90 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 16.01V (2.32%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 18.87V (2.73%)
Voltage at Load674.0 VLine Loss: 2496.1 W
Max Power & Breaker107.56 kW90A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 90A at 120m
| 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 | 266.87 V (38.68%) | 423.1 V | 440.22 V (63.8%) | 41601.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 160.12 V (23.21%) | 529.9 V | 264.13 V (38.28%) | 24961.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 100.08 V (14.5%) | 589.9 V | 165.08 V (23.92%) | 15600.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 66.72 V (9.67%) | 623.3 V | 110.05 V (15.95%) | 10400.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 40.03 V (5.8%) | 650.0 V | 66.03 V (9.57%) | 6240.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 25.02 V (3.63%) | 665.0 V | 41.27 V (5.98%) | 3900.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 16.01 V (2.32%) | 674.0 V | 26.41 V (3.83%) | 2496.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 11.44 V (1.66%) | 678.6 V | 18.87 V (2.73%) | 1782.9 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 8.01 V (1.16%) | 682.0 V | 13.21 V (1.91%) | 1248.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 5.72 V (0.83%) | 684.3 V | 9.43 V (1.37%) | 891.5 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 4.21 V (0.61%) | 685.8 V | 6.95 V (1.01%) | 656.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 3.34 V (0.48%) | 686.7 V | 5.5 V (0.8%) | 520.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 2.67 V (0.39%) | 687.3 V | 4.4 V (0.64%) | 416.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 2.16 V (0.31%) | 687.8 V | 3.57 V (0.52%) | 337.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.67 V (0.24%) | 688.3 V | 2.75 V (0.4%) | 260.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.33 V (0.19%) | 688.7 V | 2.2 V (0.32%) | 208.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.0 V (0.15%) | 689.0 V | 1.65 V (0.24%) | 156.0 W | ✓ OK (≤3%) |
FAQ — 90 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 90A at 120 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 120m at 690V (voltage drop: 16.01V or 2.32%).
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 · 120m (690V)16A · 120m (690V)20A · 120m (690V)25A · 120m (690V)32A · 120m (690V)40A · 120m (690V)50A · 120m (690V)63A · 120m (690V)80A · 120m (690V)100A · 120m (690V)125A · 120m (690V)160A · 120m (690V)200A · 120m (690V)