550 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 550 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 12.74V (1.85%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 21.02V (3.05%)
Voltage at Load677.3 VLine Loss: 12137.8 W
Max Power & Breaker657.31 kW600A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A 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 | 3397.71 V (492.42%) | 0.0 V | 5604.63 V (812.26%) | 3236750.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2038.62 V (295.45%) | 0.0 V | 3362.78 V (487.36%) | 1942050.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1274.14 V (184.66%) | 0.0 V | 2101.74 V (304.6%) | 1213781.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 849.43 V (123.11%) | 0.0 V | 1401.16 V (203.07%) | 809187.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 509.66 V (73.86%) | 180.3 V | 840.69 V (121.84%) | 485512.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 318.53 V (46.16%) | 371.5 V | 525.43 V (76.15%) | 303445.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 203.86 V (29.55%) | 486.1 V | 336.28 V (48.74%) | 194205.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 145.62 V (21.1%) | 544.4 V | 240.2 V (34.81%) | 138717.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 101.93 V (14.77%) | 588.1 V | 168.14 V (24.37%) | 97102.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 72.81 V (10.55%) | 617.2 V | 120.1 V (17.41%) | 69358.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 53.65 V (7.78%) | 636.4 V | 88.49 V (12.83%) | 51106.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 42.47 V (6.16%) | 647.5 V | 70.06 V (10.15%) | 40459.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 33.98 V (4.92%) | 656.0 V | 56.05 V (8.12%) | 32367.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 27.55 V (3.99%) | 662.5 V | 45.44 V (6.59%) | 26243.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 21.24 V (3.08%) | 668.8 V | 35.03 V (5.08%) | 20229.7 W | Drop High |
| 300 mm² | 477 A | 372 A | 16.99 V (2.46%) | 673.0 V | 28.02 V (4.06%) | 16183.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 12.74 V (1.85%) | 677.3 V | 21.02 V (3.05%) | 12137.8 W | ✓ OK (≤3%) |
FAQ — 550 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 550A at 250 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 550A over 250m at 690V (voltage drop: 12.74V or 1.85%).
What is the power capacity of 550A at 690V?
At unity power factor, 550A at 690V supports 657.31 kW with a standard 600A circuit breaker.
Related Lengths & Currents (690V)
550A · 5m (690V)550A · 10m (690V)550A · 15m (690V)550A · 20m (690V)550A · 25m (690V)550A · 30m (690V)550A · 35m (690V)550A · 40m (690V)550A · 45m (690V)550A · 50m (690V)550A · 60m (690V)550A · 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)