325 Amp Cable Size at 15 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 15 m (49.2 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 0.7V (2.9%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.86V (3.59%)
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 15m
| 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 | 139.1 V (579.58%) | 0.0 V | 229.45 V (956.04%) | 45207.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 83.46 V (347.75%) | 0.0 V | 137.67 V (573.62%) | 27124.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 52.16 V (217.34%) | 0.0 V | 86.04 V (358.52%) | 16952.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 34.77 V (144.9%) | 0.0 V | 57.36 V (239.01%) | 11301.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 20.87 V (86.94%) | 3.1 V | 34.42 V (143.41%) | 6781.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 13.04 V (54.34%) | 11.0 V | 21.51 V (89.63%) | 4238.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 8.35 V (34.77%) | 15.7 V | 13.77 V (57.36%) | 2712.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 5.96 V (24.84%) | 18.0 V | 9.83 V (40.97%) | 1937.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 4.17 V (17.39%) | 19.8 V | 6.88 V (28.68%) | 1356.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 2.98 V (12.42%) | 21.0 V | 4.92 V (20.49%) | 968.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 2.2 V (9.15%) | 21.8 V | 3.62 V (15.1%) | 713.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 1.74 V (7.24%) | 22.3 V | 2.87 V (11.95%) | 565.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.39 V (5.8%) | 22.6 V | 2.29 V (9.56%) | 452.1 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.13 V (4.7%) | 22.9 V | 1.86 V (7.75%) | 366.5 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 0.87 V (3.62%) | 23.1 V | 1.43 V (5.98%) | 282.5 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 0.7 V (2.9%) | 23.3 V | 1.15 V (4.78%) | 226.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.52 V (2.17%) | 23.5 V | 0.86 V (3.59%) | 169.5 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 15 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 325A at 15 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 325A over 15m 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 · 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 · 15m (24V)16A · 15m (24V)20A · 15m (24V)25A · 15m (24V)32A · 15m (24V)40A · 15m (24V)50A · 15m (24V)63A · 15m (24V)80A · 15m (24V)100A · 15m (24V)125A · 15m (24V)160A · 15m (24V)200A · 15m (24V)