275 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 275 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 5.44V (0.79%)
Aluminum Cable (≤3% Drop)185 mm²Drop: 7.27V (1.05%)
Voltage at Load684.6 VLine Loss: 2589.4 W
Max Power & Breaker328.66 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 275A at 80m
| 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 | 543.63 V (78.79%) | 146.4 V | 896.74 V (129.96%) | 258940.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 326.18 V (47.27%) | 363.8 V | 538.04 V (77.98%) | 155364.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 203.86 V (29.55%) | 486.1 V | 336.28 V (48.74%) | 97102.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 135.91 V (19.7%) | 554.1 V | 224.19 V (32.49%) | 64735.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 81.54 V (11.82%) | 608.5 V | 134.51 V (19.49%) | 38841.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 50.97 V (7.39%) | 639.0 V | 84.07 V (12.18%) | 24275.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 32.62 V (4.73%) | 657.4 V | 53.8 V (7.8%) | 15536.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 23.3 V (3.38%) | 666.7 V | 38.43 V (5.57%) | 11097.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 16.31 V (2.36%) | 673.7 V | 26.9 V (3.9%) | 7768.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 11.65 V (1.69%) | 678.4 V | 19.22 V (2.78%) | 5548.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 8.58 V (1.24%) | 681.4 V | 14.16 V (2.05%) | 4088.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.8 V (0.98%) | 683.2 V | 11.21 V (1.62%) | 3236.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.44 V (0.79%) | 684.6 V | 8.97 V (1.3%) | 2589.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 4.41 V (0.64%) | 685.6 V | 7.27 V (1.05%) | 2099.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.4 V (0.49%) | 686.6 V | 5.6 V (0.81%) | 1618.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.72 V (0.39%) | 687.3 V | 4.48 V (0.65%) | 1294.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.04 V (0.3%) | 688.0 V | 3.36 V (0.49%) | 971.0 W | ✓ OK (≤3%) |
FAQ — 275 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 275A at 80 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 275A over 80m at 690V (voltage drop: 5.44V or 0.79%).
What is the power capacity of 275A at 690V?
At unity power factor, 275A at 690V supports 328.66 kW with a standard 300A circuit breaker.
Related Lengths & Currents (690V)
275A · 5m (690V)275A · 10m (690V)275A · 15m (690V)275A · 20m (690V)275A · 25m (690V)275A · 30m (690V)275A · 35m (690V)275A · 40m (690V)275A · 45m (690V)275A · 50m (690V)275A · 60m (690V)275A · 70m (690V)10A · 80m (690V)16A · 80m (690V)20A · 80m (690V)25A · 80m (690V)32A · 80m (690V)40A · 80m (690V)50A · 80m (690V)63A · 80m (690V)80A · 80m (690V)100A · 80m (690V)125A · 80m (690V)160A · 80m (690V)200A · 80m (690V)