700 Amp Cable Size at 250 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 250 m (820.2 ft).
Copper Cable (≤3% Drop)27× 400 mm²Drop: 0.69V (2.89%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 30.89V (128.7%)
Voltage at Load23.3 VLine Loss: 485.5 W
Max Power & Breaker16.8 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 700A at 250m
| 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 | 4993.33 V (20805.56%) | 0.0 V | 8236.67 V (34319.44%) | 3495333.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2996.0 V (12483.33%) | 0.0 V | 4942.0 V (20591.67%) | 2097200.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1872.5 V (7802.08%) | 0.0 V | 3088.75 V (12869.79%) | 1310750.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1248.33 V (5201.39%) | 0.0 V | 2059.17 V (8579.86%) | 873833.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 749.0 V (3120.83%) | 0.0 V | 1235.5 V (5147.92%) | 524300.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 468.12 V (1950.52%) | 0.0 V | 772.19 V (3217.45%) | 327687.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 299.6 V (1248.33%) | 0.0 V | 494.2 V (2059.17%) | 209720.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 214.0 V (891.67%) | 0.0 V | 353.0 V (1470.83%) | 149800.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 149.8 V (624.17%) | 0.0 V | 247.1 V (1029.58%) | 104860.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 107.0 V (445.83%) | 0.0 V | 176.5 V (735.42%) | 74900.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 78.84 V (328.51%) | 0.0 V | 130.05 V (541.89%) | 55189.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 62.42 V (260.07%) | 0.0 V | 102.96 V (428.99%) | 43691.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 49.93 V (208.06%) | 0.0 V | 82.37 V (343.19%) | 34953.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 40.49 V (168.69%) | 0.0 V | 66.78 V (278.27%) | 28340.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 31.21 V (130.03%) | 0.0 V | 51.48 V (214.5%) | 21845.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 24.97 V (104.03%) | 0.0 V | 41.18 V (171.6%) | 17476.7 W | Drop High |
| 400 mm² | 570 A | 445 A | 18.72 V (78.02%) | 5.3 V | 30.89 V (128.7%) | 13107.5 W | Drop High |
FAQ — 700 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 700A at 250 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 27× 400 mm² copper cable for 700A over 250m at 24V (voltage drop: 0.69V or 2.89%).
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 · 250m (24V)16A · 250m (24V)20A · 250m (24V)25A · 250m (24V)32A · 250m (24V)40A · 250m (24V)50A · 250m (24V)63A · 250m (24V)80A · 250m (24V)100A · 250m (24V)125A · 250m (24V)160A · 250m (24V)200A · 250m (24V)