800 Amp Cable Size at 250 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 800 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 9.27V (2.23%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 30.57V (7.37%)
Voltage at Load405.7 VLine Loss: 12840.0 W
Max Power & Breaker575.04 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 250m
| 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 | 4942.12 V (1190.87%) | 0.0 V | 8152.19 V (1964.38%) | 6848000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2965.27 V (714.52%) | 0.0 V | 4891.31 V (1178.63%) | 4108800.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1853.29 V (446.58%) | 0.0 V | 3057.07 V (736.64%) | 2568000.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1235.53 V (297.72%) | 0.0 V | 2038.05 V (491.1%) | 1712000.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 741.32 V (178.63%) | 0.0 V | 1222.83 V (294.66%) | 1027200.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 463.32 V (111.64%) | 0.0 V | 764.27 V (184.16%) | 642000.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 296.53 V (71.45%) | 118.5 V | 489.13 V (117.86%) | 410880.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 211.81 V (51.04%) | 203.2 V | 349.38 V (84.19%) | 293485.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 148.26 V (35.73%) | 266.7 V | 244.57 V (58.93%) | 205440.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 105.9 V (25.52%) | 309.1 V | 174.69 V (42.09%) | 146742.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 78.03 V (18.8%) | 337.0 V | 128.72 V (31.02%) | 108126.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 61.78 V (14.89%) | 353.2 V | 101.9 V (24.55%) | 85600.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 49.42 V (11.91%) | 365.6 V | 81.52 V (19.64%) | 68480.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 40.07 V (9.66%) | 374.9 V | 66.1 V (15.93%) | 55524.3 W | Drop High |
| 240 mm² | 415 A | 324 A | 30.89 V (7.44%) | 384.1 V | 50.95 V (12.28%) | 42800.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 24.71 V (5.95%) | 390.3 V | 40.76 V (9.82%) | 34240.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 18.53 V (4.47%) | 396.5 V | 30.57 V (7.37%) | 25680.0 W | Drop High |
FAQ — 800 Amp Cable Size at 250 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 800A at 250 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 800A over 250m at 415V (voltage drop: 9.27V or 2.23%).
What is the power capacity of 800A at 415V?
At unity power factor, 800A at 415V supports 575.04 kW with a standard 800A circuit breaker.
Related Lengths & Currents (415V)
800A · 5m (415V)800A · 10m (415V)800A · 15m (415V)800A · 20m (415V)800A · 25m (415V)800A · 30m (415V)800A · 35m (415V)800A · 40m (415V)800A · 45m (415V)800A · 50m (415V)800A · 60m (415V)800A · 70m (415V)10A · 250m (415V)16A · 250m (415V)20A · 250m (415V)25A · 250m (415V)32A · 250m (415V)40A · 250m (415V)50A · 250m (415V)63A · 250m (415V)80A · 250m (415V)100A · 250m (415V)125A · 250m (415V)160A · 250m (415V)200A · 250m (415V)