30 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 30 A over 30 m (98.4 ft).
Copper Cable (≤3% Drop)70 mm²Drop: 0.55V (2.29%)
Aluminum Cable (≤3% Drop)95 mm²Drop: 0.67V (2.79%)
Voltage at Load23.4 VLine Loss: 16.5 W
Max Power & Breaker0.72 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A 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 | 25.68 V (107.0%) | 0.0 V | 42.36 V (176.5%) | 770.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 15.41 V (64.2%) | 8.6 V | 25.42 V (105.9%) | 462.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 9.63 V (40.13%) | 14.4 V | 15.88 V (66.19%) | 288.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 6.42 V (26.75%) | 17.6 V | 10.59 V (44.12%) | 192.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 3.85 V (16.05%) | 20.1 V | 6.35 V (26.47%) | 115.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 2.41 V (10.03%) | 21.6 V | 3.97 V (16.55%) | 72.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 1.54 V (6.42%) | 22.5 V | 2.54 V (10.59%) | 46.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 1.1 V (4.59%) | 22.9 V | 1.82 V (7.56%) | 33.0 W | ~ ≤5% |
| 50 mm² | 151 A | 118 A | 0.77 V (3.21%) | 23.2 V | 1.27 V (5.29%) | 23.1 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 0.55 V (2.29%) | 23.4 V | 0.91 V (3.78%) | 16.5 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.41 V (1.69%) | 23.6 V | 0.67 V (2.79%) | 12.2 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.32 V (1.34%) | 23.7 V | 0.53 V (2.21%) | 9.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.26 V (1.07%) | 23.7 V | 0.42 V (1.76%) | 7.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.21 V (0.87%) | 23.8 V | 0.34 V (1.43%) | 6.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.16 V (0.67%) | 23.8 V | 0.26 V (1.1%) | 4.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.13 V (0.53%) | 23.9 V | 0.21 V (0.88%) | 3.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.1 V (0.4%) | 23.9 V | 0.16 V (0.66%) | 2.9 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 30 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 30A at 30 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 70 mm² copper cable for 30A over 30m at 24V (voltage drop: 0.55V or 2.29%).
What is the power capacity of 30A at 24V?
At unity power factor, 30A at 24V supports 0.72 kW with a standard 30A circuit breaker.
Related Lengths & Currents (24V)
30A · 5m (24V)30A · 10m (24V)30A · 15m (24V)30A · 20m (24V)30A · 25m (24V)30A · 35m (24V)30A · 40m (24V)30A · 45m (24V)30A · 50m (24V)30A · 60m (24V)30A · 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)