45 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 45 A over 30 m (98.4 ft).
Copper Cable (≤3% Drop)95 mm²Drop: 0.61V (2.53%)
Aluminum Cable (≤3% Drop)150 mm²Drop: 0.64V (2.65%)
Voltage at Load23.4 VLine Loss: 27.4 W
Max Power & Breaker1.08 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A 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 | 38.52 V (160.5%) | 0.0 V | 63.54 V (264.75%) | 1733.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 23.11 V (96.3%) | 0.9 V | 38.12 V (158.85%) | 1040.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 14.45 V (60.19%) | 9.6 V | 23.83 V (99.28%) | 650.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 9.63 V (40.12%) | 14.4 V | 15.88 V (66.19%) | 433.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 5.78 V (24.08%) | 18.2 V | 9.53 V (39.71%) | 260.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 3.61 V (15.05%) | 20.4 V | 5.96 V (24.82%) | 162.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 2.31 V (9.63%) | 21.7 V | 3.81 V (15.88%) | 104.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 1.65 V (6.88%) | 22.3 V | 2.72 V (11.35%) | 74.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.16 V (4.81%) | 22.8 V | 1.91 V (7.94%) | 52.0 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 0.83 V (3.44%) | 23.2 V | 1.36 V (5.67%) | 37.1 W | ~ ≤5% |
| 95 mm² | 232 A | 181 A | 0.61 V (2.53%) | 23.4 V | 1.0 V (4.18%) | 27.4 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.48 V (2.01%) | 23.5 V | 0.79 V (3.31%) | 21.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.39 V (1.6%) | 23.6 V | 0.64 V (2.65%) | 17.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.31 V (1.3%) | 23.7 V | 0.52 V (2.15%) | 14.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.24 V (1.0%) | 23.8 V | 0.4 V (1.65%) | 10.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.19 V (0.8%) | 23.8 V | 0.32 V (1.32%) | 8.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.14 V (0.6%) | 23.9 V | 0.24 V (0.99%) | 6.5 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 30 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 45A at 30 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 95 mm² copper cable for 45A over 30m at 24V (voltage drop: 0.61V or 2.53%).
What is the power capacity of 45A at 24V?
At unity power factor, 45A at 24V supports 1.08 kW with a standard 45A circuit breaker.
Related Lengths & Currents (24V)
45A · 5m (24V)45A · 10m (24V)45A · 15m (24V)45A · 20m (24V)45A · 25m (24V)45A · 35m (24V)45A · 40m (24V)45A · 45m (24V)45A · 50m (24V)45A · 60m (24V)45A · 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)