45 Amp Cable Size at 350 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 350 m (1148.3 ft).
Copper Cable (≤3% Drop)3× 400 mm²Drop: 0.56V (2.34%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.78V (11.58%)
Voltage at Load23.4 VLine Loss: 25.3 W
Max Power & Breaker1.08 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 350m
| 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 | 449.4 V (1872.5%) | 0.0 V | 741.3 V (3088.75%) | 20223.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 269.64 V (1123.5%) | 0.0 V | 444.78 V (1853.25%) | 12133.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 168.52 V (702.19%) | 0.0 V | 277.99 V (1158.28%) | 7583.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 112.35 V (468.12%) | 0.0 V | 185.32 V (772.19%) | 5055.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 67.41 V (280.88%) | 0.0 V | 111.19 V (463.31%) | 3033.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 42.13 V (175.55%) | 0.0 V | 69.5 V (289.57%) | 1895.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 26.96 V (112.35%) | 0.0 V | 44.48 V (185.32%) | 1213.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 19.26 V (80.25%) | 4.7 V | 31.77 V (132.38%) | 866.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 13.48 V (56.17%) | 10.5 V | 22.24 V (92.66%) | 606.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 9.63 V (40.12%) | 14.4 V | 15.88 V (66.19%) | 433.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.1 V (29.57%) | 16.9 V | 11.7 V (48.77%) | 319.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 5.62 V (23.41%) | 18.4 V | 9.27 V (38.61%) | 252.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.49 V (18.73%) | 19.5 V | 7.41 V (30.89%) | 202.2 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.64 V (15.18%) | 20.4 V | 6.01 V (25.04%) | 164.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.81 V (11.7%) | 21.2 V | 4.63 V (19.3%) | 126.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.25 V (9.36%) | 21.8 V | 3.71 V (15.44%) | 101.1 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.69 V (7.02%) | 22.3 V | 2.78 V (11.58%) | 75.8 W | Drop High |
FAQ — 45 Amp Cable Size at 350 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 45A at 350 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 3× 400 mm² copper cable for 45A over 350m at 24V (voltage drop: 0.56V or 2.34%).
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 · 45m (24V)45A · 50m (24V)45A · 60m (24V)45A · 70m (24V)10A · 350m (24V)16A · 350m (24V)20A · 350m (24V)25A · 350m (24V)32A · 350m (24V)40A · 350m (24V)50A · 350m (24V)63A · 350m (24V)80A · 350m (24V)100A · 350m (24V)125A · 350m (24V)160A · 350m (24V)200A · 350m (24V)