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Ampacity of XLPE power direct buried cable laying

Information Source:Henan Huadong Cable Co., Ltd Release date:2014-03-19

XLPE insulated power cable laying installation should note four points:
1, cable laying should use special tools, such as wire frame, guide roller, to prevent mechanical damage laying process, away from the heat source.
2, Pipe laying, cable through 1.5 times the pipe diameter is not less than the diameter of the cable, no cable twisted cable tube extruding a plurality, enough capacity of pipeline, the total area of the requirements of cable does not exceed the total area in a tube 40%
3, the cable laying the minimum temperature is not lower than 0 ℃, the bending radius of not less than 20 times.
4, when the traction laying conductor clamp mode, allowing for maximum traction force is P=OA (N), A conductor section. O 50N/mm (copper) and 30N/mm2 (aluminum).

The current carrying capacity of Huadong XLPE power cable laying, cable conductor material,cores,voltage values are related, the table below is the Huadong special statistics from the load flow details:

Section 
(mm2)
      0.6/1KV(A) 
θn=90℃
  6/6KV~8.7/10KV(A) θn=90℃ 26/35KV(A)
θn=80℃
4
core
single core
θn=30℃
3
core
single core
θn=30℃
3
cores
single core
 θn=30℃
20℃ 25℃ 30℃       20℃ 25℃ 30℃       25℃    
Aluminum
core
4 42 40 38                        
6 47 45 43                        
10 62 60 58                        
16 83 80 77                        
25 104 100 96       109 105 101            
35 125 120 115       130 125 120            
50 146 140 134       151 145 139     137      
70 182 175 168       187 180 173 215 205 172      
95 218 210 202       224 215 206 255 235 206      
120 244 235 226       255 245 235 280 265 224      
150 276 265 254       286 275 264 320 305 243      
185 317 305 293       322 310 298 350 335        
240 369 355 341       374 360 346 400 390        
300             416 400 384 440 430        
400                   505 515        
500                   555 575        
630                   610 640        
copper
core
4 52 50 48                        
6 62 60 58                        
10 83 80 77                        
16 104 100 96                        
25 135 130 125       140 135 130            
35 161 155 149       166 160 154            
50 192 185 178       198 190 182            
70 234 225 216       239 230 221 270 260 177      
95 281 270 259       286 275 264 320 300 221      
120 317 305 293       322 310 298 355 340 267      
150 359 345 331       364 350 336 390 385 288      
185 406 390 374       411 395 379 430 430 313      
240 473 455 437       473 455 437 490 490        
300             536 , 515 494 535 550        
400                   595 570        
500                   655 630        
630                   710 765        
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