90 Amp Cable Size at 120 Meters (400V Three-Phase (IEC European Grid))
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)35 mm²Drop: 11.44V (2.86%)
Aluminum Cable (≤3% Drop)70 mm²Drop: 9.43V (2.36%)
Voltage at Load388.6 VLine Loss: 1782.9 W
Max Power & Breaker62.35 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 (66.72%) | 133.1 V | 440.22 V (110.05%) | 41601.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 160.12 V (40.03%) | 239.9 V | 264.13 V (66.03%) | 24961.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 100.08 V (25.02%) | 299.9 V | 165.08 V (41.27%) | 15600.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 66.72 V (16.68%) | 333.3 V | 110.05 V (27.51%) | 10400.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 40.03 V (10.01%) | 360.0 V | 66.03 V (16.51%) | 6240.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 25.02 V (6.25%) | 375.0 V | 41.27 V (10.32%) | 3900.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 16.01 V (4.0%) | 384.0 V | 26.41 V (6.6%) | 2496.1 W | ~ ≤5% |
| 35 mm² | 125 A | 97 A | 11.44 V (2.86%) | 388.6 V | 18.87 V (4.72%) | 1782.9 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 8.01 V (2.0%) | 392.0 V | 13.21 V (3.3%) | 1248.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 5.72 V (1.43%) | 394.3 V | 9.43 V (2.36%) | 891.5 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 4.21 V (1.05%) | 395.8 V | 6.95 V (1.74%) | 656.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 3.34 V (0.83%) | 396.7 V | 5.5 V (1.38%) | 520.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 2.67 V (0.67%) | 397.3 V | 4.4 V (1.1%) | 416.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 2.16 V (0.54%) | 397.8 V | 3.57 V (0.89%) | 337.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.67 V (0.42%) | 398.3 V | 2.75 V (0.69%) | 260.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.33 V (0.33%) | 398.7 V | 2.2 V (0.55%) | 208.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.0 V (0.25%) | 399.0 V | 1.65 V (0.41%) | 156.0 W | ✓ OK (≤3%) |
FAQ — 90 Amp Cable Size at 120 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 90A at 120 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 90A over 120m at 400V (voltage drop: 11.44V or 2.86%).
What is the power capacity of 90A at 400V?
At unity power factor, 90A at 400V supports 62.35 kW with a standard 90A circuit breaker.
Related Lengths & Currents (400V)
90A · 5m (400V)90A · 10m (400V)90A · 15m (400V)90A · 20m (400V)90A · 25m (400V)90A · 30m (400V)90A · 35m (400V)90A · 40m (400V)90A · 45m (400V)90A · 50m (400V)90A · 60m (400V)90A · 70m (400V)10A · 120m (400V)16A · 120m (400V)20A · 120m (400V)25A · 120m (400V)32A · 120m (400V)40A · 120m (400V)50A · 120m (400V)63A · 120m (400V)80A · 120m (400V)100A · 120m (400V)125A · 120m (400V)160A · 120m (400V)200A · 120m (400V)