750 Amp Cable Size at 400 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 750 A over 400 m (1312.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 13.9V (2.02%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 45.86V (6.65%)
Voltage at Load676.1 VLine Loss: 18056.2 W
Max Power & Breaker896.34 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A at 400m
| 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 | 7413.18 V (1074.37%) | 0.0 V | 12228.28 V (1772.21%) | 9630000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 4447.91 V (644.62%) | 0.0 V | 7336.97 V (1063.33%) | 5778000.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 2779.94 V (402.89%) | 0.0 V | 4585.6 V (664.58%) | 3611250.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1853.29 V (268.59%) | 0.0 V | 3057.07 V (443.05%) | 2407500.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 1111.98 V (161.16%) | 0.0 V | 1834.24 V (265.83%) | 1444500.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 694.99 V (100.72%) | 0.0 V | 1146.4 V (166.15%) | 902812.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 444.79 V (64.46%) | 245.2 V | 733.7 V (106.33%) | 577800.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 317.71 V (46.04%) | 372.3 V | 524.07 V (75.95%) | 412714.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 222.4 V (32.23%) | 467.6 V | 366.85 V (53.17%) | 288900.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 158.85 V (23.02%) | 531.1 V | 262.03 V (37.98%) | 206357.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 117.05 V (16.96%) | 572.9 V | 193.08 V (27.98%) | 152052.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 92.66 V (13.43%) | 597.3 V | 152.85 V (22.15%) | 120375.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 74.13 V (10.74%) | 615.9 V | 122.28 V (17.72%) | 96300.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 60.11 V (8.71%) | 629.9 V | 99.15 V (14.37%) | 78081.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 46.33 V (6.71%) | 643.7 V | 76.43 V (11.08%) | 60187.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 37.07 V (5.37%) | 652.9 V | 61.14 V (8.86%) | 48150.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 36112.5 W | Drop High |
FAQ — 750 Amp Cable Size at 400 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 750A at 400 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 750A over 400m at 690V (voltage drop: 13.9V or 2.02%).
What is the power capacity of 750A at 690V?
At unity power factor, 750A at 690V supports 896.34 kW with a standard 800A circuit breaker.
Related Lengths & Currents (690V)
750A · 5m (690V)750A · 10m (690V)750A · 15m (690V)750A · 20m (690V)750A · 25m (690V)750A · 30m (690V)750A · 35m (690V)750A · 40m (690V)750A · 45m (690V)750A · 50m (690V)750A · 60m (690V)750A · 70m (690V)10A · 400m (690V)16A · 400m (690V)20A · 400m (690V)25A · 400m (690V)32A · 400m (690V)40A · 400m (690V)50A · 400m (690V)63A · 400m (690V)80A · 400m (690V)100A · 400m (690V)125A · 400m (690V)160A · 400m (690V)200A · 400m (690V)