250 Amp Cable Size at 90 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 250 A over 90 m (295.3 ft).
Copper Cable (≤3% Drop)120 mm²Drop: 6.95V (1.74%)
Aluminum Cable (≤3% Drop)185 mm²Drop: 7.44V (1.86%)
Voltage at Load393.1 VLine Loss: 3009.4 W
Max Power & Breaker173.21 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A at 90m
| 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 | 555.99 V (139.0%) | 0.0 V | 917.12 V (229.28%) | 240750.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 333.59 V (83.4%) | 66.4 V | 550.27 V (137.57%) | 144450.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 208.5 V (52.12%) | 191.5 V | 343.92 V (85.98%) | 90281.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 139.0 V (34.75%) | 261.0 V | 229.28 V (57.32%) | 60187.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 83.4 V (20.85%) | 316.6 V | 137.57 V (34.39%) | 36112.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 52.12 V (13.03%) | 347.9 V | 85.98 V (21.5%) | 22570.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 33.36 V (8.34%) | 366.6 V | 55.03 V (13.76%) | 14445.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 23.83 V (5.96%) | 376.2 V | 39.31 V (9.83%) | 10317.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 16.68 V (4.17%) | 383.3 V | 27.51 V (6.88%) | 7222.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 11.91 V (2.98%) | 388.1 V | 19.65 V (4.91%) | 5158.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 8.78 V (2.19%) | 391.2 V | 14.48 V (3.62%) | 3801.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.95 V (1.74%) | 393.1 V | 11.46 V (2.87%) | 3009.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 5.56 V (1.39%) | 394.4 V | 9.17 V (2.29%) | 2407.5 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 4.51 V (1.13%) | 395.5 V | 7.44 V (1.86%) | 1952.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.47 V (0.87%) | 396.5 V | 5.73 V (1.43%) | 1504.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.78 V (0.69%) | 397.2 V | 4.59 V (1.15%) | 1203.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.08 V (0.52%) | 397.9 V | 3.44 V (0.86%) | 902.8 W | ✓ OK (≤3%) |
FAQ — 250 Amp Cable Size at 90 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 250A at 90 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 120 mm² copper cable for 250A over 90m at 400V (voltage drop: 6.95V or 1.74%).
What is the power capacity of 250A at 400V?
At unity power factor, 250A at 400V supports 173.21 kW with a standard 250A circuit breaker.
Related Lengths & Currents (400V)
250A · 5m (400V)250A · 10m (400V)250A · 15m (400V)250A · 20m (400V)250A · 25m (400V)250A · 30m (400V)250A · 35m (400V)250A · 40m (400V)250A · 45m (400V)250A · 50m (400V)250A · 60m (400V)250A · 70m (400V)10A · 90m (400V)16A · 90m (400V)20A · 90m (400V)25A · 90m (400V)32A · 90m (400V)40A · 90m (400V)50A · 90m (400V)63A · 90m (400V)80A · 90m (400V)100A · 90m (400V)125A · 90m (400V)160A · 90m (400V)200A · 90m (400V)