800 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 800 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)9× 400 mm²Drop: 0.67V (2.77%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 9.88V (41.18%)
Voltage at Load23.3 VLine Loss: 532.6 W
Max Power & Breaker19.2 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A 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 | 1597.87 V (6657.78%) | 0.0 V | 2635.73 V (10982.22%) | 1278293.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 958.72 V (3994.67%) | 0.0 V | 1581.44 V (6589.33%) | 766976.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 599.2 V (2496.67%) | 0.0 V | 988.4 V (4118.33%) | 479360.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 399.47 V (1664.44%) | 0.0 V | 658.93 V (2745.56%) | 319573.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 239.68 V (998.67%) | 0.0 V | 395.36 V (1647.33%) | 191744.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 149.8 V (624.17%) | 0.0 V | 247.1 V (1029.58%) | 119840.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 95.87 V (399.47%) | 0.0 V | 158.14 V (658.93%) | 76697.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 68.48 V (285.33%) | 0.0 V | 112.96 V (470.67%) | 54784.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 47.94 V (199.73%) | 0.0 V | 79.07 V (329.47%) | 38348.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 34.24 V (142.67%) | 0.0 V | 56.48 V (235.33%) | 27392.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 25.23 V (105.12%) | 0.0 V | 41.62 V (173.4%) | 20183.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 19.97 V (83.22%) | 4.0 V | 32.95 V (137.28%) | 15978.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 15.98 V (66.58%) | 8.0 V | 26.36 V (109.82%) | 12782.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 12.96 V (53.98%) | 11.0 V | 21.37 V (89.05%) | 10364.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 9.99 V (41.61%) | 14.0 V | 16.47 V (68.64%) | 7989.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 7.99 V (33.29%) | 16.0 V | 13.18 V (54.91%) | 6391.5 W | Drop High |
| 400 mm² | 570 A | 445 A | 5.99 V (24.97%) | 18.0 V | 9.88 V (41.18%) | 4793.6 W | Drop High |
FAQ — 800 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 800A at 70 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 9× 400 mm² copper cable for 800A over 70m at 24V (voltage drop: 0.67V or 2.77%).
What is the power capacity of 800A at 24V?
At unity power factor, 800A at 24V supports 19.2 kW with a standard 800A circuit breaker.
Related Lengths & Currents (24V)
800A · 5m (24V)800A · 10m (24V)800A · 15m (24V)800A · 20m (24V)800A · 25m (24V)800A · 30m (24V)800A · 35m (24V)800A · 40m (24V)800A · 45m (24V)800A · 50m (24V)800A · 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)