35 Amp Cable Size at 70 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 70 m (229.7 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 0.7V (2.91%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 0.58V (2.4%)
Voltage at Load23.3 VLine Loss: 24.5 W
Max Power & Breaker0.84 kW35A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 35A at 70m
| 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 | 69.91 V (291.28%) | 0.0 V | 115.31 V (480.47%) | 2446.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 41.94 V (174.77%) | 0.0 V | 69.19 V (288.28%) | 1468.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 26.21 V (109.23%) | 0.0 V | 43.24 V (180.18%) | 917.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 17.48 V (72.82%) | 6.5 V | 28.83 V (120.12%) | 611.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 10.49 V (43.69%) | 13.5 V | 17.3 V (72.07%) | 367.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 6.55 V (27.31%) | 17.4 V | 10.81 V (45.04%) | 229.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 4.19 V (17.48%) | 19.8 V | 6.92 V (28.83%) | 146.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 3.0 V (12.48%) | 21.0 V | 4.94 V (20.59%) | 104.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 2.1 V (8.74%) | 21.9 V | 3.46 V (14.41%) | 73.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 1.5 V (6.24%) | 22.5 V | 2.47 V (10.3%) | 52.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 1.1 V (4.6%) | 22.9 V | 1.82 V (7.59%) | 38.6 W | ~ ≤5% |
| 120 mm² | 269 A | 210 A | 0.87 V (3.64%) | 23.1 V | 1.44 V (6.01%) | 30.6 W | ~ ≤5% |
| 150 mm² | 309 A | 241 A | 0.7 V (2.91%) | 23.3 V | 1.15 V (4.8%) | 24.5 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.57 V (2.36%) | 23.4 V | 0.93 V (3.9%) | 19.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.44 V (1.82%) | 23.6 V | 0.72 V (3.0%) | 15.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.35 V (1.46%) | 23.7 V | 0.58 V (2.4%) | 12.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.26 V (1.09%) | 23.7 V | 0.43 V (1.8%) | 9.2 W | ✓ OK (≤3%) |
FAQ — 35 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 35A at 70 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 35A over 70m at 24V (voltage drop: 0.7V or 2.91%).
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)10A · 70m (24V)16A · 70m (24V)20A · 70m (24V)25A · 70m (24V)32A · 70m (24V)40A · 70m (24V)50A · 70m (24V)63A · 70m (24V)80A · 70m (24V)100A · 70m (24V)125A · 70m (24V)160A · 70m (24V)200A · 70m (24V)