475 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 475 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 14.67V (2.13%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 18.15V (2.63%)
Voltage at Load675.3 VLine Loss: 12070.9 W
Max Power & Breaker567.68 kW500A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 475A at 250m
| Cross-Section (mm²) | Cu Ampacity | Al Ampacity | Cu Voltage Drop | Load Voltage | Al Voltage Drop | Power Loss | Status |
|---|---|---|---|---|---|---|---|
| 1.5 mm² | 16 A | 12 A | 2934.38 V (425.27%) | 0.0 V | 4840.36 V (701.5%) | 2414187.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1760.63 V (255.16%) | 0.0 V | 2904.22 V (420.9%) | 1448512.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 1100.39 V (159.48%) | 0.0 V | 1815.14 V (263.06%) | 905320.3 W | Drop High |
| 6 mm² | 41 A | 32 A | 733.6 V (106.32%) | 0.0 V | 1210.09 V (175.38%) | 603546.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 440.16 V (63.79%) | 249.8 V | 726.05 V (105.23%) | 362128.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 275.1 V (39.87%) | 414.9 V | 453.78 V (65.77%) | 226330.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 176.06 V (25.52%) | 513.9 V | 290.42 V (42.09%) | 144851.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 125.76 V (18.23%) | 564.2 V | 207.44 V (30.06%) | 103465.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 88.03 V (12.76%) | 602.0 V | 145.21 V (21.05%) | 72425.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 62.88 V (9.11%) | 627.1 V | 103.72 V (15.03%) | 51732.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 46.33 V (6.71%) | 643.7 V | 76.43 V (11.08%) | 38118.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 36.68 V (5.32%) | 653.3 V | 60.5 V (8.77%) | 30177.3 W | Drop High |
| 150 mm² | 309 A | 241 A | 29.34 V (4.25%) | 660.7 V | 48.4 V (7.02%) | 24141.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 23.79 V (3.45%) | 666.2 V | 39.25 V (5.69%) | 19574.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 18.34 V (2.66%) | 671.7 V | 30.25 V (4.38%) | 15088.7 W | Drop High |
| 300 mm² | 477 A | 372 A | 14.67 V (2.13%) | 675.3 V | 24.2 V (3.51%) | 12070.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 11.0 V (1.59%) | 679.0 V | 18.15 V (2.63%) | 9053.2 W | ✓ OK (≤3%) |
FAQ — 475 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 475A at 250 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 475A over 250m at 690V (voltage drop: 14.67V or 2.13%).
What is the power capacity of 475A at 690V?
At unity power factor, 475A at 690V supports 567.68 kW with a standard 500A circuit breaker.
Related Lengths & Currents (690V)
475A · 5m (690V)475A · 10m (690V)475A · 15m (690V)475A · 20m (690V)475A · 25m (690V)475A · 30m (690V)475A · 35m (690V)475A · 40m (690V)475A · 45m (690V)475A · 50m (690V)475A · 60m (690V)475A · 70m (690V)10A · 250m (690V)16A · 250m (690V)20A · 250m (690V)25A · 250m (690V)32A · 250m (690V)40A · 250m (690V)50A · 250m (690V)63A · 250m (690V)80A · 250m (690V)100A · 250m (690V)125A · 250m (690V)160A · 250m (690V)200A · 250m (690V)