90 Amp Cable Size at 80 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 90 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 0.39V (1.6%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.27V (5.29%)
Voltage at Load23.6 VLine Loss: 34.6 W
Max Power & Breaker2.16 kW90A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 90A at 80m
| 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 | 205.44 V (856.0%) | 0.0 V | 338.88 V (1412.0%) | 18489.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 123.26 V (513.6%) | 0.0 V | 203.33 V (847.2%) | 11093.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 77.04 V (321.0%) | 0.0 V | 127.08 V (529.5%) | 6933.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 51.36 V (214.0%) | 0.0 V | 84.72 V (353.0%) | 4622.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 30.82 V (128.4%) | 0.0 V | 50.83 V (211.8%) | 2773.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 19.26 V (80.25%) | 4.7 V | 31.77 V (132.38%) | 1733.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 12.33 V (51.36%) | 11.7 V | 20.33 V (84.72%) | 1109.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 8.8 V (36.69%) | 15.2 V | 14.52 V (60.51%) | 792.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 6.16 V (25.68%) | 17.8 V | 10.17 V (42.36%) | 554.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 4.4 V (18.34%) | 19.6 V | 7.26 V (30.26%) | 396.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 3.24 V (13.52%) | 20.8 V | 5.35 V (22.29%) | 291.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.57 V (10.7%) | 21.4 V | 4.24 V (17.65%) | 231.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.05 V (8.56%) | 21.9 V | 3.39 V (14.12%) | 184.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.67 V (6.94%) | 22.3 V | 2.75 V (11.45%) | 149.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.28 V (5.35%) | 22.7 V | 2.12 V (8.82%) | 115.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.03 V (4.28%) | 23.0 V | 1.69 V (7.06%) | 92.4 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 0.77 V (3.21%) | 23.2 V | 1.27 V (5.29%) | 69.3 W | ~ ≤5% |
FAQ — 90 Amp Cable Size at 80 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 90A at 80 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 90A over 80m at 24V (voltage drop: 0.39V or 1.6%).
What is the power capacity of 90A at 24V?
At unity power factor, 90A at 24V supports 2.16 kW with a standard 90A circuit breaker.
Related Lengths & Currents (24V)
90A · 5m (24V)90A · 10m (24V)90A · 15m (24V)90A · 20m (24V)90A · 25m (24V)90A · 30m (24V)90A · 35m (24V)90A · 40m (24V)90A · 45m (24V)90A · 50m (24V)90A · 60m (24V)90A · 70m (24V)10A · 80m (24V)16A · 80m (24V)20A · 80m (24V)25A · 80m (24V)32A · 80m (24V)40A · 80m (24V)50A · 80m (24V)63A · 80m (24V)80A · 80m (24V)100A · 80m (24V)125A · 80m (24V)160A · 80m (24V)200A · 80m (24V)