90 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 90 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 10.67V (1.55%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 12.58V (1.82%)
Voltage at Load679.3 VLine Loss: 1664.1 W
Max Power & Breaker107.56 kW90A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 90A at 80m
| 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 | 177.92 V (25.78%) | 512.1 V | 293.48 V (42.53%) | 27734.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 106.75 V (15.47%) | 583.3 V | 176.09 V (25.52%) | 16640.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 66.72 V (9.67%) | 623.3 V | 110.05 V (15.95%) | 10400.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 44.48 V (6.45%) | 645.5 V | 73.37 V (10.63%) | 6933.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 26.69 V (3.87%) | 663.3 V | 44.02 V (6.38%) | 4160.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 16.68 V (2.42%) | 673.3 V | 27.51 V (3.99%) | 2600.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 10.67 V (1.55%) | 679.3 V | 17.61 V (2.55%) | 1664.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 7.62 V (1.11%) | 682.4 V | 12.58 V (1.82%) | 1188.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 5.34 V (0.77%) | 684.7 V | 8.8 V (1.28%) | 832.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 3.81 V (0.55%) | 686.2 V | 6.29 V (0.91%) | 594.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 2.81 V (0.41%) | 687.2 V | 4.63 V (0.67%) | 437.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 2.22 V (0.32%) | 687.8 V | 3.67 V (0.53%) | 346.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.78 V (0.26%) | 688.2 V | 2.93 V (0.43%) | 277.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.44 V (0.21%) | 688.6 V | 2.38 V (0.34%) | 224.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.11 V (0.16%) | 688.9 V | 1.83 V (0.27%) | 173.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.89 V (0.13%) | 689.1 V | 1.47 V (0.21%) | 138.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.67 V (0.1%) | 689.3 V | 1.1 V (0.16%) | 104.0 W | ✓ OK (≤3%) |
FAQ — 90 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 90A at 80 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 90A over 80m at 690V (voltage drop: 10.67V or 1.55%).
What is the power capacity of 90A at 690V?
At unity power factor, 90A at 690V supports 107.56 kW with a standard 90A circuit breaker.
Related Lengths & Currents (690V)
90A · 5m (690V)90A · 10m (690V)90A · 15m (690V)90A · 20m (690V)90A · 25m (690V)90A · 30m (690V)90A · 35m (690V)90A · 40m (690V)90A · 45m (690V)90A · 50m (690V)90A · 60m (690V)90A · 70m (690V)10A · 80m (690V)16A · 80m (690V)20A · 80m (690V)25A · 80m (690V)32A · 80m (690V)40A · 80m (690V)50A · 80m (690V)63A · 80m (690V)80A · 80m (690V)100A · 80m (690V)125A · 80m (690V)160A · 80m (690V)200A · 80m (690V)