35 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 35 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)10 mm²Drop: 15.57V (2.26%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 16.05V (2.33%)
Voltage at Load674.4 VLine Loss: 943.7 W
Max Power & Breaker41.83 kW35A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 35A 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 | 103.78 V (15.04%) | 586.2 V | 171.2 V (24.81%) | 6291.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 62.27 V (9.02%) | 627.7 V | 102.72 V (14.89%) | 3775.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 38.92 V (5.64%) | 651.1 V | 64.2 V (9.3%) | 2359.3 W | Drop High |
| 6 mm² | 41 A | 32 A | 25.95 V (3.76%) | 664.1 V | 42.8 V (6.2%) | 1572.9 W | ~ ≤5% |
| 10 mm² | 57 A | 44 A | 15.57 V (2.26%) | 674.4 V | 25.68 V (3.72%) | 943.7 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 9.73 V (1.41%) | 680.3 V | 16.05 V (2.33%) | 589.8 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 6.23 V (0.9%) | 683.8 V | 10.27 V (1.49%) | 377.5 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 4.45 V (0.64%) | 685.6 V | 7.34 V (1.06%) | 269.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 3.11 V (0.45%) | 686.9 V | 5.14 V (0.74%) | 188.7 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 2.22 V (0.32%) | 687.8 V | 3.67 V (0.53%) | 134.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.64 V (0.24%) | 688.4 V | 2.7 V (0.39%) | 99.3 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.3 V (0.19%) | 688.7 V | 2.14 V (0.31%) | 78.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.04 V (0.15%) | 689.0 V | 1.71 V (0.25%) | 62.9 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.84 V (0.12%) | 689.2 V | 1.39 V (0.2%) | 51.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.65 V (0.09%) | 689.4 V | 1.07 V (0.16%) | 39.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.52 V (0.08%) | 689.5 V | 0.86 V (0.12%) | 31.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.39 V (0.06%) | 689.6 V | 0.64 V (0.09%) | 23.6 W | ✓ OK (≤3%) |
FAQ — 35 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 35A at 120 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10 mm² copper cable for 35A over 120m at 690V (voltage drop: 15.57V or 2.26%).
What is the power capacity of 35A at 690V?
At unity power factor, 35A at 690V supports 41.83 kW with a standard 35A circuit breaker.
Related Lengths & Currents (690V)
35A · 5m (690V)35A · 10m (690V)35A · 15m (690V)35A · 20m (690V)35A · 25m (690V)35A · 30m (690V)35A · 35m (690V)35A · 40m (690V)35A · 45m (690V)35A · 50m (690V)35A · 60m (690V)35A · 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)