450 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 450 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)21× 400 mm²Drop: 0.69V (2.87%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 23.83V (99.28%)
Voltage at Load23.3 VLine Loss: 309.5 W
Max Power & Breaker10.8 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 450A 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 | 3852.0 V (16050.0%) | 0.0 V | 6354.0 V (26475.0%) | 1733400.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2311.2 V (9630.0%) | 0.0 V | 3812.4 V (15885.0%) | 1040040.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1444.5 V (6018.75%) | 0.0 V | 2382.75 V (9928.12%) | 650025.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 963.0 V (4012.5%) | 0.0 V | 1588.5 V (6618.75%) | 433350.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 577.8 V (2407.5%) | 0.0 V | 953.1 V (3971.25%) | 260010.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 361.12 V (1504.69%) | 0.0 V | 595.69 V (2482.03%) | 162506.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 231.12 V (963.0%) | 0.0 V | 381.24 V (1588.5%) | 104004.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 165.09 V (687.86%) | 0.0 V | 272.31 V (1134.64%) | 74288.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 115.56 V (481.5%) | 0.0 V | 190.62 V (794.25%) | 52002.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 82.54 V (343.93%) | 0.0 V | 136.16 V (567.32%) | 37144.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 60.82 V (253.42%) | 0.0 V | 100.33 V (418.03%) | 27369.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 48.15 V (200.62%) | 0.0 V | 79.42 V (330.94%) | 21667.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 38.52 V (160.5%) | 0.0 V | 63.54 V (264.75%) | 17334.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 31.23 V (130.14%) | 0.0 V | 51.52 V (214.66%) | 14054.6 W | Drop High |
| 240 mm² | 415 A | 324 A | 24.07 V (100.31%) | 0.0 V | 39.71 V (165.47%) | 10833.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 19.26 V (80.25%) | 4.7 V | 31.77 V (132.38%) | 8667.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 14.44 V (60.19%) | 9.6 V | 23.83 V (99.28%) | 6500.2 W | Drop High |
FAQ — 450 Amp Cable Size at 300 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 450A at 300 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 21× 400 mm² copper cable for 450A over 300m at 24V (voltage drop: 0.69V or 2.87%).
What is the power capacity of 450A at 24V?
At unity power factor, 450A at 24V supports 10.8 kW with a standard 450A circuit breaker.
Related Lengths & Currents (24V)
450A · 5m (24V)450A · 10m (24V)450A · 15m (24V)450A · 20m (24V)450A · 25m (24V)450A · 30m (24V)450A · 35m (24V)450A · 40m (24V)450A · 45m (24V)450A · 50m (24V)450A · 60m (24V)450A · 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)