30 Amp Cable Size at 50 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 50 m (164.0 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 13.9V (2.01%)
Aluminum Cable (≤3% Drop)6 mm²Drop: 15.29V (2.22%)
Voltage at Load676.1 VLine Loss: 722.2 W
Max Power & Breaker35.85 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A at 50m
| 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 | 37.07 V (5.37%) | 652.9 V | 61.14 V (8.86%) | 1926.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 22.24 V (3.22%) | 667.8 V | 36.68 V (5.32%) | 1155.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 722.2 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 9.27 V (1.34%) | 680.7 V | 15.29 V (2.22%) | 481.5 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 5.56 V (0.81%) | 684.4 V | 9.17 V (1.33%) | 288.9 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 3.47 V (0.5%) | 686.5 V | 5.73 V (0.83%) | 180.6 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 2.22 V (0.32%) | 687.8 V | 3.67 V (0.53%) | 115.6 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.59 V (0.23%) | 688.4 V | 2.62 V (0.38%) | 82.5 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.11 V (0.16%) | 688.9 V | 1.83 V (0.27%) | 57.8 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.79 V (0.12%) | 689.2 V | 1.31 V (0.19%) | 41.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.59 V (0.08%) | 689.4 V | 0.97 V (0.14%) | 30.4 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.46 V (0.07%) | 689.5 V | 0.76 V (0.11%) | 24.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.37 V (0.05%) | 689.6 V | 0.61 V (0.09%) | 19.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.3 V (0.04%) | 689.7 V | 0.5 V (0.07%) | 15.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.23 V (0.03%) | 689.8 V | 0.38 V (0.06%) | 12.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.19 V (0.03%) | 689.8 V | 0.31 V (0.04%) | 9.6 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.14 V (0.02%) | 689.9 V | 0.23 V (0.03%) | 7.2 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 50 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 30A at 50 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 50m at 690V (voltage drop: 13.9V or 2.01%).
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 · 35m (690V)30A · 40m (690V)30A · 45m (690V)30A · 60m (690V)30A · 70m (690V)10A · 50m (690V)16A · 50m (690V)20A · 50m (690V)25A · 50m (690V)32A · 50m (690V)40A · 50m (690V)50A · 50m (690V)63A · 50m (690V)80A · 50m (690V)100A · 50m (690V)125A · 50m (690V)160A · 50m (690V)200A · 50m (690V)