16 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 16 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 0.68V (2.85%)
Aluminum Cable (≤3% Drop)50 mm²Drop: 0.56V (2.35%)
Voltage at Load23.3 VLine Loss: 11.0 W
Max Power & Breaker0.38 kW16A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 16A at 25m
| 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 | 11.41 V (47.56%) | 12.6 V | 18.83 V (78.44%) | 182.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 6.85 V (28.53%) | 17.2 V | 11.3 V (47.07%) | 109.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 4.28 V (17.83%) | 19.7 V | 7.06 V (29.42%) | 68.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 2.85 V (11.89%) | 21.1 V | 4.71 V (19.61%) | 45.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 1.71 V (7.13%) | 22.3 V | 2.82 V (11.77%) | 27.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 1.07 V (4.46%) | 22.9 V | 1.76 V (7.35%) | 17.1 W | ~ ≤5% |
| 25 mm² | 101 A | 78 A | 0.68 V (2.85%) | 23.3 V | 1.13 V (4.71%) | 11.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.49 V (2.04%) | 23.5 V | 0.81 V (3.36%) | 7.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.34 V (1.43%) | 23.7 V | 0.56 V (2.35%) | 5.5 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.24 V (1.02%) | 23.8 V | 0.4 V (1.68%) | 3.9 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.18 V (0.75%) | 23.8 V | 0.3 V (1.24%) | 2.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.14 V (0.59%) | 23.9 V | 0.24 V (0.98%) | 2.3 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.11 V (0.48%) | 23.9 V | 0.19 V (0.78%) | 1.8 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.09 V (0.39%) | 23.9 V | 0.15 V (0.64%) | 1.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.07 V (0.3%) | 23.9 V | 0.12 V (0.49%) | 1.1 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.06 V (0.24%) | 23.9 V | 0.09 V (0.39%) | 0.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.04 V (0.18%) | 24.0 V | 0.07 V (0.29%) | 0.7 W | ✓ OK (≤3%) |
FAQ — 16 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 16A at 25 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 16A over 25m at 24V (voltage drop: 0.68V or 2.85%).
What is the power capacity of 16A at 24V?
At unity power factor, 16A at 24V supports 0.38 kW with a standard 16A circuit breaker.
Related Lengths & Currents (24V)
16A · 5m (24V)16A · 10m (24V)16A · 15m (24V)16A · 20m (24V)16A · 30m (24V)16A · 35m (24V)16A · 40m (24V)16A · 45m (24V)16A · 50m (24V)16A · 60m (24V)16A · 70m (24V)10A · 25m (24V)20A · 25m (24V)25A · 25m (24V)32A · 25m (24V)40A · 25m (24V)50A · 25m (24V)63A · 25m (24V)80A · 25m (24V)100A · 25m (24V)125A · 25m (24V)160A · 25m (24V)200A · 25m (24V)