425 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 425 A over 400 m (1312.3 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 15.75V (2.28%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 25.99V (3.77%)
Voltage at Load674.2 VLine Loss: 11596.1 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A 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 | 4200.8 V (608.81%) | 0.0 V | 6929.36 V (1004.25%) | 3092300.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2520.48 V (365.29%) | 0.0 V | 4157.61 V (602.55%) | 1855380.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1575.3 V (228.3%) | 0.0 V | 2598.51 V (376.6%) | 1159612.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 1050.2 V (152.2%) | 0.0 V | 1732.34 V (251.06%) | 773075.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 630.12 V (91.32%) | 59.9 V | 1039.4 V (150.64%) | 463845.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 393.83 V (57.08%) | 296.2 V | 649.63 V (94.15%) | 289903.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 252.05 V (36.53%) | 438.0 V | 415.76 V (60.26%) | 185538.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 180.03 V (26.09%) | 510.0 V | 296.97 V (43.04%) | 132527.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 126.02 V (18.26%) | 564.0 V | 207.88 V (30.13%) | 92769.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 90.02 V (13.05%) | 600.0 V | 148.49 V (21.52%) | 66263.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 66.33 V (9.61%) | 623.7 V | 109.41 V (15.86%) | 48825.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 52.51 V (7.61%) | 637.5 V | 86.62 V (12.55%) | 38653.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 42.01 V (6.09%) | 648.0 V | 69.29 V (10.04%) | 30923.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 34.06 V (4.94%) | 655.9 V | 56.18 V (8.14%) | 25072.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 26.26 V (3.81%) | 663.7 V | 43.31 V (6.28%) | 19326.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 21.0 V (3.04%) | 669.0 V | 34.65 V (5.02%) | 15461.5 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 15.75 V (2.28%) | 674.2 V | 25.99 V (3.77%) | 11596.1 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 400 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 400 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 425A over 400m at 690V (voltage drop: 15.75V or 2.28%).
What is the power capacity of 425A at 690V?
At unity power factor, 425A at 690V supports 507.92 kW with a standard 450A circuit breaker.
Related Lengths & Currents (690V)
425A · 5m (690V)425A · 10m (690V)425A · 15m (690V)425A · 20m (690V)425A · 25m (690V)425A · 30m (690V)425A · 35m (690V)425A · 40m (690V)425A · 45m (690V)425A · 50m (690V)425A · 60m (690V)425A · 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)