700 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 700 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)8× 400 mm²Drop: 0.66V (2.73%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 8.65V (36.04%)
Voltage at Load23.3 VLine Loss: 458.8 W
Max Power & Breaker16.8 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 700A 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 | 1398.13 V (5825.56%) | 0.0 V | 2306.27 V (9609.44%) | 978693.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 838.88 V (3495.33%) | 0.0 V | 1383.76 V (5765.67%) | 587216.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 524.3 V (2184.58%) | 0.0 V | 864.85 V (3603.54%) | 367010.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 349.53 V (1456.39%) | 0.0 V | 576.57 V (2402.36%) | 244673.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 209.72 V (873.83%) | 0.0 V | 345.94 V (1441.42%) | 146804.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 131.07 V (546.15%) | 0.0 V | 216.21 V (900.89%) | 91752.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 83.89 V (349.53%) | 0.0 V | 138.38 V (576.57%) | 58721.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 59.92 V (249.67%) | 0.0 V | 98.84 V (411.83%) | 41944.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 41.94 V (174.77%) | 0.0 V | 69.19 V (288.28%) | 29360.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 29.96 V (124.83%) | 0.0 V | 49.42 V (205.92%) | 20972.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 22.08 V (91.98%) | 1.9 V | 36.41 V (151.73%) | 15453.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 17.48 V (72.82%) | 6.5 V | 28.83 V (120.12%) | 12233.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 13.98 V (58.26%) | 10.0 V | 23.06 V (96.09%) | 9786.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 11.34 V (47.23%) | 12.7 V | 18.7 V (77.91%) | 7935.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 8.74 V (36.41%) | 15.3 V | 14.41 V (60.06%) | 6116.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.99 V (29.13%) | 17.0 V | 11.53 V (48.05%) | 4893.5 W | Drop High |
| 400 mm² | 570 A | 445 A | 5.24 V (21.85%) | 18.8 V | 8.65 V (36.04%) | 3670.1 W | Drop High |
FAQ — 700 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 700A at 70 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 8× 400 mm² copper cable for 700A over 70m at 24V (voltage drop: 0.66V or 2.73%).
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)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)