325 Amp Cable Size at 300 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 325 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)15× 400 mm²Drop: 0.7V (2.9%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 17.21V (71.7%)
Voltage at Load23.3 VLine Loss: 226.0 W
Max Power & Breaker7.8 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 300m
| 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 | 2782.0 V (11591.67%) | 0.0 V | 4589.0 V (19120.83%) | 904150.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1669.2 V (6955.0%) | 0.0 V | 2753.4 V (11472.5%) | 542490.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1043.25 V (4346.88%) | 0.0 V | 1720.88 V (7170.31%) | 339056.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 695.5 V (2897.92%) | 0.0 V | 1147.25 V (4780.21%) | 226037.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 417.3 V (1738.75%) | 0.0 V | 688.35 V (2868.12%) | 135622.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 260.81 V (1086.72%) | 0.0 V | 430.22 V (1792.58%) | 84764.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 166.92 V (695.5%) | 0.0 V | 275.34 V (1147.25%) | 54249.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 119.23 V (496.79%) | 0.0 V | 196.67 V (819.46%) | 38749.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 83.46 V (347.75%) | 0.0 V | 137.67 V (573.62%) | 27124.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 59.61 V (248.39%) | 0.0 V | 98.34 V (409.73%) | 19374.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 43.93 V (183.03%) | 0.0 V | 72.46 V (301.91%) | 14276.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 34.77 V (144.9%) | 0.0 V | 57.36 V (239.01%) | 11301.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 27.82 V (115.92%) | 0.0 V | 45.89 V (191.21%) | 9041.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 22.56 V (93.99%) | 1.4 V | 37.21 V (155.03%) | 7330.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 17.39 V (72.45%) | 6.6 V | 28.68 V (119.51%) | 5650.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 13.91 V (57.96%) | 10.1 V | 22.95 V (95.6%) | 4520.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 10.43 V (43.47%) | 13.6 V | 17.21 V (71.7%) | 3390.6 W | Drop High |
FAQ — 325 Amp Cable Size at 300 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 325A at 300 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 15× 400 mm² copper cable for 325A over 300m at 24V (voltage drop: 0.7V or 2.9%).
What is the power capacity of 325A at 24V?
At unity power factor, 325A at 24V supports 7.8 kW with a standard 350A circuit breaker.
Related Lengths & Currents (24V)
325A · 5m (24V)325A · 10m (24V)325A · 15m (24V)325A · 20m (24V)325A · 25m (24V)325A · 30m (24V)325A · 35m (24V)325A · 40m (24V)325A · 45m (24V)325A · 50m (24V)325A · 60m (24V)325A · 70m (24V)10A · 300m (24V)16A · 300m (24V)20A · 300m (24V)25A · 300m (24V)32A · 300m (24V)40A · 300m (24V)50A · 300m (24V)63A · 300m (24V)80A · 300m (24V)100A · 300m (24V)125A · 300m (24V)160A · 300m (24V)200A · 300m (24V)