475 Amp Cable Size at 40 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 40 m (131.2 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 2.35V (0.34%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.9V (0.42%)
Voltage at Load687.7 VLine Loss: 1931.3 W
Max Power & Breaker567.68 kW500A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 475A at 40m
| 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 | 469.5 V (68.04%) | 220.5 V | 774.46 V (112.24%) | 386270.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 281.7 V (40.83%) | 408.3 V | 464.67 V (67.34%) | 231762.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 176.06 V (25.52%) | 513.9 V | 290.42 V (42.09%) | 144851.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 117.38 V (17.01%) | 572.6 V | 193.61 V (28.06%) | 96567.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 70.43 V (10.21%) | 619.6 V | 116.17 V (16.84%) | 57940.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 44.02 V (6.38%) | 646.0 V | 72.61 V (10.52%) | 36212.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 28.17 V (4.08%) | 661.8 V | 46.47 V (6.73%) | 23176.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 20.12 V (2.92%) | 669.9 V | 33.19 V (4.81%) | 16554.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 14.09 V (2.04%) | 675.9 V | 23.23 V (3.37%) | 11588.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 10.06 V (1.46%) | 679.9 V | 16.6 V (2.41%) | 8277.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.41 V (1.07%) | 682.6 V | 12.23 V (1.77%) | 6099.0 W | Drop High |
| 120 mm² | 269 A | 210 A | 5.87 V (0.85%) | 684.1 V | 9.68 V (1.4%) | 4828.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.7 V (0.68%) | 685.3 V | 7.74 V (1.12%) | 3862.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.81 V (0.55%) | 686.2 V | 6.28 V (0.91%) | 3131.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.93 V (0.43%) | 687.1 V | 4.84 V (0.7%) | 2414.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.35 V (0.34%) | 687.7 V | 3.87 V (0.56%) | 1931.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.76 V (0.26%) | 688.2 V | 2.9 V (0.42%) | 1448.5 W | ✓ OK (≤3%) |
FAQ — 475 Amp Cable Size at 40 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 475A at 40 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 40m at 690V (voltage drop: 2.35V or 0.34%).
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 · 45m (690V)475A · 50m (690V)475A · 60m (690V)475A · 70m (690V)10A · 40m (690V)16A · 40m (690V)20A · 40m (690V)25A · 40m (690V)32A · 40m (690V)40A · 40m (690V)50A · 40m (690V)63A · 40m (690V)80A · 40m (690V)100A · 40m (690V)125A · 40m (690V)160A · 40m (690V)200A · 40m (690V)