900 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 900 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)10× 400 mm²Drop: 0.67V (2.81%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 11.12V (46.33%)
Voltage at Load23.3 VLine Loss: 606.7 W
Max Power & Breaker21.6 kW1000A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 900A at 70m
| 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 | 1797.6 V (7490.0%) | 0.0 V | 2965.2 V (12355.0%) | 1617840.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1078.56 V (4494.0%) | 0.0 V | 1779.12 V (7413.0%) | 970704.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 674.1 V (2808.75%) | 0.0 V | 1111.95 V (4633.12%) | 606690.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 449.4 V (1872.5%) | 0.0 V | 741.3 V (3088.75%) | 404460.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 269.64 V (1123.5%) | 0.0 V | 444.78 V (1853.25%) | 242676.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 168.53 V (702.19%) | 0.0 V | 277.99 V (1158.28%) | 151672.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 107.86 V (449.4%) | 0.0 V | 177.91 V (741.3%) | 97070.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 77.04 V (321.0%) | 0.0 V | 127.08 V (529.5%) | 69336.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 53.93 V (224.7%) | 0.0 V | 88.96 V (370.65%) | 48535.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 38.52 V (160.5%) | 0.0 V | 63.54 V (264.75%) | 34668.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 28.38 V (118.26%) | 0.0 V | 46.82 V (195.08%) | 25544.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 22.47 V (93.63%) | 1.5 V | 37.07 V (154.44%) | 20223.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 17.98 V (74.9%) | 6.0 V | 29.65 V (123.55%) | 16178.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 14.58 V (60.73%) | 9.4 V | 24.04 V (100.18%) | 13117.6 W | Drop High |
| 240 mm² | 415 A | 324 A | 11.24 V (46.81%) | 12.8 V | 18.53 V (77.22%) | 10111.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 8.99 V (37.45%) | 15.0 V | 14.83 V (61.77%) | 8089.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 6.74 V (28.09%) | 17.3 V | 11.12 V (46.33%) | 6066.9 W | Drop High |
FAQ — 900 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 900A at 70 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10× 400 mm² copper cable for 900A over 70m at 24V (voltage drop: 0.67V or 2.81%).
What is the power capacity of 900A at 24V?
At unity power factor, 900A at 24V supports 21.6 kW with a standard 1000A circuit breaker.
Related Lengths & Currents (24V)
900A · 5m (24V)900A · 10m (24V)900A · 15m (24V)900A · 20m (24V)900A · 25m (24V)900A · 30m (24V)900A · 35m (24V)900A · 40m (24V)900A · 45m (24V)900A · 50m (24V)900A · 60m (24V)10A · 70m (24V)16A · 70m (24V)20A · 70m (24V)25A · 70m (24V)32A · 70m (24V)40A · 70m (24V)50A · 70m (24V)63A · 70m (24V)80A · 70m (24V)100A · 70m (24V)125A · 70m (24V)160A · 70m (24V)200A · 70m (24V)