325 Amp Cable Size at 400 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 325 A over 400 m (1312.3 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 20.08V (2.91%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 19.87V (2.88%)
Voltage at Load669.9 VLine Loss: 11301.9 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 400m
| 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 | 3212.38 V (465.56%) | 0.0 V | 5298.92 V (767.96%) | 1808300.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1927.43 V (279.34%) | 0.0 V | 3179.35 V (460.78%) | 1084980.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1204.64 V (174.59%) | 0.0 V | 1987.1 V (287.98%) | 678112.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 803.09 V (116.39%) | 0.0 V | 1324.73 V (191.99%) | 452075.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 481.86 V (69.83%) | 208.1 V | 794.84 V (115.19%) | 271245.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 301.16 V (43.65%) | 388.8 V | 496.77 V (72.0%) | 169528.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 192.74 V (27.93%) | 497.3 V | 317.94 V (46.08%) | 108498.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 137.67 V (19.95%) | 552.3 V | 227.1 V (32.91%) | 77498.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 96.37 V (13.97%) | 593.6 V | 158.97 V (23.04%) | 54249.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 68.84 V (9.98%) | 621.2 V | 113.55 V (16.46%) | 38749.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 50.72 V (7.35%) | 639.3 V | 83.67 V (12.13%) | 28552.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 40.15 V (5.82%) | 649.8 V | 66.24 V (9.6%) | 22603.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 32.12 V (4.66%) | 657.9 V | 52.99 V (7.68%) | 18083.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 26.05 V (3.77%) | 664.0 V | 42.96 V (6.23%) | 14661.9 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 20.08 V (2.91%) | 669.9 V | 33.12 V (4.8%) | 11301.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 16.06 V (2.33%) | 673.9 V | 26.49 V (3.84%) | 9041.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 12.05 V (1.75%) | 678.0 V | 19.87 V (2.88%) | 6781.1 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 400 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 400 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 325A over 400m at 690V (voltage drop: 20.08V or 2.91%).
What is the power capacity of 325A at 690V?
At unity power factor, 325A at 690V supports 388.41 kW with a standard 350A circuit breaker.
Related Lengths & Currents (690V)
325A · 5m (690V)325A · 10m (690V)325A · 15m (690V)325A · 20m (690V)325A · 25m (690V)325A · 30m (690V)325A · 35m (690V)325A · 40m (690V)325A · 45m (690V)325A · 50m (690V)325A · 60m (690V)325A · 70m (690V)10A · 400m (690V)16A · 400m (690V)20A · 400m (690V)25A · 400m (690V)32A · 400m (690V)40A · 400m (690V)50A · 400m (690V)63A · 400m (690V)80A · 400m (690V)100A · 400m (690V)125A · 400m (690V)160A · 400m (690V)200A · 400m (690V)