550 Amp Cable Size at 70 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 70 m (229.7 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 3.57V (0.52%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.88V (0.85%)
Voltage at Load686.4 VLine Loss: 3398.6 W
Max Power & Breaker657.31 kW600A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A at 70m
| 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 | 951.36 V (137.88%) | 0.0 V | 1569.3 V (227.43%) | 906290.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 570.81 V (82.73%) | 119.2 V | 941.58 V (136.46%) | 543774.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 356.76 V (51.7%) | 333.2 V | 588.49 V (85.29%) | 339858.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 237.84 V (34.47%) | 452.2 V | 392.32 V (56.86%) | 226572.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 142.7 V (20.68%) | 547.3 V | 235.39 V (34.12%) | 135943.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 89.19 V (12.93%) | 600.8 V | 147.12 V (21.32%) | 84964.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 57.08 V (8.27%) | 632.9 V | 94.16 V (13.65%) | 54377.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 40.77 V (5.91%) | 649.2 V | 67.26 V (9.75%) | 38841.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 28.54 V (4.14%) | 661.5 V | 47.08 V (6.82%) | 27188.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 20.39 V (2.95%) | 669.6 V | 33.63 V (4.87%) | 19420.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 15.02 V (2.18%) | 675.0 V | 24.78 V (3.59%) | 14309.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 11.89 V (1.72%) | 678.1 V | 19.62 V (2.84%) | 11328.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.51 V (1.38%) | 680.5 V | 15.69 V (2.27%) | 9062.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.71 V (1.12%) | 682.3 V | 12.72 V (1.84%) | 7348.3 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.95 V (0.86%) | 684.1 V | 9.81 V (1.42%) | 5664.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.76 V (0.69%) | 685.2 V | 7.85 V (1.14%) | 4531.4 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.57 V (0.52%) | 686.4 V | 5.88 V (0.85%) | 3398.6 W | ✓ OK (≤3%) |
FAQ — 550 Amp Cable Size at 70 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 550A at 70 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 70m at 690V (voltage drop: 3.57V or 0.52%).
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)10A · 70m (690V)16A · 70m (690V)20A · 70m (690V)25A · 70m (690V)32A · 70m (690V)40A · 70m (690V)50A · 70m (690V)63A · 70m (690V)80A · 70m (690V)100A · 70m (690V)125A · 70m (690V)160A · 70m (690V)200A · 70m (690V)