250 Amp Cable Size at 30 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 250 A over 30 m (98.4 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 0.4V (1.67%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.32V (5.52%)
Voltage at Load23.6 VLine Loss: 100.3 W
Max Power & Breaker6.0 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A at 30m
| 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 | 214.0 V (891.67%) | 0.0 V | 353.0 V (1470.83%) | 53500.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 128.4 V (535.0%) | 0.0 V | 211.8 V (882.5%) | 32100.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 80.25 V (334.38%) | 0.0 V | 132.38 V (551.56%) | 20062.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 53.5 V (222.92%) | 0.0 V | 88.25 V (367.71%) | 13375.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 32.1 V (133.75%) | 0.0 V | 52.95 V (220.62%) | 8025.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 20.06 V (83.59%) | 3.9 V | 33.09 V (137.89%) | 5015.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 12.84 V (53.5%) | 11.2 V | 21.18 V (88.25%) | 3210.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 9.17 V (38.21%) | 14.8 V | 15.13 V (63.04%) | 2292.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 6.42 V (26.75%) | 17.6 V | 10.59 V (44.12%) | 1605.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 4.59 V (19.11%) | 19.4 V | 7.56 V (31.52%) | 1146.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 3.38 V (14.08%) | 20.6 V | 5.57 V (23.22%) | 844.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.67 V (11.15%) | 21.3 V | 4.41 V (18.39%) | 668.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.14 V (8.92%) | 21.9 V | 3.53 V (14.71%) | 535.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.74 V (7.23%) | 22.3 V | 2.86 V (11.93%) | 433.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.34 V (5.57%) | 22.7 V | 2.21 V (9.19%) | 334.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.07 V (4.46%) | 22.9 V | 1.76 V (7.35%) | 267.5 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 0.8 V (3.34%) | 23.2 V | 1.32 V (5.52%) | 200.6 W | ~ ≤5% |
FAQ — 250 Amp Cable Size at 30 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 250A at 30 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 250A over 30m at 24V (voltage drop: 0.4V or 1.67%).
What is the power capacity of 250A at 24V?
At unity power factor, 250A at 24V supports 6.0 kW with a standard 250A circuit breaker.
Related Lengths & Currents (24V)
250A · 5m (24V)250A · 10m (24V)250A · 15m (24V)250A · 20m (24V)250A · 25m (24V)250A · 35m (24V)250A · 40m (24V)250A · 45m (24V)250A · 50m (24V)250A · 60m (24V)250A · 70m (24V)10A · 30m (24V)16A · 30m (24V)20A · 30m (24V)25A · 30m (24V)32A · 30m (24V)40A · 30m (24V)50A · 30m (24V)63A · 30m (24V)80A · 30m (24V)100A · 30m (24V)125A · 30m (24V)160A · 30m (24V)200A · 30m (24V)