900 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)17× 400 mm²Drop: 0.68V (2.83%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 19.06V (79.42%)
Voltage at Load23.3 VLine Loss: 611.8 W
Max Power & Breaker21.6 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 | 3081.6 V (12840.0%) | 0.0 V | 5083.2 V (21180.0%) | 2773440.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1848.96 V (7704.0%) | 0.0 V | 3049.92 V (12708.0%) | 1664064.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1155.6 V (4815.0%) | 0.0 V | 1906.2 V (7942.5%) | 1040040.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 770.4 V (3210.0%) | 0.0 V | 1270.8 V (5295.0%) | 693360.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 462.24 V (1926.0%) | 0.0 V | 762.48 V (3177.0%) | 416016.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 288.9 V (1203.75%) | 0.0 V | 476.55 V (1985.62%) | 260010.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 184.9 V (770.4%) | 0.0 V | 304.99 V (1270.8%) | 166406.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 132.07 V (550.29%) | 0.0 V | 217.85 V (907.71%) | 118861.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 92.45 V (385.2%) | 0.0 V | 152.5 V (635.4%) | 83203.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 66.03 V (275.14%) | 0.0 V | 108.93 V (453.86%) | 59430.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 48.66 V (202.74%) | 0.0 V | 80.26 V (334.42%) | 43791.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 38.52 V (160.5%) | 0.0 V | 63.54 V (264.75%) | 34668.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 30.82 V (128.4%) | 0.0 V | 50.83 V (211.8%) | 27734.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 24.99 V (104.11%) | 0.0 V | 41.22 V (171.73%) | 22487.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 19.26 V (80.25%) | 4.7 V | 31.77 V (132.38%) | 17334.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 15.41 V (64.2%) | 8.6 V | 25.42 V (105.9%) | 13867.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 11.56 V (48.15%) | 12.4 V | 19.06 V (79.42%) | 10400.4 W | Drop High |
FAQ — 900 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 900A at 120 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 17× 400 mm² copper cable for 900A over 120m at 24V (voltage drop: 0.68V or 2.83%).
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)900A · 70m (24V)10A · 120m (24V)16A · 120m (24V)20A · 120m (24V)25A · 120m (24V)32A · 120m (24V)40A · 120m (24V)50A · 120m (24V)63A · 120m (24V)80A · 120m (24V)100A · 120m (24V)125A · 120m (24V)160A · 120m (24V)200A · 120m (24V)