375 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 375 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 4.05V (0.59%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 4.01V (0.58%)
Voltage at Load685.9 VLine Loss: 2633.2 W
Max Power & Breaker448.17 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 375A 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 | 648.65 V (94.01%) | 41.3 V | 1069.97 V (155.07%) | 421312.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 389.19 V (56.4%) | 300.8 V | 641.98 V (93.04%) | 252787.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 243.24 V (35.25%) | 446.8 V | 401.24 V (58.15%) | 157992.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 162.16 V (23.5%) | 527.8 V | 267.49 V (38.77%) | 105328.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 97.3 V (14.1%) | 592.7 V | 160.5 V (23.26%) | 63196.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 60.81 V (8.81%) | 629.2 V | 100.31 V (14.54%) | 39498.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 38.92 V (5.64%) | 651.1 V | 64.2 V (9.3%) | 25278.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 18056.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 19.46 V (2.82%) | 670.5 V | 32.1 V (4.65%) | 12639.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 9028.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 10.24 V (1.48%) | 679.8 V | 16.89 V (2.45%) | 6652.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 8.11 V (1.18%) | 681.9 V | 13.37 V (1.94%) | 5266.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 6.49 V (0.94%) | 683.5 V | 10.7 V (1.55%) | 4213.1 W | Drop High |
| 185 mm² | 353 A | 275 A | 5.26 V (0.76%) | 684.7 V | 8.68 V (1.26%) | 3416.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 4.05 V (0.59%) | 685.9 V | 6.69 V (0.97%) | 2633.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 3.24 V (0.47%) | 686.8 V | 5.35 V (0.78%) | 2106.6 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.43 V (0.35%) | 687.6 V | 4.01 V (0.58%) | 1579.9 W | ✓ OK (≤3%) |
FAQ — 375 Amp Cable Size at 70 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 375A at 70 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 375A over 70m at 690V (voltage drop: 4.05V or 0.59%).
What is the power capacity of 375A at 690V?
At unity power factor, 375A at 690V supports 448.17 kW with a standard 400A circuit breaker.
Related Lengths & Currents (690V)
375A · 5m (690V)375A · 10m (690V)375A · 15m (690V)375A · 20m (690V)375A · 25m (690V)375A · 30m (690V)375A · 35m (690V)375A · 40m (690V)375A · 45m (690V)375A · 50m (690V)375A · 60m (690V)10A · 70m (690V)16A · 70m (690V)20A · 70m (690V)25A · 70m (690V)32A · 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)