250 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 250 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)120 mm²Drop: 6.18V (1.49%)
Aluminum Cable (≤3% Drop)185 mm²Drop: 6.61V (1.59%)
Voltage at Load408.8 VLine Loss: 2675.0 W
Max Power & Breaker179.7 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A at 80m
| 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 | 494.21 V (119.09%) | 0.0 V | 815.22 V (196.44%) | 214000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 296.53 V (71.45%) | 118.5 V | 489.13 V (117.86%) | 128400.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 185.33 V (44.66%) | 229.7 V | 305.71 V (73.66%) | 80250.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 123.55 V (29.77%) | 291.4 V | 203.8 V (49.11%) | 53500.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 74.13 V (17.86%) | 340.9 V | 122.28 V (29.47%) | 32100.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 46.33 V (11.16%) | 368.7 V | 76.43 V (18.42%) | 20062.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 29.65 V (7.15%) | 385.3 V | 48.91 V (11.79%) | 12840.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 21.18 V (5.1%) | 393.8 V | 34.94 V (8.42%) | 9171.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 14.83 V (3.57%) | 400.2 V | 24.46 V (5.89%) | 6420.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 10.59 V (2.55%) | 404.4 V | 17.47 V (4.21%) | 4585.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.8 V (1.88%) | 407.2 V | 12.87 V (3.1%) | 3378.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.18 V (1.49%) | 408.8 V | 10.19 V (2.46%) | 2675.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 4.94 V (1.19%) | 410.1 V | 8.15 V (1.96%) | 2140.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 4.01 V (0.97%) | 411.0 V | 6.61 V (1.59%) | 1735.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.09 V (0.74%) | 411.9 V | 5.1 V (1.23%) | 1337.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.47 V (0.6%) | 412.5 V | 4.08 V (0.98%) | 1070.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.85 V (0.45%) | 413.1 V | 3.06 V (0.74%) | 802.5 W | ✓ OK (≤3%) |
FAQ — 250 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 250A at 80 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 120 mm² copper cable for 250A over 80m at 415V (voltage drop: 6.18V or 1.49%).
What is the power capacity of 250A at 415V?
At unity power factor, 250A at 415V supports 179.7 kW with a standard 250A circuit breaker.
Related Lengths & Currents (415V)
250A · 5m (415V)250A · 10m (415V)250A · 15m (415V)250A · 20m (415V)250A · 25m (415V)250A · 30m (415V)250A · 35m (415V)250A · 40m (415V)250A · 45m (415V)250A · 50m (415V)250A · 60m (415V)250A · 70m (415V)10A · 80m (415V)16A · 80m (415V)20A · 80m (415V)25A · 80m (415V)32A · 80m (415V)40A · 80m (415V)50A · 80m (415V)63A · 80m (415V)80A · 80m (415V)100A · 80m (415V)125A · 80m (415V)160A · 80m (415V)200A · 80m (415V)