30 Amp Cable Size at 15 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 30 A over 15 m (49.2 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 4.17V (0.6%)
Aluminum Cable (≤3% Drop)6 mm²Drop: 4.59V (0.66%)
Voltage at Load685.8 VLine Loss: 216.7 W
Max Power & Breaker35.85 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A at 15m
| 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 | 11.12 V (1.61%) | 678.9 V | 18.34 V (2.66%) | 577.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 6.67 V (0.97%) | 683.3 V | 11.01 V (1.59%) | 346.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 4.17 V (0.6%) | 685.8 V | 6.88 V (1.0%) | 216.7 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 2.78 V (0.4%) | 687.2 V | 4.59 V (0.66%) | 144.4 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 1.67 V (0.24%) | 688.3 V | 2.75 V (0.4%) | 86.7 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 1.04 V (0.15%) | 689.0 V | 1.72 V (0.25%) | 54.2 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.67 V (0.1%) | 689.3 V | 1.1 V (0.16%) | 34.7 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.48 V (0.07%) | 689.5 V | 0.79 V (0.11%) | 24.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.33 V (0.05%) | 689.7 V | 0.55 V (0.08%) | 17.3 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.24 V (0.03%) | 689.8 V | 0.39 V (0.06%) | 12.4 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.18 V (0.03%) | 689.8 V | 0.29 V (0.04%) | 9.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.14 V (0.02%) | 689.9 V | 0.23 V (0.03%) | 7.2 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.11 V (0.02%) | 689.9 V | 0.18 V (0.03%) | 5.8 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.09 V (0.01%) | 689.9 V | 0.15 V (0.02%) | 4.7 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.07 V (0.01%) | 689.9 V | 0.11 V (0.02%) | 3.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.06 V (0.01%) | 689.9 V | 0.09 V (0.01%) | 2.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.04 V (0.01%) | 690.0 V | 0.07 V (0.01%) | 2.2 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 15 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 30A at 15 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4 mm² copper cable for 30A over 15m at 690V (voltage drop: 4.17V or 0.6%).
What is the power capacity of 30A at 690V?
At unity power factor, 30A at 690V supports 35.85 kW with a standard 30A circuit breaker.
Related Lengths & Currents (690V)
30A · 5m (690V)30A · 10m (690V)30A · 20m (690V)30A · 25m (690V)30A · 30m (690V)30A · 35m (690V)30A · 40m (690V)30A · 45m (690V)30A · 50m (690V)30A · 60m (690V)30A · 70m (690V)10A · 15m (690V)16A · 15m (690V)20A · 15m (690V)25A · 15m (690V)32A · 15m (690V)40A · 15m (690V)50A · 15m (690V)63A · 15m (690V)80A · 15m (690V)100A · 15m (690V)125A · 15m (690V)160A · 15m (690V)200A · 15m (690V)