350 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 350 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 8.41V (1.22%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 8.56V (1.24%)
Voltage at Load681.6 VLine Loss: 5101.3 W
Max Power & Breaker418.29 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 350A at 120m
| 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 | 1037.84 V (150.41%) | 0.0 V | 1711.96 V (248.11%) | 629160.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 622.71 V (90.25%) | 67.3 V | 1027.18 V (148.87%) | 377496.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 389.19 V (56.4%) | 300.8 V | 641.98 V (93.04%) | 235935.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 259.46 V (37.6%) | 430.5 V | 427.99 V (62.03%) | 157290.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 155.68 V (22.56%) | 534.3 V | 256.79 V (37.22%) | 94374.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 97.3 V (14.1%) | 592.7 V | 160.5 V (23.26%) | 58983.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 62.27 V (9.02%) | 627.7 V | 102.72 V (14.89%) | 37749.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 44.48 V (6.45%) | 645.5 V | 73.37 V (10.63%) | 26964.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 31.14 V (4.51%) | 658.9 V | 51.36 V (7.44%) | 18874.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 22.24 V (3.22%) | 667.8 V | 36.68 V (5.32%) | 13482.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 16.39 V (2.37%) | 673.6 V | 27.03 V (3.92%) | 9934.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 7864.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 10.38 V (1.5%) | 679.6 V | 17.12 V (2.48%) | 6291.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 8.41 V (1.22%) | 681.6 V | 13.88 V (2.01%) | 5101.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 6.49 V (0.94%) | 683.5 V | 10.7 V (1.55%) | 3932.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 5.19 V (0.75%) | 684.8 V | 8.56 V (1.24%) | 3145.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.89 V (0.56%) | 686.1 V | 6.42 V (0.93%) | 2359.3 W | ✓ OK (≤3%) |
FAQ — 350 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 350A at 120 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 185 mm² copper cable for 350A over 120m at 690V (voltage drop: 8.41V or 1.22%).
What is the power capacity of 350A at 690V?
At unity power factor, 350A at 690V supports 418.29 kW with a standard 350A circuit breaker.
Related Lengths & Currents (690V)
350A · 5m (690V)350A · 10m (690V)350A · 15m (690V)350A · 20m (690V)350A · 25m (690V)350A · 30m (690V)350A · 35m (690V)350A · 40m (690V)350A · 45m (690V)350A · 50m (690V)350A · 60m (690V)350A · 70m (690V)10A · 120m (690V)16A · 120m (690V)20A · 120m (690V)25A · 120m (690V)32A · 120m (690V)40A · 120m (690V)50A · 120m (690V)63A · 120m (690V)80A · 120m (690V)100A · 120m (690V)125A · 120m (690V)160A · 120m (690V)200A · 120m (690V)