900 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 900 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 5.0V (0.72%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 16.51V (2.39%)
Voltage at Load685.0 VLine Loss: 7800.3 W
Max Power & Breaker1075.6 kW1000A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 900A 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 | 2668.74 V (386.77%) | 0.0 V | 4402.18 V (638.0%) | 4160160.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1601.25 V (232.06%) | 0.0 V | 2641.31 V (382.8%) | 2496096.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1000.78 V (145.04%) | 0.0 V | 1650.82 V (239.25%) | 1560060.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 667.19 V (96.69%) | 22.8 V | 1100.55 V (159.5%) | 1040040.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 400.31 V (58.02%) | 289.7 V | 660.33 V (95.7%) | 624024.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 250.19 V (36.26%) | 439.8 V | 412.7 V (59.81%) | 390015.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 160.12 V (23.21%) | 529.9 V | 264.13 V (38.28%) | 249609.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 114.37 V (16.58%) | 575.6 V | 188.66 V (27.34%) | 178292.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 80.06 V (11.6%) | 609.9 V | 132.07 V (19.14%) | 124804.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 57.19 V (8.29%) | 632.8 V | 94.33 V (13.67%) | 89146.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 42.14 V (6.11%) | 647.9 V | 69.51 V (10.07%) | 65686.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 33.36 V (4.83%) | 656.6 V | 55.03 V (7.97%) | 52002.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 26.69 V (3.87%) | 663.3 V | 44.02 V (6.38%) | 41601.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 21.64 V (3.14%) | 668.4 V | 35.69 V (5.17%) | 33731.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 16.68 V (2.42%) | 673.3 V | 27.51 V (3.99%) | 26001.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 13.34 V (1.93%) | 676.7 V | 22.01 V (3.19%) | 20800.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 10.01 V (1.45%) | 680.0 V | 16.51 V (2.39%) | 15600.6 W | Drop High |
FAQ — 900 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 900A at 120 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 900A over 120m at 690V (voltage drop: 5.0V or 0.72%).
What is the power capacity of 900A at 690V?
At unity power factor, 900A at 690V supports 1075.6 kW with a standard 1000A circuit breaker.
Related Lengths & Currents (690V)
900A · 5m (690V)900A · 10m (690V)900A · 15m (690V)900A · 20m (690V)900A · 25m (690V)900A · 30m (690V)900A · 35m (690V)900A · 40m (690V)900A · 45m (690V)900A · 50m (690V)900A · 60m (690V)900A · 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)