100 Amp Cable Size at 100 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 100 A over 100 m (328.1 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 0.54V (2.23%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.76V (7.35%)
Voltage at Load23.5 VLine Loss: 53.5 W
Max Power & Breaker2.4 kW100A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 100A at 100m
| 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 | 285.33 V (1188.89%) | 0.0 V | 470.67 V (1961.11%) | 28533.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 171.2 V (713.33%) | 0.0 V | 282.4 V (1176.67%) | 17120.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 107.0 V (445.83%) | 0.0 V | 176.5 V (735.42%) | 10700.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 71.33 V (297.22%) | 0.0 V | 117.67 V (490.28%) | 7133.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 42.8 V (178.33%) | 0.0 V | 70.6 V (294.17%) | 4280.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 26.75 V (111.46%) | 0.0 V | 44.12 V (183.85%) | 2675.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 17.12 V (71.33%) | 6.9 V | 28.24 V (117.67%) | 1712.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 12.23 V (50.95%) | 11.8 V | 20.17 V (84.05%) | 1222.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 8.56 V (35.67%) | 15.4 V | 14.12 V (58.83%) | 856.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 6.11 V (25.48%) | 17.9 V | 10.09 V (42.02%) | 611.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.51 V (18.77%) | 19.5 V | 7.43 V (30.96%) | 450.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.57 V (14.86%) | 20.4 V | 5.88 V (24.51%) | 356.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.85 V (11.89%) | 21.1 V | 4.71 V (19.61%) | 285.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.31 V (9.64%) | 21.7 V | 3.82 V (15.9%) | 231.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.78 V (7.43%) | 22.2 V | 2.94 V (12.26%) | 178.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.43 V (5.94%) | 22.6 V | 2.35 V (9.81%) | 142.7 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.07 V (4.46%) | 22.9 V | 1.76 V (7.35%) | 107.0 W | ~ ≤5% |
FAQ — 100 Amp Cable Size at 100 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 100A at 100 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 100A over 100m at 24V (voltage drop: 0.54V or 2.23%).
What is the power capacity of 100A at 24V?
At unity power factor, 100A at 24V supports 2.4 kW with a standard 100A circuit breaker.
Related Lengths & Currents (24V)
100A · 5m (24V)100A · 10m (24V)100A · 15m (24V)100A · 20m (24V)100A · 25m (24V)100A · 30m (24V)100A · 35m (24V)100A · 40m (24V)100A · 45m (24V)100A · 50m (24V)100A · 60m (24V)100A · 70m (24V)10A · 100m (24V)16A · 100m (24V)20A · 100m (24V)25A · 100m (24V)32A · 100m (24V)40A · 100m (24V)50A · 100m (24V)63A · 100m (24V)80A · 100m (24V)125A · 100m (24V)160A · 100m (24V)200A · 100m (24V)