550 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia 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 (0.86%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.88V (1.42%)
Voltage at Load411.4 VLine Loss: 3398.6 W
Max Power & Breaker395.34 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 (229.24%) | 0.0 V | 1569.3 V (378.14%) | 906290.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 570.81 V (137.55%) | 0.0 V | 941.58 V (226.89%) | 543774.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 356.76 V (85.97%) | 58.2 V | 588.49 V (141.8%) | 339858.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 237.84 V (57.31%) | 177.2 V | 392.32 V (94.54%) | 226572.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 142.7 V (34.39%) | 272.3 V | 235.39 V (56.72%) | 135943.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 89.19 V (21.49%) | 325.8 V | 147.12 V (35.45%) | 84964.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 57.08 V (13.75%) | 357.9 V | 94.16 V (22.69%) | 54377.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 40.77 V (9.82%) | 374.2 V | 67.26 V (16.21%) | 38841.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 28.54 V (6.88%) | 386.5 V | 47.08 V (11.34%) | 27188.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 20.39 V (4.91%) | 394.6 V | 33.63 V (8.1%) | 19420.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 15.02 V (3.62%) | 400.0 V | 24.78 V (5.97%) | 14309.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 11.89 V (2.87%) | 403.1 V | 19.62 V (4.73%) | 11328.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.51 V (2.29%) | 405.5 V | 15.69 V (3.78%) | 9062.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.71 V (1.86%) | 407.3 V | 12.72 V (3.07%) | 7348.3 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.95 V (1.43%) | 409.1 V | 9.81 V (2.36%) | 5664.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.76 V (1.15%) | 410.2 V | 7.85 V (1.89%) | 4531.4 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.57 V (0.86%) | 411.4 V | 5.88 V (1.42%) | 3398.6 W | ✓ OK (≤3%) |
FAQ — 550 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 550A at 70 meters (415V)?
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 415V (voltage drop: 3.57V or 0.86%).
What is the power capacity of 550A at 415V?
At unity power factor, 550A at 415V supports 395.34 kW with a standard 600A circuit breaker.
Related Lengths & Currents (415V)
550A · 5m (415V)550A · 10m (415V)550A · 15m (415V)550A · 20m (415V)550A · 25m (415V)550A · 30m (415V)550A · 35m (415V)550A · 40m (415V)550A · 45m (415V)550A · 50m (415V)550A · 60m (415V)10A · 70m (415V)16A · 70m (415V)20A · 70m (415V)25A · 70m (415V)32A · 70m (415V)40A · 70m (415V)50A · 70m (415V)63A · 70m (415V)80A · 70m (415V)100A · 70m (415V)125A · 70m (415V)160A · 70m (415V)200A · 70m (415V)