425 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 425 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)19× 400 mm²Drop: 0.72V (2.99%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 22.5V (93.77%)
Voltage at Load23.3 VLine Loss: 305.2 W
Max Power & Breaker10.2 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A 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 | 3638.0 V (15158.33%) | 0.0 V | 6001.0 V (25004.17%) | 1546150.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2182.8 V (9095.0%) | 0.0 V | 3600.6 V (15002.5%) | 927690.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1364.25 V (5684.38%) | 0.0 V | 2250.38 V (9376.56%) | 579806.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 909.5 V (3789.58%) | 0.0 V | 1500.25 V (6251.04%) | 386537.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 545.7 V (2273.75%) | 0.0 V | 900.15 V (3750.62%) | 231922.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 341.06 V (1421.09%) | 0.0 V | 562.59 V (2344.14%) | 144951.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 218.28 V (909.5%) | 0.0 V | 360.06 V (1500.25%) | 92769.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 155.91 V (649.64%) | 0.0 V | 257.19 V (1071.61%) | 66263.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 109.14 V (454.75%) | 0.0 V | 180.03 V (750.12%) | 46384.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 77.96 V (324.82%) | 0.0 V | 128.59 V (535.8%) | 33131.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 57.44 V (239.34%) | 0.0 V | 94.75 V (394.8%) | 24412.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 45.48 V (189.48%) | 0.0 V | 75.01 V (312.55%) | 19326.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 36.38 V (151.58%) | 0.0 V | 60.01 V (250.04%) | 15461.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 29.5 V (122.91%) | 0.0 V | 48.66 V (202.74%) | 12536.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 22.74 V (94.74%) | 1.3 V | 37.51 V (156.28%) | 9663.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 18.19 V (75.79%) | 5.8 V | 30.0 V (125.02%) | 7730.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 13.64 V (56.84%) | 10.4 V | 22.5 V (93.77%) | 5798.1 W | Drop High |
FAQ — 425 Amp Cable Size at 300 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 425A at 300 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 19× 400 mm² copper cable for 425A over 300m at 24V (voltage drop: 0.72V or 2.99%).
What is the power capacity of 425A at 24V?
At unity power factor, 425A at 24V supports 10.2 kW with a standard 450A circuit breaker.
Related Lengths & Currents (24V)
425A · 5m (24V)425A · 10m (24V)425A · 15m (24V)425A · 20m (24V)425A · 25m (24V)425A · 30m (24V)425A · 35m (24V)425A · 40m (24V)425A · 45m (24V)425A · 50m (24V)425A · 60m (24V)425A · 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)