250 Amp Cable Size at 100 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 250 A over 100 m (328.1 ft).
Copper Cable (≤3% Drop)120 mm²Drop: 7.72V (1.12%)
Aluminum Cable (≤3% Drop)185 mm²Drop: 8.26V (1.2%)
Voltage at Load682.3 VLine Loss: 3343.7 W
Max Power & Breaker298.78 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A 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 | 617.76 V (89.53%) | 72.2 V | 1019.02 V (147.68%) | 267500.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 370.66 V (53.72%) | 319.3 V | 611.41 V (88.61%) | 160500.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 231.66 V (33.57%) | 458.3 V | 382.13 V (55.38%) | 100312.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 154.44 V (22.38%) | 535.6 V | 254.76 V (36.92%) | 66875.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 92.66 V (13.43%) | 597.3 V | 152.85 V (22.15%) | 40125.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 57.92 V (8.39%) | 632.1 V | 95.53 V (13.85%) | 25078.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 37.07 V (5.37%) | 652.9 V | 61.14 V (8.86%) | 16050.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 26.48 V (3.84%) | 663.5 V | 43.67 V (6.33%) | 11464.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 18.53 V (2.69%) | 671.5 V | 30.57 V (4.43%) | 8025.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 13.24 V (1.92%) | 676.8 V | 21.84 V (3.16%) | 5732.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 9.75 V (1.41%) | 680.2 V | 16.09 V (2.33%) | 4223.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 7.72 V (1.12%) | 682.3 V | 12.74 V (1.85%) | 3343.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 6.18 V (0.9%) | 683.8 V | 10.19 V (1.48%) | 2675.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 5.01 V (0.73%) | 685.0 V | 8.26 V (1.2%) | 2168.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.86 V (0.56%) | 686.1 V | 6.37 V (0.92%) | 1671.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 3.09 V (0.45%) | 686.9 V | 5.1 V (0.74%) | 1337.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.32 V (0.34%) | 687.7 V | 3.82 V (0.55%) | 1003.1 W | ✓ OK (≤3%) |
FAQ — 250 Amp Cable Size at 100 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 250A at 100 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 120 mm² copper cable for 250A over 100m at 690V (voltage drop: 7.72V or 1.12%).
What is the power capacity of 250A at 690V?
At unity power factor, 250A at 690V supports 298.78 kW with a standard 250A circuit breaker.
Related Lengths & Currents (690V)
250A · 5m (690V)250A · 10m (690V)250A · 15m (690V)250A · 20m (690V)250A · 25m (690V)250A · 30m (690V)250A · 35m (690V)250A · 40m (690V)250A · 45m (690V)250A · 50m (690V)250A · 60m (690V)250A · 70m (690V)10A · 100m (690V)16A · 100m (690V)20A · 100m (690V)25A · 100m (690V)32A · 100m (690V)40A · 100m (690V)50A · 100m (690V)63A · 100m (690V)80A · 100m (690V)100A · 100m (690V)125A · 100m (690V)160A · 100m (690V)200A · 100m (690V)