325 Amp Cable Size at 400 Meters (415V Three-Phase (UK / Australia 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)400 mm²Drop: 12.05V (2.9%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 19.87V (4.79%)
Voltage at Load403.0 VLine Loss: 6781.1 W
Max Power & Breaker233.61 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 (774.07%) | 0.0 V | 5298.92 V (1276.85%) | 1808300.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1927.43 V (464.44%) | 0.0 V | 3179.35 V (766.11%) | 1084980.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1204.64 V (290.28%) | 0.0 V | 1987.1 V (478.82%) | 678112.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 803.09 V (193.52%) | 0.0 V | 1324.73 V (319.21%) | 452075.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 481.86 V (116.11%) | 0.0 V | 794.84 V (191.53%) | 271245.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 301.16 V (72.57%) | 113.8 V | 496.77 V (119.7%) | 169528.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 192.74 V (46.44%) | 222.3 V | 317.94 V (76.61%) | 108498.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 137.67 V (33.17%) | 277.3 V | 227.1 V (54.72%) | 77498.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 96.37 V (23.22%) | 318.6 V | 158.97 V (38.31%) | 54249.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 68.84 V (16.59%) | 346.2 V | 113.55 V (27.36%) | 38749.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 50.72 V (12.22%) | 364.3 V | 83.67 V (20.16%) | 28552.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 40.15 V (9.68%) | 374.8 V | 66.24 V (15.96%) | 22603.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 32.12 V (7.74%) | 382.9 V | 52.99 V (12.77%) | 18083.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 26.05 V (6.28%) | 389.0 V | 42.96 V (10.35%) | 14661.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 20.08 V (4.84%) | 394.9 V | 33.12 V (7.98%) | 11301.9 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 16.06 V (3.87%) | 398.9 V | 26.49 V (6.38%) | 9041.5 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 12.05 V (2.9%) | 403.0 V | 19.87 V (4.79%) | 6781.1 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 400 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 325A at 400 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 325A over 400m at 415V (voltage drop: 12.05V or 2.9%).
What is the power capacity of 325A at 415V?
At unity power factor, 325A at 415V supports 233.61 kW with a standard 350A circuit breaker.
Related Lengths & Currents (415V)
325A · 5m (415V)325A · 10m (415V)325A · 15m (415V)325A · 20m (415V)325A · 25m (415V)325A · 30m (415V)325A · 35m (415V)325A · 40m (415V)325A · 45m (415V)325A · 50m (415V)325A · 60m (415V)325A · 70m (415V)10A · 400m (415V)16A · 400m (415V)20A · 400m (415V)25A · 400m (415V)32A · 400m (415V)40A · 400m (415V)50A · 400m (415V)63A · 400m (415V)80A · 400m (415V)100A · 400m (415V)125A · 400m (415V)160A · 400m (415V)200A · 400m (415V)