700 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 700 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 0.65V (0.15%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.14V (0.52%)
Voltage at Load414.4 VLine Loss: 786.5 W
Max Power & Breaker503.16 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 700A 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 | 345.95 V (83.36%) | 69.1 V | 570.65 V (137.51%) | 419440.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 207.57 V (50.02%) | 207.4 V | 342.39 V (82.5%) | 251664.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 129.73 V (31.26%) | 285.3 V | 213.99 V (51.57%) | 157290.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 86.49 V (20.84%) | 328.5 V | 142.66 V (34.38%) | 104860.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 51.89 V (12.5%) | 363.1 V | 85.6 V (20.63%) | 62916.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 32.43 V (7.82%) | 382.6 V | 53.5 V (12.89%) | 39322.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 20.76 V (5.0%) | 394.2 V | 34.24 V (8.25%) | 25166.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 14.83 V (3.57%) | 400.2 V | 24.46 V (5.89%) | 17976.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 10.38 V (2.5%) | 404.6 V | 17.12 V (4.13%) | 12583.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 7.41 V (1.79%) | 407.6 V | 12.23 V (2.95%) | 8988.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 5.46 V (1.32%) | 409.5 V | 9.01 V (2.17%) | 6622.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 4.32 V (1.04%) | 410.7 V | 7.13 V (1.72%) | 5243.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.46 V (0.83%) | 411.5 V | 5.71 V (1.38%) | 4194.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.8 V (0.68%) | 412.2 V | 4.63 V (1.11%) | 3400.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.16 V (0.52%) | 412.8 V | 3.57 V (0.86%) | 2621.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.73 V (0.42%) | 413.3 V | 2.85 V (0.69%) | 2097.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.3 V (0.31%) | 413.7 V | 2.14 V (0.52%) | 1572.9 W | Drop High |
FAQ — 700 Amp Cable Size at 20 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 700A at 20 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 700A over 20m at 415V (voltage drop: 0.65V or 0.15%).
What is the power capacity of 700A at 415V?
At unity power factor, 700A at 415V supports 503.16 kW with a standard 700A circuit breaker.
Related Lengths & Currents (415V)
700A · 5m (415V)700A · 10m (415V)700A · 15m (415V)700A · 25m (415V)700A · 30m (415V)700A · 35m (415V)700A · 40m (415V)700A · 45m (415V)700A · 50m (415V)700A · 60m (415V)700A · 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)