Installation method F according table B.52.1.
Single-core cables, touching in free air
Clearance to wall not less than one cable diameter
Maximum allowed current in function of the ambient temperature for installation method F
conductor temperature 70°C
Ambient temperature
Cable section 30 °C 40 °C 45 °C 50 °C 55 °C
25 mm² < 110 A < 96 A < 87 A < 78 A < 67 A
35 mm² < 137 A < 119 A < 108 A < 97 A < 84 A
50 mm² < 167 A < 145 A < 132 A < 119 A < 102 A
70 mm² < 216 A < 188 A < 171 A < 153 A < 132 A
95 mm² < 264 A < 230 A < 209 A < 187 A < 161 A
120 mm² < 308 A < 268 A < 243 A < 219 A < 188 A
150 mm² < 356 A < 310 A < 281 A < 253 A < 217 A
185 mm² < 409 A < 356 A < 323 A < 290 A < 249 A
240 mm² < 485 A < 422 A < 383 A < 344 A < 296 A
300 mm² < 561 A < 488 A < 443 A < 398 A < 342 A
400 mm² < 659 A < 573 A < 518 A < 467 A < 402 A
Maximum allowed current in function of the ambient temperature for installation method
F,conductor temperature 90°C
Ambient temperature
Cable section 30 °C 40 °C 45 °C 50 °C 55 °C
25 mm² < 135 A < 123 A < 117 A < 110 A < 103 A
35 mm² < 169 A < 154 A < 147 A < 139 A < 128 A
50 mm² < 207 A < 188 A < 180 A < 170 A < 157 A
70 mm² < 268 A < 244 A < 233 A < 220 A < 204 A
95 mm² < 328 A < 298 A < 285 A < 269 A < 249 A
120 mm² < 383 A < 349 A < 333 A < 314 A < 291 A
150 mm² < 444 A < 404 A < 386 A < 364 A < 337 A
185 mm² < 510 A < 464 A < 443 A < 418 A < 388 A
240 mm² < 607 A < 552 A < 528 A < 498 A < 461 A
300 mm² < 703 A < 639 A < 611 A < 576 A < 534 A
400 mm² < 823 A < 749 A < 716 A < 674 A < 625 A
Calculation method for IEC:
• Single supply cables (3 phases + PE - configuration (1)):
• Add 10 % to the total compressor current (I
tot
Pack or I
tot
FF from the tables)
• Install the prescribed fuse on each cable
• Parallel supply cable (2 x 3 phases + PE - configuration (2)):
Instruction book
164 2920 7109 51
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