35 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 35 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 0.6V (2.5%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.74V (3.09%)
Voltage at Load23.4 VLine Loss: 21.0 W
Max Power & Breaker0.84 kW35A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 35A at 120m
| 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 | 119.84 V (499.33%) | 0.0 V | 197.68 V (823.67%) | 4194.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 71.9 V (299.6%) | 0.0 V | 118.61 V (494.2%) | 2516.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 44.94 V (187.25%) | 0.0 V | 74.13 V (308.87%) | 1572.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 29.96 V (124.83%) | 0.0 V | 49.42 V (205.92%) | 1048.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 17.98 V (74.9%) | 6.0 V | 29.65 V (123.55%) | 629.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 11.23 V (46.81%) | 12.8 V | 18.53 V (77.22%) | 393.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 7.19 V (29.96%) | 16.8 V | 11.86 V (49.42%) | 251.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 5.14 V (21.4%) | 18.9 V | 8.47 V (35.3%) | 179.8 W | Drop High |
| 50 mm² | 151 A | 118 A | 3.6 V (14.98%) | 20.4 V | 5.93 V (24.71%) | 125.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 2.57 V (10.7%) | 21.4 V | 4.24 V (17.65%) | 89.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 1.89 V (7.88%) | 22.1 V | 3.12 V (13.01%) | 66.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 1.5 V (6.24%) | 22.5 V | 2.47 V (10.3%) | 52.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.2 V (4.99%) | 22.8 V | 1.98 V (8.24%) | 41.9 W | ~ ≤5% |
| 185 mm² | 353 A | 275 A | 0.97 V (4.05%) | 23.0 V | 1.6 V (6.68%) | 34.0 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 0.75 V (3.12%) | 23.3 V | 1.24 V (5.15%) | 26.2 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 0.6 V (2.5%) | 23.4 V | 0.99 V (4.12%) | 21.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.45 V (1.87%) | 23.6 V | 0.74 V (3.09%) | 15.7 W | ✓ OK (≤3%) |
FAQ — 35 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 35A at 120 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 35A over 120m at 24V (voltage drop: 0.6V or 2.5%).
What is the power capacity of 35A at 24V?
At unity power factor, 35A at 24V supports 0.84 kW with a standard 35A circuit breaker.
Related Lengths & Currents (24V)
35A · 5m (24V)35A · 10m (24V)35A · 15m (24V)35A · 20m (24V)35A · 25m (24V)35A · 30m (24V)35A · 35m (24V)35A · 40m (24V)35A · 45m (24V)35A · 50m (24V)35A · 60m (24V)35A · 70m (24V)10A · 120m (24V)16A · 120m (24V)20A · 120m (24V)25A · 120m (24V)32A · 120m (24V)40A · 120m (24V)50A · 120m (24V)63A · 120m (24V)80A · 120m (24V)100A · 120m (24V)125A · 120m (24V)160A · 120m (24V)200A · 120m (24V)