300 Amp Cable Size at 250 Meters (230V Single-Phase (IEC Europe / UK / AU))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 4.01V (1.75%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 13.24V (5.76%)
Voltage at Load226.0 VLine Loss: 1203.8 W
Max Power & Breaker69.0 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A 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 | 2140.0 V (930.43%) | 0.0 V | 3530.0 V (1534.78%) | 642000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1284.0 V (558.26%) | 0.0 V | 2118.0 V (920.87%) | 385200.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 802.5 V (348.91%) | 0.0 V | 1323.75 V (575.54%) | 240750.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 535.0 V (232.61%) | 0.0 V | 882.5 V (383.7%) | 160500.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 321.0 V (139.57%) | 0.0 V | 529.5 V (230.22%) | 96300.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 200.62 V (87.23%) | 29.4 V | 330.94 V (143.89%) | 60187.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 128.4 V (55.83%) | 101.6 V | 211.8 V (92.09%) | 38520.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 91.71 V (39.88%) | 138.3 V | 151.29 V (65.78%) | 27514.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 64.2 V (27.91%) | 165.8 V | 105.9 V (46.04%) | 19260.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 45.86 V (19.94%) | 184.1 V | 75.64 V (32.89%) | 13757.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 33.79 V (14.69%) | 196.2 V | 55.74 V (24.23%) | 10136.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 26.75 V (11.63%) | 203.2 V | 44.12 V (19.18%) | 8025.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 21.4 V (9.3%) | 208.6 V | 35.3 V (15.35%) | 6420.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 17.35 V (7.54%) | 212.6 V | 28.62 V (12.44%) | 5205.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 13.37 V (5.82%) | 216.6 V | 22.06 V (9.59%) | 4012.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 10.7 V (4.65%) | 219.3 V | 17.65 V (7.67%) | 3210.0 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 8.03 V (3.49%) | 222.0 V | 13.24 V (5.76%) | 2407.5 W | ~ ≤5% |
FAQ — 300 Amp Cable Size at 250 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 300A at 250 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 300A over 250m at 230V (voltage drop: 4.01V or 1.75%).
What is the power capacity of 300A at 230V?
At unity power factor, 300A at 230V supports 69.0 kW with a standard 300A circuit breaker.
Related Lengths & Currents (230V)
300A · 5m (230V)300A · 10m (230V)300A · 15m (230V)300A · 20m (230V)300A · 25m (230V)300A · 30m (230V)300A · 35m (230V)300A · 40m (230V)300A · 45m (230V)300A · 50m (230V)300A · 60m (230V)300A · 70m (230V)10A · 250m (230V)16A · 250m (230V)20A · 250m (230V)25A · 250m (230V)32A · 250m (230V)40A · 250m (230V)50A · 250m (230V)63A · 250m (230V)80A · 250m (230V)100A · 250m (230V)125A · 250m (230V)160A · 250m (230V)200A · 250m (230V)