300 Amp Cable Size at 500 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 500 m (1640.4 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 6.95V (1.68%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 22.93V (5.52%)
Voltage at Load408.1 VLine Loss: 3611.2 W
Max Power & Breaker215.64 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 500m
| 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 | 3706.59 V (893.15%) | 0.0 V | 6114.14 V (1473.29%) | 1926000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2223.95 V (535.89%) | 0.0 V | 3668.48 V (883.97%) | 1155600.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1389.97 V (334.93%) | 0.0 V | 2292.8 V (552.48%) | 722250.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 926.65 V (223.29%) | 0.0 V | 1528.53 V (368.32%) | 481500.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 555.99 V (133.97%) | 0.0 V | 917.12 V (220.99%) | 288900.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 347.49 V (83.73%) | 67.5 V | 573.2 V (138.12%) | 180562.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 222.4 V (53.59%) | 192.6 V | 366.85 V (88.4%) | 115560.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 158.85 V (38.28%) | 256.1 V | 262.03 V (63.14%) | 82542.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 111.2 V (26.79%) | 303.8 V | 183.42 V (44.2%) | 57780.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 79.43 V (19.14%) | 335.6 V | 131.02 V (31.57%) | 41271.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 58.53 V (14.1%) | 356.5 V | 96.54 V (23.26%) | 30410.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 46.33 V (11.16%) | 368.7 V | 76.43 V (18.42%) | 24075.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 37.07 V (8.93%) | 377.9 V | 61.14 V (14.73%) | 19260.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 30.05 V (7.24%) | 384.9 V | 49.57 V (11.95%) | 15616.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 23.17 V (5.58%) | 391.8 V | 38.21 V (9.21%) | 12037.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 18.53 V (4.47%) | 396.5 V | 30.57 V (7.37%) | 9630.0 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 13.9 V (3.35%) | 401.1 V | 22.93 V (5.52%) | 7222.5 W | ~ ≤5% |
FAQ — 300 Amp Cable Size at 500 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 300A at 500 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 300A over 500m at 415V (voltage drop: 6.95V or 1.68%).
What is the power capacity of 300A at 415V?
At unity power factor, 300A at 415V supports 215.64 kW with a standard 300A circuit breaker.
Related Lengths & Currents (415V)
300A · 5m (415V)300A · 10m (415V)300A · 15m (415V)300A · 20m (415V)300A · 25m (415V)300A · 30m (415V)300A · 35m (415V)300A · 40m (415V)300A · 45m (415V)300A · 50m (415V)300A · 60m (415V)300A · 70m (415V)10A · 500m (415V)16A · 500m (415V)20A · 500m (415V)25A · 500m (415V)32A · 500m (415V)40A · 500m (415V)50A · 500m (415V)63A · 500m (415V)80A · 500m (415V)100A · 500m (415V)125A · 500m (415V)160A · 500m (415V)200A · 500m (415V)