325 Amp Cable Size at 40 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 40 m (131.2 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 2.6V (0.65%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 2.65V (0.66%)
Voltage at Load397.4 VLine Loss: 1466.2 W
Max Power & Breaker225.17 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 40m
| 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 | 321.24 V (80.31%) | 78.8 V | 529.89 V (132.47%) | 180830.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 192.74 V (48.19%) | 207.3 V | 317.94 V (79.48%) | 108498.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 120.46 V (30.12%) | 279.5 V | 198.71 V (49.68%) | 67811.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 80.31 V (20.08%) | 319.7 V | 132.47 V (33.12%) | 45207.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 48.19 V (12.05%) | 351.8 V | 79.48 V (19.87%) | 27124.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 30.12 V (7.53%) | 369.9 V | 49.68 V (12.42%) | 16952.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 19.27 V (4.82%) | 380.7 V | 31.79 V (7.95%) | 10849.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 13.77 V (3.44%) | 386.2 V | 22.71 V (5.68%) | 7749.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 9.64 V (2.41%) | 390.4 V | 15.9 V (3.97%) | 5424.9 W | Drop High |
| 70 mm² | 192 A | 150 A | 6.88 V (1.72%) | 393.1 V | 11.35 V (2.84%) | 3874.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 5.07 V (1.27%) | 394.9 V | 8.37 V (2.09%) | 2855.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 4.02 V (1.0%) | 396.0 V | 6.62 V (1.66%) | 2260.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.21 V (0.8%) | 396.8 V | 5.3 V (1.32%) | 1808.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.6 V (0.65%) | 397.4 V | 4.3 V (1.07%) | 1466.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 2.01 V (0.5%) | 398.0 V | 3.31 V (0.83%) | 1130.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.61 V (0.4%) | 398.4 V | 2.65 V (0.66%) | 904.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.2 V (0.3%) | 398.8 V | 1.99 V (0.5%) | 678.1 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 40 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 325A at 40 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 185 mm² copper cable for 325A over 40m at 400V (voltage drop: 2.6V or 0.65%).
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 · 45m (400V)325A · 50m (400V)325A · 60m (400V)325A · 70m (400V)10A · 40m (400V)16A · 40m (400V)20A · 40m (400V)25A · 40m (400V)32A · 40m (400V)40A · 40m (400V)50A · 40m (400V)63A · 40m (400V)80A · 40m (400V)100A · 40m (400V)125A · 40m (400V)160A · 40m (400V)200A · 40m (400V)