15 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 15 A over 50 m (164.0 ft).
Copper Cable (≤3% Drop)1.5 mm²Drop: 18.53V (2.69%)
Aluminum Cable (≤3% Drop)2.5 mm²Drop: 18.34V (2.66%)
Voltage at Load671.5 VLine Loss: 481.5 W
Max Power & Breaker17.93 kW15A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 15A 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 | 18.53 V (2.69%) | 671.5 V | 30.57 V (4.43%) | 481.5 W | ✓ OK (≤3%) |
| 2.5 mm² | 24 A | 18 A | 11.12 V (1.61%) | 678.9 V | 18.34 V (2.66%) | 288.9 W | ✓ OK (≤3%) |
| 4 mm² | 32 A | 25 A | 6.95 V (1.01%) | 683.1 V | 11.46 V (1.66%) | 180.6 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 4.63 V (0.67%) | 685.4 V | 7.64 V (1.11%) | 120.4 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 2.78 V (0.4%) | 687.2 V | 4.59 V (0.66%) | 72.2 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 1.74 V (0.25%) | 688.3 V | 2.87 V (0.42%) | 45.1 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.11 V (0.16%) | 688.9 V | 1.83 V (0.27%) | 28.9 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.79 V (0.12%) | 689.2 V | 1.31 V (0.19%) | 20.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.56 V (0.08%) | 689.4 V | 0.92 V (0.13%) | 14.4 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.4 V (0.06%) | 689.6 V | 0.66 V (0.09%) | 10.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.29 V (0.04%) | 689.7 V | 0.48 V (0.07%) | 7.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.23 V (0.03%) | 689.8 V | 0.38 V (0.06%) | 6.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.19 V (0.03%) | 689.8 V | 0.31 V (0.04%) | 4.8 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.15 V (0.02%) | 689.8 V | 0.25 V (0.04%) | 3.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.12 V (0.02%) | 689.9 V | 0.19 V (0.03%) | 3.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.09 V (0.01%) | 689.9 V | 0.15 V (0.02%) | 2.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.07 V (0.01%) | 689.9 V | 0.11 V (0.02%) | 1.8 W | ✓ OK (≤3%) |
FAQ — 15 Amp Cable Size at 50 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 15A at 50 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 1.5 mm² copper cable for 15A over 50m at 690V (voltage drop: 18.53V or 2.69%).
What is the power capacity of 15A at 690V?
At unity power factor, 15A at 690V supports 17.93 kW with a standard 15A circuit breaker.
Related Lengths & Currents (690V)
15A · 5m (690V)15A · 10m (690V)15A · 15m (690V)15A · 20m (690V)15A · 25m (690V)15A · 30m (690V)15A · 35m (690V)15A · 40m (690V)15A · 45m (690V)15A · 60m (690V)15A · 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)