25 Amp Cable Size at 50 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 25 A over 50 m (164.0 ft).
Copper Cable (≤3% Drop)95 mm²Drop: 0.56V (2.35%)
Aluminum Cable (≤3% Drop)150 mm²Drop: 0.59V (2.45%)
Voltage at Load23.4 VLine Loss: 14.1 W
Max Power & Breaker0.6 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A at 50m
| 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 | 35.67 V (148.61%) | 0.0 V | 58.83 V (245.14%) | 891.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 21.4 V (89.17%) | 2.6 V | 35.3 V (147.08%) | 535.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 13.37 V (55.73%) | 10.6 V | 22.06 V (91.93%) | 334.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 8.92 V (37.15%) | 15.1 V | 14.71 V (61.28%) | 222.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 5.35 V (22.29%) | 18.6 V | 8.82 V (36.77%) | 133.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 3.34 V (13.93%) | 20.7 V | 5.52 V (22.98%) | 83.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 2.14 V (8.92%) | 21.9 V | 3.53 V (14.71%) | 53.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 1.53 V (6.37%) | 22.5 V | 2.52 V (10.51%) | 38.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.07 V (4.46%) | 22.9 V | 1.76 V (7.35%) | 26.7 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 0.76 V (3.18%) | 23.2 V | 1.26 V (5.25%) | 19.1 W | ~ ≤5% |
| 95 mm² | 232 A | 181 A | 0.56 V (2.35%) | 23.4 V | 0.93 V (3.87%) | 14.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.45 V (1.86%) | 23.6 V | 0.74 V (3.06%) | 11.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.36 V (1.49%) | 23.6 V | 0.59 V (2.45%) | 8.9 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.29 V (1.2%) | 23.7 V | 0.48 V (1.99%) | 7.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.22 V (0.93%) | 23.8 V | 0.37 V (1.53%) | 5.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.18 V (0.74%) | 23.8 V | 0.29 V (1.23%) | 4.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.13 V (0.56%) | 23.9 V | 0.22 V (0.92%) | 3.3 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 50 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 25A at 50 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 95 mm² copper cable for 25A over 50m at 24V (voltage drop: 0.56V or 2.35%).
What is the power capacity of 25A at 24V?
At unity power factor, 25A at 24V supports 0.6 kW with a standard 25A circuit breaker.
Related Lengths & Currents (24V)
25A · 5m (24V)25A · 10m (24V)25A · 15m (24V)25A · 20m (24V)25A · 25m (24V)25A · 30m (24V)25A · 35m (24V)25A · 40m (24V)25A · 45m (24V)25A · 60m (24V)25A · 70m (24V)10A · 50m (24V)16A · 50m (24V)20A · 50m (24V)32A · 50m (24V)40A · 50m (24V)50A · 50m (24V)63A · 50m (24V)80A · 50m (24V)100A · 50m (24V)125A · 50m (24V)160A · 50m (24V)200A · 50m (24V)