90 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 90 A over 90 m (295.3 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 12.01V (1.74%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 14.15V (2.05%)
Voltage at Load678.0 VLine Loss: 1872.1 W
Max Power & Breaker107.56 kW90A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 90A 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 | 200.16 V (29.01%) | 489.8 V | 330.16 V (47.85%) | 31201.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 120.09 V (17.4%) | 569.9 V | 198.1 V (28.71%) | 18720.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 75.06 V (10.88%) | 614.9 V | 123.81 V (17.94%) | 11700.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 50.04 V (7.25%) | 640.0 V | 82.54 V (11.96%) | 7800.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 30.02 V (4.35%) | 660.0 V | 49.52 V (7.18%) | 4680.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 18.76 V (2.72%) | 671.2 V | 30.95 V (4.49%) | 2925.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 12.01 V (1.74%) | 678.0 V | 19.81 V (2.87%) | 1872.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 8.58 V (1.24%) | 681.4 V | 14.15 V (2.05%) | 1337.2 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 6.0 V (0.87%) | 684.0 V | 9.9 V (1.44%) | 936.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 4.29 V (0.62%) | 685.7 V | 7.07 V (1.03%) | 668.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 3.16 V (0.46%) | 686.8 V | 5.21 V (0.76%) | 492.7 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 2.5 V (0.36%) | 687.5 V | 4.13 V (0.6%) | 390.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 2.0 V (0.29%) | 688.0 V | 3.3 V (0.48%) | 312.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.62 V (0.24%) | 688.4 V | 2.68 V (0.39%) | 253.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.25 V (0.18%) | 688.7 V | 2.06 V (0.3%) | 195.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.0 V (0.15%) | 689.0 V | 1.65 V (0.24%) | 156.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.75 V (0.11%) | 689.2 V | 1.24 V (0.18%) | 117.0 W | ✓ OK (≤3%) |
FAQ — 90 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 90A at 90 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 90m at 690V (voltage drop: 12.01V or 1.74%).
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 · 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)