15 Amp Cable Size at 90 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 90 m (295.3 ft).
Copper Cable (≤3% Drop)2.5 mm²Drop: 20.02V (2.9%)
Aluminum Cable (≤3% Drop)4 mm²Drop: 20.64V (2.99%)
Voltage at Load670.0 VLine Loss: 520.0 W
Max Power & Breaker17.93 kW15A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 15A at 90m
| 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 | 33.36 V (4.83%) | 656.6 V | 55.03 V (7.97%) | 866.7 W | ~ ≤5% |
| 2.5 mm² | 24 A | 18 A | 20.02 V (2.9%) | 670.0 V | 33.02 V (4.78%) | 520.0 W | ✓ OK (≤3%) |
| 4 mm² | 32 A | 25 A | 12.51 V (1.81%) | 677.5 V | 20.64 V (2.99%) | 325.0 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 8.34 V (1.21%) | 681.7 V | 13.76 V (1.99%) | 216.7 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 5.0 V (0.73%) | 685.0 V | 8.25 V (1.2%) | 130.0 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 3.13 V (0.45%) | 686.9 V | 5.16 V (0.75%) | 81.3 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 2.0 V (0.29%) | 688.0 V | 3.3 V (0.48%) | 52.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.43 V (0.21%) | 688.6 V | 2.36 V (0.34%) | 37.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.0 V (0.15%) | 689.0 V | 1.65 V (0.24%) | 26.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.71 V (0.1%) | 689.3 V | 1.18 V (0.17%) | 18.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.53 V (0.08%) | 689.5 V | 0.87 V (0.13%) | 13.7 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.42 V (0.06%) | 689.6 V | 0.69 V (0.1%) | 10.8 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.33 V (0.05%) | 689.7 V | 0.55 V (0.08%) | 8.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.27 V (0.04%) | 689.7 V | 0.45 V (0.06%) | 7.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.21 V (0.03%) | 689.8 V | 0.34 V (0.05%) | 5.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.17 V (0.02%) | 689.8 V | 0.28 V (0.04%) | 4.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.13 V (0.02%) | 689.9 V | 0.21 V (0.03%) | 3.3 W | ✓ OK (≤3%) |
FAQ — 15 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 15A at 90 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2.5 mm² copper cable for 15A over 90m at 690V (voltage drop: 20.02V or 2.9%).
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 · 50m (690V)15A · 60m (690V)15A · 70m (690V)10A · 90m (690V)16A · 90m (690V)20A · 90m (690V)25A · 90m (690V)32A · 90m (690V)40A · 90m (690V)50A · 90m (690V)63A · 90m (690V)80A · 90m (690V)100A · 90m (690V)125A · 90m (690V)160A · 90m (690V)200A · 90m (690V)