250 Amp Cable Size at 10 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 250 A over 10 m (32.8 ft).
Copper Cable (≤3% Drop)120 mm²Drop: 0.77V (0.11%)
Aluminum Cable (≤3% Drop)185 mm²Drop: 0.83V (0.12%)
Voltage at Load689.2 VLine Loss: 334.4 W
Max Power & Breaker298.78 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A at 10m
| 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 | 61.78 V (8.95%) | 628.2 V | 101.9 V (14.77%) | 26750.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 37.07 V (5.37%) | 652.9 V | 61.14 V (8.86%) | 16050.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 23.17 V (3.36%) | 666.8 V | 38.21 V (5.54%) | 10031.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 15.44 V (2.24%) | 674.6 V | 25.48 V (3.69%) | 6687.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 9.27 V (1.34%) | 680.7 V | 15.29 V (2.22%) | 4012.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 5.79 V (0.84%) | 684.2 V | 9.55 V (1.38%) | 2507.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 3.71 V (0.54%) | 686.3 V | 6.11 V (0.89%) | 1605.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 2.65 V (0.38%) | 687.4 V | 4.37 V (0.63%) | 1146.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.85 V (0.27%) | 688.1 V | 3.06 V (0.44%) | 802.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 1.32 V (0.19%) | 688.7 V | 2.18 V (0.32%) | 573.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 0.98 V (0.14%) | 689.0 V | 1.61 V (0.23%) | 422.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 0.77 V (0.11%) | 689.2 V | 1.27 V (0.18%) | 334.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.62 V (0.09%) | 689.4 V | 1.02 V (0.15%) | 267.5 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.5 V (0.07%) | 689.5 V | 0.83 V (0.12%) | 216.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.39 V (0.06%) | 689.6 V | 0.64 V (0.09%) | 167.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.31 V (0.04%) | 689.7 V | 0.51 V (0.07%) | 133.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.23 V (0.03%) | 689.8 V | 0.38 V (0.06%) | 100.3 W | ✓ OK (≤3%) |
FAQ — 250 Amp Cable Size at 10 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 250A at 10 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 120 mm² copper cable for 250A over 10m at 690V (voltage drop: 0.77V or 0.11%).
What is the power capacity of 250A at 690V?
At unity power factor, 250A at 690V supports 298.78 kW with a standard 250A circuit breaker.
Related Lengths & Currents (690V)
250A · 5m (690V)250A · 15m (690V)250A · 20m (690V)250A · 25m (690V)250A · 30m (690V)250A · 35m (690V)250A · 40m (690V)250A · 45m (690V)250A · 50m (690V)250A · 60m (690V)250A · 70m (690V)10A · 10m (690V)16A · 10m (690V)20A · 10m (690V)25A · 10m (690V)32A · 10m (690V)40A · 10m (690V)50A · 10m (690V)63A · 10m (690V)80A · 10m (690V)100A · 10m (690V)125A · 10m (690V)160A · 10m (690V)200A · 10m (690V)