325 Amp Cable Size at 100 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 100 m (328.1 ft).
Copper Cable (≤3% Drop)5× 400 mm²Drop: 0.7V (2.9%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.74V (23.9%)
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 100m
| 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 | 927.33 V (3863.89%) | 0.0 V | 1529.67 V (6373.61%) | 301383.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 556.4 V (2318.33%) | 0.0 V | 917.8 V (3824.17%) | 180830.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 347.75 V (1448.96%) | 0.0 V | 573.62 V (2390.1%) | 113018.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 231.83 V (965.97%) | 0.0 V | 382.42 V (1593.4%) | 75345.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 139.1 V (579.58%) | 0.0 V | 229.45 V (956.04%) | 45207.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 86.94 V (362.24%) | 0.0 V | 143.41 V (597.53%) | 28254.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 55.64 V (231.83%) | 0.0 V | 91.78 V (382.42%) | 18083.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 39.74 V (165.6%) | 0.0 V | 65.56 V (273.15%) | 12916.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 27.82 V (115.92%) | 0.0 V | 45.89 V (191.21%) | 9041.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 19.87 V (82.8%) | 4.1 V | 32.78 V (136.58%) | 6458.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 14.64 V (61.01%) | 9.4 V | 24.15 V (100.64%) | 4758.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 11.59 V (48.3%) | 12.4 V | 19.12 V (79.67%) | 3767.3 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.27 V (38.64%) | 14.7 V | 15.3 V (63.74%) | 3013.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.52 V (31.33%) | 16.5 V | 12.4 V (51.68%) | 2443.6 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.8 V (24.15%) | 18.2 V | 9.56 V (39.84%) | 1883.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.64 V (19.32%) | 19.4 V | 7.65 V (31.87%) | 1506.9 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.48 V (14.49%) | 20.5 V | 5.74 V (23.9%) | 1130.2 W | Drop High |
FAQ — 325 Amp Cable Size at 100 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 325A at 100 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 5× 400 mm² copper cable for 325A over 100m 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 · 100m (24V)16A · 100m (24V)20A · 100m (24V)25A · 100m (24V)32A · 100m (24V)40A · 100m (24V)50A · 100m (24V)63A · 100m (24V)80A · 100m (24V)100A · 100m (24V)125A · 100m (24V)160A · 100m (24V)200A · 100m (24V)