45 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 0.58V (2.41%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 0.6V (2.48%)
Voltage at Load23.4 VLine Loss: 26.0 W
Max Power & Breaker1.08 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 45m
| 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 | 57.78 V (240.75%) | 0.0 V | 95.31 V (397.12%) | 2600.1 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 34.67 V (144.45%) | 0.0 V | 57.19 V (238.28%) | 1560.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 21.67 V (90.28%) | 2.3 V | 35.74 V (148.92%) | 975.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 14.45 V (60.19%) | 9.6 V | 23.83 V (99.28%) | 650.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 8.67 V (36.11%) | 15.3 V | 14.3 V (59.57%) | 390.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 5.42 V (22.57%) | 18.6 V | 8.94 V (37.23%) | 243.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 3.47 V (14.45%) | 20.5 V | 5.72 V (23.83%) | 156.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 2.48 V (10.32%) | 21.5 V | 4.08 V (17.02%) | 111.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.73 V (7.22%) | 22.3 V | 2.86 V (11.91%) | 78.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 1.24 V (5.16%) | 22.8 V | 2.04 V (8.51%) | 55.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 0.91 V (3.8%) | 23.1 V | 1.5 V (6.27%) | 41.1 W | ~ ≤5% |
| 120 mm² | 269 A | 210 A | 0.72 V (3.01%) | 23.3 V | 1.19 V (4.96%) | 32.5 W | ~ ≤5% |
| 150 mm² | 309 A | 241 A | 0.58 V (2.41%) | 23.4 V | 0.95 V (3.97%) | 26.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.47 V (1.95%) | 23.5 V | 0.77 V (3.22%) | 21.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.36 V (1.5%) | 23.6 V | 0.6 V (2.48%) | 16.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.29 V (1.2%) | 23.7 V | 0.48 V (1.99%) | 13.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.22 V (0.9%) | 23.8 V | 0.36 V (1.49%) | 9.8 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 45 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 45A at 45 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 45A over 45m at 24V (voltage drop: 0.58V or 2.41%).
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 · 30m (24V)45A · 35m (24V)45A · 40m (24V)45A · 50m (24V)45A · 60m (24V)45A · 70m (24V)10A · 45m (24V)16A · 45m (24V)20A · 45m (24V)25A · 45m (24V)32A · 45m (24V)40A · 45m (24V)50A · 45m (24V)63A · 45m (24V)80A · 45m (24V)100A · 45m (24V)125A · 45m (24V)160A · 45m (24V)200A · 45m (24V)