150 Amp Cable Size at 20 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 150 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)50 mm²Drop: 2.22V (0.32%)
Aluminum Cable (≤3% Drop)70 mm²Drop: 2.62V (0.38%)
Voltage at Load687.8 VLine Loss: 577.8 W
Max Power & Breaker179.27 kW150A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 150A at 20m
| 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 | 74.13 V (10.74%) | 615.9 V | 122.28 V (17.72%) | 19260.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 44.48 V (6.45%) | 645.5 V | 73.37 V (10.63%) | 11556.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 7222.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 18.53 V (2.69%) | 671.5 V | 30.57 V (4.43%) | 4815.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 11.12 V (1.61%) | 678.9 V | 18.34 V (2.66%) | 2889.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 6.95 V (1.01%) | 683.1 V | 11.46 V (1.66%) | 1805.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 4.45 V (0.64%) | 685.6 V | 7.34 V (1.06%) | 1155.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 3.18 V (0.46%) | 686.8 V | 5.24 V (0.76%) | 825.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 2.22 V (0.32%) | 687.8 V | 3.67 V (0.53%) | 577.8 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.59 V (0.23%) | 688.4 V | 2.62 V (0.38%) | 412.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.17 V (0.17%) | 688.8 V | 1.93 V (0.28%) | 304.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.93 V (0.13%) | 689.1 V | 1.53 V (0.22%) | 240.8 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.74 V (0.11%) | 689.3 V | 1.22 V (0.18%) | 192.6 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.6 V (0.09%) | 689.4 V | 0.99 V (0.14%) | 156.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.46 V (0.07%) | 689.5 V | 0.76 V (0.11%) | 120.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.37 V (0.05%) | 689.6 V | 0.61 V (0.09%) | 96.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.28 V (0.04%) | 689.7 V | 0.46 V (0.07%) | 72.2 W | ✓ OK (≤3%) |
FAQ — 150 Amp Cable Size at 20 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 150A at 20 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 50 mm² copper cable for 150A over 20m at 690V (voltage drop: 2.22V or 0.32%).
What is the power capacity of 150A at 690V?
At unity power factor, 150A at 690V supports 179.27 kW with a standard 150A circuit breaker.
Related Lengths & Currents (690V)
150A · 5m (690V)150A · 10m (690V)150A · 15m (690V)150A · 25m (690V)150A · 30m (690V)150A · 35m (690V)150A · 40m (690V)150A · 45m (690V)150A · 50m (690V)150A · 60m (690V)150A · 70m (690V)10A · 20m (690V)16A · 20m (690V)20A · 20m (690V)25A · 20m (690V)32A · 20m (690V)40A · 20m (690V)50A · 20m (690V)63A · 20m (690V)80A · 20m (690V)100A · 20m (690V)125A · 20m (690V)160A · 20m (690V)200A · 20m (690V)