125 Amp Cable Size at 350 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 125 A over 350 m (1148.3 ft).
Copper Cable (≤3% Drop)7× 400 mm²Drop: 0.67V (2.79%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 7.72V (32.17%)
Voltage at Load23.3 VLine Loss: 83.6 W
Max Power & Breaker3.0 kW125A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 125A at 350m
| 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 | 1248.33 V (5201.39%) | 0.0 V | 2059.17 V (8579.86%) | 156041.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 749.0 V (3120.83%) | 0.0 V | 1235.5 V (5147.92%) | 93625.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 468.12 V (1950.52%) | 0.0 V | 772.19 V (3217.45%) | 58515.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 312.08 V (1300.35%) | 0.0 V | 514.79 V (2144.97%) | 39010.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 187.25 V (780.21%) | 0.0 V | 308.87 V (1286.98%) | 23406.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 117.03 V (487.63%) | 0.0 V | 193.05 V (804.36%) | 14628.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 74.9 V (312.08%) | 0.0 V | 123.55 V (514.79%) | 9362.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 53.5 V (222.92%) | 0.0 V | 88.25 V (367.71%) | 6687.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 37.45 V (156.04%) | 0.0 V | 61.77 V (257.4%) | 4681.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 26.75 V (111.46%) | 0.0 V | 44.12 V (183.85%) | 3343.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 19.71 V (82.13%) | 4.3 V | 32.51 V (135.47%) | 2463.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 15.6 V (65.02%) | 8.4 V | 25.74 V (107.25%) | 1950.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 12.48 V (52.01%) | 11.5 V | 20.59 V (85.8%) | 1560.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 10.12 V (42.17%) | 13.9 V | 16.7 V (69.57%) | 1265.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 7.8 V (32.51%) | 16.2 V | 12.87 V (53.62%) | 975.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.24 V (26.01%) | 17.8 V | 10.3 V (42.9%) | 780.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 4.68 V (19.51%) | 19.3 V | 7.72 V (32.17%) | 585.2 W | Drop High |
FAQ — 125 Amp Cable Size at 350 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 125A at 350 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 7× 400 mm² copper cable for 125A over 350m at 24V (voltage drop: 0.67V or 2.79%).
What is the power capacity of 125A at 24V?
At unity power factor, 125A at 24V supports 3.0 kW with a standard 125A circuit breaker.
Related Lengths & Currents (24V)
125A · 5m (24V)125A · 10m (24V)125A · 15m (24V)125A · 20m (24V)125A · 25m (24V)125A · 30m (24V)125A · 35m (24V)125A · 40m (24V)125A · 45m (24V)125A · 50m (24V)125A · 60m (24V)125A · 70m (24V)10A · 350m (24V)16A · 350m (24V)20A · 350m (24V)25A · 350m (24V)32A · 350m (24V)40A · 350m (24V)50A · 350m (24V)63A · 350m (24V)80A · 350m (24V)100A · 350m (24V)160A · 350m (24V)200A · 350m (24V)