30 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 30 A over 90 m (295.3 ft).
Copper Cable (≤3% Drop)6 mm²Drop: 16.68V (2.42%)
Aluminum Cable (≤3% Drop)10 mm²Drop: 16.51V (2.39%)
Voltage at Load673.3 VLine Loss: 866.7 W
Max Power & Breaker35.85 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A at 90m
| 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 | 66.72 V (9.67%) | 623.3 V | 110.05 V (15.95%) | 3466.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 40.03 V (5.8%) | 650.0 V | 66.03 V (9.57%) | 2080.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 25.02 V (3.63%) | 665.0 V | 41.27 V (5.98%) | 1300.0 W | ~ ≤5% |
| 6 mm² | 41 A | 32 A | 16.68 V (2.42%) | 673.3 V | 27.51 V (3.99%) | 866.7 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 10.01 V (1.45%) | 680.0 V | 16.51 V (2.39%) | 520.0 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 6.25 V (0.91%) | 683.7 V | 10.32 V (1.5%) | 325.0 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 4.0 V (0.58%) | 686.0 V | 6.6 V (0.96%) | 208.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.86 V (0.41%) | 687.1 V | 4.72 V (0.68%) | 148.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 2.0 V (0.29%) | 688.0 V | 3.3 V (0.48%) | 104.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.43 V (0.21%) | 688.6 V | 2.36 V (0.34%) | 74.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.05 V (0.15%) | 688.9 V | 1.74 V (0.25%) | 54.7 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.83 V (0.12%) | 689.2 V | 1.38 V (0.2%) | 43.3 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.67 V (0.1%) | 689.3 V | 1.1 V (0.16%) | 34.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.54 V (0.08%) | 689.5 V | 0.89 V (0.13%) | 28.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.42 V (0.06%) | 689.6 V | 0.69 V (0.1%) | 21.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.33 V (0.05%) | 689.7 V | 0.55 V (0.08%) | 17.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.25 V (0.04%) | 689.7 V | 0.41 V (0.06%) | 13.0 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 30A at 90 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 6 mm² copper cable for 30A over 90m at 690V (voltage drop: 16.68V or 2.42%).
What is the power capacity of 30A at 690V?
At unity power factor, 30A at 690V supports 35.85 kW with a standard 30A circuit breaker.
Related Lengths & Currents (690V)
30A · 5m (690V)30A · 10m (690V)30A · 15m (690V)30A · 20m (690V)30A · 25m (690V)30A · 30m (690V)30A · 35m (690V)30A · 40m (690V)30A · 45m (690V)30A · 50m (690V)30A · 60m (690V)30A · 70m (690V)10A · 90m (690V)16A · 90m (690V)20A · 90m (690V)25A · 90m (690V)32A · 90m (690V)40A · 90m (690V)50A · 90m (690V)63A · 90m (690V)80A · 90m (690V)100A · 90m (690V)125A · 90m (690V)160A · 90m (690V)200A · 90m (690V)