700 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 700 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)13× 400 mm²Drop: 0.69V (2.88%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 14.83V (61.77%)
Voltage at Load23.3 VLine Loss: 484.0 W
Max Power & Breaker16.8 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 700A 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 | 2396.8 V (9986.67%) | 0.0 V | 3953.6 V (16473.33%) | 1677760.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1438.08 V (5992.0%) | 0.0 V | 2372.16 V (9884.0%) | 1006656.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 898.8 V (3745.0%) | 0.0 V | 1482.6 V (6177.5%) | 629160.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 599.2 V (2496.67%) | 0.0 V | 988.4 V (4118.33%) | 419440.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 359.52 V (1498.0%) | 0.0 V | 593.04 V (2471.0%) | 251664.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 224.7 V (936.25%) | 0.0 V | 370.65 V (1544.38%) | 157290.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 143.81 V (599.2%) | 0.0 V | 237.22 V (988.4%) | 100665.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 102.72 V (428.0%) | 0.0 V | 169.44 V (706.0%) | 71904.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 71.9 V (299.6%) | 0.0 V | 118.61 V (494.2%) | 50332.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 51.36 V (214.0%) | 0.0 V | 84.72 V (353.0%) | 35952.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 37.84 V (157.68%) | 0.0 V | 62.43 V (260.11%) | 26490.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 29.96 V (124.83%) | 0.0 V | 49.42 V (205.92%) | 20972.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 23.97 V (99.87%) | 0.0 V | 39.54 V (164.73%) | 16777.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 19.43 V (80.97%) | 4.6 V | 32.06 V (133.57%) | 13603.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 14.98 V (62.42%) | 9.0 V | 24.71 V (102.96%) | 10486.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 11.98 V (49.93%) | 12.0 V | 19.77 V (82.37%) | 8388.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 8.99 V (37.45%) | 15.0 V | 14.83 V (61.77%) | 6291.6 W | Drop High |
FAQ — 700 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 700A at 120 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 13× 400 mm² copper cable for 700A over 120m at 24V (voltage drop: 0.69V or 2.88%).
What is the power capacity of 700A at 24V?
At unity power factor, 700A at 24V supports 16.8 kW with a standard 700A circuit breaker.
Related Lengths & Currents (24V)
700A · 5m (24V)700A · 10m (24V)700A · 15m (24V)700A · 20m (24V)700A · 25m (24V)700A · 30m (24V)700A · 35m (24V)700A · 40m (24V)700A · 45m (24V)700A · 50m (24V)700A · 60m (24V)700A · 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)