475 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 475 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 1.17V (0.28%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.45V (0.35%)
Voltage at Load413.8 VLine Loss: 965.7 W
Max Power & Breaker341.43 kW500A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 475A 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 | 234.75 V (56.57%) | 180.2 V | 387.23 V (93.31%) | 193135.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 140.85 V (33.94%) | 274.1 V | 232.34 V (55.98%) | 115881.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 88.03 V (21.21%) | 327.0 V | 145.21 V (34.99%) | 72425.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 58.69 V (14.14%) | 356.3 V | 96.81 V (23.33%) | 48283.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 35.21 V (8.48%) | 379.8 V | 58.08 V (14.0%) | 28970.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 22.01 V (5.3%) | 393.0 V | 36.3 V (8.75%) | 18106.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 14.09 V (3.39%) | 400.9 V | 23.23 V (5.6%) | 11588.1 W | Drop High |
| 35 mm² | 125 A | 97 A | 10.06 V (2.42%) | 404.9 V | 16.6 V (4.0%) | 8277.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 7.04 V (1.7%) | 408.0 V | 11.62 V (2.8%) | 5794.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 5.03 V (1.21%) | 410.0 V | 8.3 V (2.0%) | 4138.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 3.71 V (0.89%) | 411.3 V | 6.11 V (1.47%) | 3049.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.93 V (0.71%) | 412.1 V | 4.84 V (1.17%) | 2414.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.35 V (0.57%) | 412.7 V | 3.87 V (0.93%) | 1931.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.9 V (0.46%) | 413.1 V | 3.14 V (0.76%) | 1566.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.47 V (0.35%) | 413.5 V | 2.42 V (0.58%) | 1207.1 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.17 V (0.28%) | 413.8 V | 1.94 V (0.47%) | 965.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.88 V (0.21%) | 414.1 V | 1.45 V (0.35%) | 724.3 W | ✓ OK (≤3%) |
FAQ — 475 Amp Cable Size at 20 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 475A at 20 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 475A over 20m at 415V (voltage drop: 1.17V or 0.28%).
What is the power capacity of 475A at 415V?
At unity power factor, 475A at 415V supports 341.43 kW with a standard 500A circuit breaker.
Related Lengths & Currents (415V)
475A · 5m (415V)475A · 10m (415V)475A · 15m (415V)475A · 25m (415V)475A · 30m (415V)475A · 35m (415V)475A · 40m (415V)475A · 45m (415V)475A · 50m (415V)475A · 60m (415V)475A · 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)