32 Amp Cable Size at 70 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 32 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)6 mm²Drop: 13.84V (2.01%)
Aluminum Cable (≤3% Drop)10 mm²Drop: 13.7V (1.98%)
Voltage at Load676.2 VLine Loss: 767.0 W
Max Power & Breaker38.24 kW32A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 32A 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 | 55.35 V (8.02%) | 634.6 V | 91.3 V (13.23%) | 3067.9 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 33.21 V (4.81%) | 656.8 V | 54.78 V (7.94%) | 1840.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 20.76 V (3.01%) | 669.2 V | 34.24 V (4.96%) | 1150.5 W | ~ ≤5% |
| 6 mm² | 41 A | 32 A | 13.84 V (2.01%) | 676.2 V | 22.83 V (3.31%) | 767.0 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 8.3 V (1.2%) | 681.7 V | 13.7 V (1.98%) | 460.2 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 5.19 V (0.75%) | 684.8 V | 8.56 V (1.24%) | 287.6 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 3.32 V (0.48%) | 686.7 V | 5.48 V (0.79%) | 184.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.37 V (0.34%) | 687.6 V | 3.91 V (0.57%) | 131.5 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.66 V (0.24%) | 688.3 V | 2.74 V (0.4%) | 92.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.19 V (0.17%) | 688.8 V | 1.96 V (0.28%) | 65.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.87 V (0.13%) | 689.1 V | 1.44 V (0.21%) | 48.4 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.69 V (0.1%) | 689.3 V | 1.14 V (0.17%) | 38.3 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.55 V (0.08%) | 689.4 V | 0.91 V (0.13%) | 30.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.45 V (0.07%) | 689.6 V | 0.74 V (0.11%) | 24.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.35 V (0.05%) | 689.7 V | 0.57 V (0.08%) | 19.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.28 V (0.04%) | 689.7 V | 0.46 V (0.07%) | 15.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.21 V (0.03%) | 689.8 V | 0.34 V (0.05%) | 11.5 W | ✓ OK (≤3%) |
FAQ — 32 Amp Cable Size at 70 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 32A at 70 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 6 mm² copper cable for 32A over 70m at 690V (voltage drop: 13.84V or 2.01%).
What is the power capacity of 32A at 690V?
At unity power factor, 32A at 690V supports 38.24 kW with a standard 32A circuit breaker.
Related Lengths & Currents (690V)
32A · 5m (690V)32A · 10m (690V)32A · 15m (690V)32A · 20m (690V)32A · 25m (690V)32A · 30m (690V)32A · 35m (690V)32A · 40m (690V)32A · 45m (690V)32A · 50m (690V)32A · 60m (690V)10A · 70m (690V)16A · 70m (690V)20A · 70m (690V)25A · 70m (690V)40A · 70m (690V)50A · 70m (690V)63A · 70m (690V)80A · 70m (690V)100A · 70m (690V)125A · 70m (690V)160A · 70m (690V)200A · 70m (690V)