375 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 375 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 14.48V (2.1%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 14.33V (2.08%)
Voltage at Load675.5 VLine Loss: 9404.3 W
Max Power & Breaker448.17 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 375A 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 | 2316.62 V (335.74%) | 0.0 V | 3821.34 V (553.82%) | 1504687.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1389.97 V (201.45%) | 0.0 V | 2292.8 V (332.29%) | 902812.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 868.73 V (125.9%) | 0.0 V | 1433.0 V (207.68%) | 564257.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 579.15 V (83.94%) | 110.8 V | 955.33 V (138.45%) | 376171.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 347.49 V (50.36%) | 342.5 V | 573.2 V (83.07%) | 225703.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 217.18 V (31.48%) | 472.8 V | 358.25 V (51.92%) | 141064.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 139.0 V (20.14%) | 551.0 V | 229.28 V (33.23%) | 90281.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 99.28 V (14.39%) | 590.7 V | 163.77 V (23.74%) | 64486.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 69.5 V (10.07%) | 620.5 V | 114.64 V (16.61%) | 45140.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 49.64 V (7.19%) | 640.4 V | 81.89 V (11.87%) | 32243.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 36.58 V (5.3%) | 653.4 V | 60.34 V (8.74%) | 23758.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 28.96 V (4.2%) | 661.0 V | 47.77 V (6.92%) | 18808.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 23.17 V (3.36%) | 666.8 V | 38.21 V (5.54%) | 15046.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 18.78 V (2.72%) | 671.2 V | 30.98 V (4.49%) | 12200.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 14.48 V (2.1%) | 675.5 V | 23.88 V (3.46%) | 9404.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 11.58 V (1.68%) | 678.4 V | 19.11 V (2.77%) | 7523.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 8.69 V (1.26%) | 681.3 V | 14.33 V (2.08%) | 5642.6 W | ✓ OK (≤3%) |
FAQ — 375 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 375A at 250 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 375A over 250m at 690V (voltage drop: 14.48V or 2.1%).
What is the power capacity of 375A at 690V?
At unity power factor, 375A at 690V supports 448.17 kW with a standard 400A circuit breaker.
Related Lengths & Currents (690V)
375A · 5m (690V)375A · 10m (690V)375A · 15m (690V)375A · 20m (690V)375A · 25m (690V)375A · 30m (690V)375A · 35m (690V)375A · 40m (690V)375A · 45m (690V)375A · 50m (690V)375A · 60m (690V)375A · 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)