475 Amp Cable Size at 70 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 70 m (229.7 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 4.11V (0.6%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.08V (0.74%)
Voltage at Load685.9 VLine Loss: 3379.9 W
Max Power & Breaker567.68 kW500A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 475A at 70m
| 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 | 821.63 V (119.08%) | 0.0 V | 1355.3 V (196.42%) | 675972.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 492.98 V (71.45%) | 197.0 V | 813.18 V (117.85%) | 405583.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 308.11 V (44.65%) | 381.9 V | 508.24 V (73.66%) | 253489.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 205.41 V (29.77%) | 484.6 V | 338.83 V (49.11%) | 168993.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 123.24 V (17.86%) | 566.8 V | 203.3 V (29.46%) | 101395.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 77.03 V (11.16%) | 613.0 V | 127.06 V (18.41%) | 63372.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 49.3 V (7.14%) | 640.7 V | 81.32 V (11.79%) | 40558.3 W | Drop High |
| 35 mm² | 125 A | 97 A | 35.21 V (5.1%) | 654.8 V | 58.08 V (8.42%) | 28970.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 24.65 V (3.57%) | 665.4 V | 40.66 V (5.89%) | 20279.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 17.61 V (2.55%) | 672.4 V | 29.04 V (4.21%) | 14485.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 10673.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 10.27 V (1.49%) | 679.7 V | 16.94 V (2.46%) | 8449.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 8.22 V (1.19%) | 681.8 V | 13.55 V (1.96%) | 6759.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 6.66 V (0.97%) | 683.3 V | 10.99 V (1.59%) | 5480.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.14 V (0.74%) | 684.9 V | 8.47 V (1.23%) | 4224.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.11 V (0.6%) | 685.9 V | 6.78 V (0.98%) | 3379.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.08 V (0.45%) | 686.9 V | 5.08 V (0.74%) | 2534.9 W | ✓ OK (≤3%) |
FAQ — 475 Amp Cable Size at 70 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 475A at 70 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 70m at 690V (voltage drop: 4.11V or 0.6%).
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)10A · 70m (690V)16A · 70m (690V)20A · 70m (690V)25A · 70m (690V)32A · 70m (690V)40A · 70m (690V)50A · 70m (690V)63A · 70m (690V)80A · 70m (690V)100A · 70m (690V)125A · 70m (690V)160A · 70m (690V)200A · 70m (690V)