900 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 1.88V (0.27%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 6.19V (0.9%)
Voltage at Load688.1 VLine Loss: 2925.1 W
Max Power & Breaker1075.6 kW1000A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 900A at 45m
| 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 | 1000.78 V (145.04%) | 0.0 V | 1650.82 V (239.25%) | 1560060.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 600.47 V (87.02%) | 89.5 V | 990.49 V (143.55%) | 936036.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 375.29 V (54.39%) | 314.7 V | 619.06 V (89.72%) | 585022.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 250.19 V (36.26%) | 439.8 V | 412.7 V (59.81%) | 390015.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 150.12 V (21.76%) | 539.9 V | 247.62 V (35.89%) | 234009.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 93.82 V (13.6%) | 596.2 V | 154.76 V (22.43%) | 146255.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 60.05 V (8.7%) | 630.0 V | 99.05 V (14.35%) | 93603.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 42.89 V (6.22%) | 647.1 V | 70.75 V (10.25%) | 66859.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 30.02 V (4.35%) | 660.0 V | 49.52 V (7.18%) | 46801.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 21.45 V (3.11%) | 668.6 V | 35.37 V (5.13%) | 33429.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 15.8 V (2.29%) | 674.2 V | 26.07 V (3.78%) | 24632.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 12.51 V (1.81%) | 677.5 V | 20.64 V (2.99%) | 19500.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 10.01 V (1.45%) | 680.0 V | 16.51 V (2.39%) | 15600.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 8.11 V (1.18%) | 681.9 V | 13.39 V (1.94%) | 12649.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 6.25 V (0.91%) | 683.7 V | 10.32 V (1.5%) | 9750.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 5.0 V (0.73%) | 685.0 V | 8.25 V (1.2%) | 7800.3 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.75 V (0.54%) | 686.2 V | 6.19 V (0.9%) | 5850.2 W | Drop High |
FAQ — 900 Amp Cable Size at 45 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 900A at 45 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 45m at 690V (voltage drop: 1.88V or 0.27%).
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 · 50m (690V)900A · 60m (690V)900A · 70m (690V)10A · 45m (690V)16A · 45m (690V)20A · 45m (690V)25A · 45m (690V)32A · 45m (690V)40A · 45m (690V)50A · 45m (690V)63A · 45m (690V)80A · 45m (690V)100A · 45m (690V)125A · 45m (690V)160A · 45m (690V)200A · 45m (690V)