500 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 500 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)19× 400 mm²Drop: 0.7V (2.93%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 22.06V (91.93%)
Voltage at Load23.3 VLine Loss: 352.0 W
Max Power & Breaker12.0 kW500A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 500A at 250m
| 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 | 3566.67 V (14861.11%) | 0.0 V | 5883.33 V (24513.89%) | 1783333.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2140.0 V (8916.67%) | 0.0 V | 3530.0 V (14708.33%) | 1070000.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1337.5 V (5572.92%) | 0.0 V | 2206.25 V (9192.71%) | 668750.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 891.67 V (3715.28%) | 0.0 V | 1470.83 V (6128.47%) | 445833.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 535.0 V (2229.17%) | 0.0 V | 882.5 V (3677.08%) | 267500.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 334.38 V (1393.23%) | 0.0 V | 551.56 V (2298.18%) | 167187.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 214.0 V (891.67%) | 0.0 V | 353.0 V (1470.83%) | 107000.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 152.86 V (636.9%) | 0.0 V | 252.14 V (1050.6%) | 76428.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 107.0 V (445.83%) | 0.0 V | 176.5 V (735.42%) | 53500.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 76.43 V (318.45%) | 0.0 V | 126.07 V (525.3%) | 38214.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 56.32 V (234.65%) | 0.0 V | 92.89 V (387.06%) | 28157.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 44.58 V (185.76%) | 0.0 V | 73.54 V (306.42%) | 22291.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 35.67 V (148.61%) | 0.0 V | 58.83 V (245.14%) | 17833.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 28.92 V (120.5%) | 0.0 V | 47.7 V (198.76%) | 14459.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 22.29 V (92.88%) | 1.7 V | 36.77 V (153.21%) | 11145.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 17.83 V (74.31%) | 6.2 V | 29.42 V (122.57%) | 8916.7 W | Drop High |
| 400 mm² | 570 A | 445 A | 13.38 V (55.73%) | 10.6 V | 22.06 V (91.93%) | 6687.5 W | Drop High |
FAQ — 500 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 500A at 250 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 19× 400 mm² copper cable for 500A over 250m at 24V (voltage drop: 0.7V or 2.93%).
What is the power capacity of 500A at 24V?
At unity power factor, 500A at 24V supports 12.0 kW with a standard 500A circuit breaker.
Related Lengths & Currents (24V)
500A · 5m (24V)500A · 10m (24V)500A · 15m (24V)500A · 20m (24V)500A · 25m (24V)500A · 30m (24V)500A · 35m (24V)500A · 40m (24V)500A · 45m (24V)500A · 50m (24V)500A · 60m (24V)500A · 70m (24V)10A · 250m (24V)16A · 250m (24V)20A · 250m (24V)25A · 250m (24V)32A · 250m (24V)40A · 250m (24V)50A · 250m (24V)63A · 250m (24V)80A · 250m (24V)100A · 250m (24V)125A · 250m (24V)160A · 250m (24V)200A · 250m (24V)