550 Amp Cable Size at 25 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 25 m (82.0 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 1.27V (0.31%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.1V (0.51%)
Voltage at Load413.7 VLine Loss: 1213.8 W
Max Power & Breaker395.34 kW600A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A at 25m
| 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 | 339.77 V (81.87%) | 75.2 V | 560.46 V (135.05%) | 323675.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 203.86 V (49.12%) | 211.1 V | 336.28 V (81.03%) | 194205.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 127.41 V (30.7%) | 287.6 V | 210.17 V (50.64%) | 121378.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 84.94 V (20.47%) | 330.1 V | 140.12 V (33.76%) | 80918.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 50.97 V (12.28%) | 364.0 V | 84.07 V (20.26%) | 48551.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 31.85 V (7.68%) | 383.1 V | 52.54 V (12.66%) | 30344.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 20.39 V (4.91%) | 394.6 V | 33.63 V (8.1%) | 19420.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 14.56 V (3.51%) | 400.4 V | 24.02 V (5.79%) | 13871.8 W | Drop High |
| 50 mm² | 151 A | 118 A | 10.19 V (2.46%) | 404.8 V | 16.81 V (4.05%) | 9710.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 7.28 V (1.75%) | 407.7 V | 12.01 V (2.89%) | 6935.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 5.36 V (1.29%) | 409.6 V | 8.85 V (2.13%) | 5110.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 4.25 V (1.02%) | 410.8 V | 7.01 V (1.69%) | 4045.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.4 V (0.82%) | 411.6 V | 5.6 V (1.35%) | 3236.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.75 V (0.66%) | 412.2 V | 4.54 V (1.1%) | 2624.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.12 V (0.51%) | 412.9 V | 3.5 V (0.84%) | 2023.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.7 V (0.41%) | 413.3 V | 2.8 V (0.68%) | 1618.4 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.27 V (0.31%) | 413.7 V | 2.1 V (0.51%) | 1213.8 W | ✓ OK (≤3%) |
FAQ — 550 Amp Cable Size at 25 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 550A at 25 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 25m at 415V (voltage drop: 1.27V or 0.31%).
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 · 30m (415V)550A · 35m (415V)550A · 40m (415V)550A · 45m (415V)550A · 50m (415V)550A · 60m (415V)550A · 70m (415V)10A · 25m (415V)16A · 25m (415V)20A · 25m (415V)25A · 25m (415V)32A · 25m (415V)40A · 25m (415V)50A · 25m (415V)63A · 25m (415V)80A · 25m (415V)100A · 25m (415V)125A · 25m (415V)160A · 25m (415V)200A · 25m (415V)