425 Amp Cable Size at 30 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 30 m (98.4 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 1.58V (0.23%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.95V (0.28%)
Voltage at Load688.4 VLine Loss: 1159.6 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 30m
| 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 | 315.06 V (45.66%) | 374.9 V | 519.7 V (75.32%) | 231922.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 189.04 V (27.4%) | 501.0 V | 311.82 V (45.19%) | 139153.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 118.15 V (17.12%) | 571.9 V | 194.89 V (28.24%) | 86970.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 78.77 V (11.42%) | 611.2 V | 129.93 V (18.83%) | 57980.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 47.26 V (6.85%) | 642.7 V | 77.96 V (11.3%) | 34788.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 29.54 V (4.28%) | 660.5 V | 48.72 V (7.06%) | 21742.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 18.9 V (2.74%) | 671.1 V | 31.18 V (4.52%) | 13915.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 13.5 V (1.96%) | 676.5 V | 22.27 V (3.23%) | 9939.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 9.45 V (1.37%) | 680.5 V | 15.59 V (2.26%) | 6957.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 6.75 V (0.98%) | 683.2 V | 11.14 V (1.61%) | 4969.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.97 V (0.72%) | 685.0 V | 8.21 V (1.19%) | 3661.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.94 V (0.57%) | 686.1 V | 6.5 V (0.94%) | 2899.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.15 V (0.46%) | 686.8 V | 5.2 V (0.75%) | 2319.2 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.55 V (0.37%) | 687.4 V | 4.21 V (0.61%) | 1880.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.97 V (0.29%) | 688.0 V | 3.25 V (0.47%) | 1449.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.58 V (0.23%) | 688.4 V | 2.6 V (0.38%) | 1159.6 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.18 V (0.17%) | 688.8 V | 1.95 V (0.28%) | 869.7 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 30 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 30 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 425A over 30m at 690V (voltage drop: 1.58V or 0.23%).
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 · 35m (690V)425A · 40m (690V)425A · 45m (690V)425A · 50m (690V)425A · 60m (690V)425A · 70m (690V)10A · 30m (690V)16A · 30m (690V)20A · 30m (690V)25A · 30m (690V)32A · 30m (690V)40A · 30m (690V)50A · 30m (690V)63A · 30m (690V)80A · 30m (690V)100A · 30m (690V)125A · 30m (690V)160A · 30m (690V)200A · 30m (690V)