325 Amp Cable Size at 250 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 325 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 10.04V (2.51%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 12.42V (3.1%)
Voltage at Load390.0 VLine Loss: 5650.9 W
Max Power & Breaker225.17 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A 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 | 2007.74 V (501.93%) | 0.0 V | 3311.83 V (827.96%) | 1130187.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1204.64 V (301.16%) | 0.0 V | 1987.1 V (496.77%) | 678112.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 752.9 V (188.23%) | 0.0 V | 1241.93 V (310.48%) | 423820.3 W | Drop High |
| 6 mm² | 41 A | 32 A | 501.93 V (125.48%) | 0.0 V | 827.96 V (206.99%) | 282546.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 301.16 V (75.29%) | 98.8 V | 496.77 V (124.19%) | 169528.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 188.23 V (47.06%) | 211.8 V | 310.48 V (77.62%) | 105955.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 120.46 V (30.12%) | 279.5 V | 198.71 V (49.68%) | 67811.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 86.05 V (21.51%) | 314.0 V | 141.94 V (35.48%) | 48436.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 60.23 V (15.06%) | 339.8 V | 99.35 V (24.84%) | 33905.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 43.02 V (10.76%) | 357.0 V | 70.97 V (17.74%) | 24218.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 31.7 V (7.93%) | 368.3 V | 52.29 V (13.07%) | 17845.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 25.1 V (6.27%) | 374.9 V | 41.4 V (10.35%) | 14127.3 W | Drop High |
| 150 mm² | 309 A | 241 A | 20.08 V (5.02%) | 379.9 V | 33.12 V (8.28%) | 11301.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 16.28 V (4.07%) | 383.7 V | 26.85 V (6.71%) | 9163.7 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 12.55 V (3.14%) | 387.5 V | 20.7 V (5.17%) | 7063.7 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 10.04 V (2.51%) | 390.0 V | 16.56 V (4.14%) | 5650.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 7.53 V (1.88%) | 392.5 V | 12.42 V (3.1%) | 4238.2 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 250 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 325A at 250 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 325A over 250m at 400V (voltage drop: 10.04V or 2.51%).
What is the power capacity of 325A at 400V?
At unity power factor, 325A at 400V supports 225.17 kW with a standard 350A circuit breaker.
Related Lengths & Currents (400V)
325A · 5m (400V)325A · 10m (400V)325A · 15m (400V)325A · 20m (400V)325A · 25m (400V)325A · 30m (400V)325A · 35m (400V)325A · 40m (400V)325A · 45m (400V)325A · 50m (400V)325A · 60m (400V)325A · 70m (400V)10A · 250m (400V)16A · 250m (400V)20A · 250m (400V)25A · 250m (400V)32A · 250m (400V)40A · 250m (400V)50A · 250m (400V)63A · 250m (400V)80A · 250m (400V)100A · 250m (400V)125A · 250m (400V)160A · 250m (400V)200A · 250m (400V)