550 Amp Cable Size at 20 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 20 m (65.6 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 1.02V (0.25%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.68V (0.41%)
Voltage at Load414.0 VLine Loss: 971.0 W
Max Power & Breaker395.34 kW600A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A at 20m
| 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 | 271.82 V (65.5%) | 143.2 V | 448.37 V (108.04%) | 258940.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 163.09 V (39.3%) | 251.9 V | 269.02 V (64.82%) | 155364.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 101.93 V (24.56%) | 313.1 V | 168.14 V (40.52%) | 97102.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 67.95 V (16.37%) | 347.0 V | 112.09 V (27.01%) | 64735.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 40.77 V (9.82%) | 374.2 V | 67.26 V (16.21%) | 38841.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 25.48 V (6.14%) | 389.5 V | 42.03 V (10.13%) | 24275.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 16.31 V (3.93%) | 398.7 V | 26.9 V (6.48%) | 15536.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 11.65 V (2.81%) | 403.4 V | 19.22 V (4.63%) | 11097.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 8.15 V (1.96%) | 406.8 V | 13.45 V (3.24%) | 7768.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 5.82 V (1.4%) | 409.2 V | 9.61 V (2.32%) | 5548.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.29 V (1.03%) | 410.7 V | 7.08 V (1.71%) | 4088.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.4 V (0.82%) | 411.6 V | 5.6 V (1.35%) | 3236.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.72 V (0.65%) | 412.3 V | 4.48 V (1.08%) | 2589.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.2 V (0.53%) | 412.8 V | 3.64 V (0.88%) | 2099.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.7 V (0.41%) | 413.3 V | 2.8 V (0.68%) | 1618.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.36 V (0.33%) | 413.6 V | 2.24 V (0.54%) | 1294.7 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.02 V (0.25%) | 414.0 V | 1.68 V (0.41%) | 971.0 W | ✓ OK (≤3%) |
FAQ — 550 Amp Cable Size at 20 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 550A at 20 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 20m at 415V (voltage drop: 1.02V or 0.25%).
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 · 25m (415V)550A · 30m (415V)550A · 35m (415V)550A · 40m (415V)550A · 45m (415V)550A · 50m (415V)550A · 60m (415V)550A · 70m (415V)10A · 20m (415V)16A · 20m (415V)20A · 20m (415V)25A · 20m (415V)32A · 20m (415V)40A · 20m (415V)50A · 20m (415V)63A · 20m (415V)80A · 20m (415V)100A · 20m (415V)125A · 20m (415V)160A · 20m (415V)200A · 20m (415V)