30 Amp Cable Size at 35 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 30 A over 35 m (114.8 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 9.73V (1.41%)
Aluminum Cable (≤3% Drop)6 mm²Drop: 10.7V (1.55%)
Voltage at Load680.3 VLine Loss: 505.6 W
Max Power & Breaker35.85 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A at 35m
| 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 | 25.95 V (3.76%) | 664.1 V | 42.8 V (6.2%) | 1348.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 15.57 V (2.26%) | 674.4 V | 25.68 V (3.72%) | 808.9 W | Drop High |
| 4 mm² | 32 A | 25 A | 9.73 V (1.41%) | 680.3 V | 16.05 V (2.33%) | 505.6 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 6.49 V (0.94%) | 683.5 V | 10.7 V (1.55%) | 337.1 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 3.89 V (0.56%) | 686.1 V | 6.42 V (0.93%) | 202.2 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 2.43 V (0.35%) | 687.6 V | 4.01 V (0.58%) | 126.4 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.56 V (0.23%) | 688.4 V | 2.57 V (0.37%) | 80.9 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.11 V (0.16%) | 688.9 V | 1.83 V (0.27%) | 57.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.78 V (0.11%) | 689.2 V | 1.28 V (0.19%) | 40.4 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.56 V (0.08%) | 689.4 V | 0.92 V (0.13%) | 28.9 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.41 V (0.06%) | 689.6 V | 0.68 V (0.1%) | 21.3 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.32 V (0.05%) | 689.7 V | 0.53 V (0.08%) | 16.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.26 V (0.04%) | 689.7 V | 0.43 V (0.06%) | 13.5 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.21 V (0.03%) | 689.8 V | 0.35 V (0.05%) | 10.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.16 V (0.02%) | 689.8 V | 0.27 V (0.04%) | 8.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.13 V (0.02%) | 689.9 V | 0.21 V (0.03%) | 6.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.1 V (0.01%) | 689.9 V | 0.16 V (0.02%) | 5.1 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 35 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 30A at 35 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4 mm² copper cable for 30A over 35m at 690V (voltage drop: 9.73V or 1.41%).
What is the power capacity of 30A at 690V?
At unity power factor, 30A at 690V supports 35.85 kW with a standard 30A circuit breaker.
Related Lengths & Currents (690V)
30A · 5m (690V)30A · 10m (690V)30A · 15m (690V)30A · 20m (690V)30A · 25m (690V)30A · 30m (690V)30A · 40m (690V)30A · 45m (690V)30A · 50m (690V)30A · 60m (690V)30A · 70m (690V)10A · 35m (690V)16A · 35m (690V)20A · 35m (690V)25A · 35m (690V)32A · 35m (690V)40A · 35m (690V)50A · 35m (690V)63A · 35m (690V)80A · 35m (690V)100A · 35m (690V)125A · 35m (690V)160A · 35m (690V)200A · 35m (690V)