 | 60 | 49 | 56 | 44 | 37 | 38 | 60 | 49 | 56 | 45 | 38 | 39 |
10 | 83 | 68 | 77 | 61 | 53 | 54 | 83 | 68 | 77 | 62 | 54 | 55 |
16 | 109 | 89 | 101 | 82 | 69 | 70 | 109 | 89 | 101 | 84 | 70 | 71 |
25 | 138 | 113 | 128 | 104 | 89 | 91 | 138 | 113 | 128 | 106 | 91 | 91 |
35 | 173 | 142 | 161 | 127 | 109 | 111 | 173 | 142 | 161 | 130 | 111 | 112 |
50 | 207 | 170 | 193 | 155 | 132 | 135 | 207 | 170 | 193 | 158 | 135 | 137 |
70 | 264 | 216 | 246 | 190 | 167 | 170 | 264 | 216 | 246 | 194 | 170 | 173 |
95 | 322 | 264 | 299 | 242 | 213 | 217 | 322 | 264 | 299 | 247 | 217 | 221 |
120 | 374 | 307 | 348 | 282 | 242 | 247 | 374 | 307 | 348 | 288 | 246 | 350 |
150 | 431 | 353 | 401 | 322 | 282 | 288 | 431 | 353 | 401 | 328 | 287 | 290 |
185 | 495 | 406 | 460 | 368 | 322 | 328 | 495 | 406 | 460 | 375 | 327 | 330 |
240 | 587 | 481 | 546 | – | 385 | 393 | 587 | 481 | 546 | – | 393 | 398 |
300 | 673 | 552 | 626 | – | 431 | 440 | 673 | 552 | 626 | – | 439 | 445 |
400 | 794 | 652 | 738 | – | – | – | 794 | 652 | 738 | – | – | – |
500 | 920 | 754 | 856 | – | – | – | 920 | 754 | 856 | – | – | – |
630 | 1058 | 868 | 984 | – | – | – | 1058 | 868 | 984 | – | – | – |
800 | 1219 | 1001 | 1134 | – | – | – | 1219 | 1001 | 1134 | – | – | – |