900 Amp Cable Size at 400 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 400 m (1312.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 16.68V (2.42%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 55.03V (7.97%)
Voltage at Load673.3 VLine Loss: 26001.0 W
Max Power & Breaker1075.6 kW1000A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 900A at 400m
| 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 | 8895.81 V (1289.25%) | 0.0 V | 14673.93 V (2126.66%) | 13867200.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 5337.49 V (773.55%) | 0.0 V | 8804.36 V (1275.99%) | 8320320.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 3335.93 V (483.47%) | 0.0 V | 5502.73 V (797.5%) | 5200200.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 2223.95 V (322.31%) | 0.0 V | 3668.48 V (531.66%) | 3466800.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 1334.37 V (193.39%) | 0.0 V | 2201.09 V (319.0%) | 2080080.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 833.98 V (120.87%) | 0.0 V | 1375.68 V (199.37%) | 1300050.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 533.75 V (77.35%) | 156.3 V | 880.44 V (127.6%) | 832032.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 381.25 V (55.25%) | 308.8 V | 628.88 V (91.14%) | 594308.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 266.87 V (38.68%) | 423.1 V | 440.22 V (63.8%) | 416016.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 190.62 V (27.63%) | 499.4 V | 314.44 V (45.57%) | 297154.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 140.46 V (20.36%) | 549.5 V | 231.69 V (33.58%) | 218955.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 111.2 V (16.12%) | 578.8 V | 183.42 V (26.58%) | 173340.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 88.96 V (12.89%) | 601.0 V | 146.74 V (21.27%) | 138672.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 72.13 V (10.45%) | 617.9 V | 118.98 V (17.24%) | 112436.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 55.6 V (8.06%) | 634.4 V | 91.71 V (13.29%) | 86670.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 44.48 V (6.45%) | 645.5 V | 73.37 V (10.63%) | 69336.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 33.36 V (4.83%) | 656.6 V | 55.03 V (7.97%) | 52002.0 W | Drop High |
FAQ — 900 Amp Cable Size at 400 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 900A at 400 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 400m at 690V (voltage drop: 16.68V or 2.42%).
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 · 400m (690V)16A · 400m (690V)20A · 400m (690V)25A · 400m (690V)32A · 400m (690V)40A · 400m (690V)50A · 400m (690V)63A · 400m (690V)80A · 400m (690V)100A · 400m (690V)125A · 400m (690V)160A · 400m (690V)200A · 400m (690V)