20 kVA to Amps at 400V Three-Phase AC (IEC Europe)
Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 20 kVA on a 400V Three-Phase AC (IEC Europe) circuit.
Line Current (0.85 PF)28.87 AAt 1.0 PF: 28.87 A
Active / Apparent Power17.0 kW20.0 kVA · 10.54 kVAR
Recommended Breaker40 A (NEC)30 A (IEC Nominal)
Recommended Copper Wire10 AWGIEC Metric: 4 mm²
Engineering Breakdown for 20 kVA at 400V
| Input Rating | 20 kVA (400V Three-Phase AC (IEC Europe)) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 28.87 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 28.87 Amps |
| Real Power (kW / Watts) | 17.0 kW (17,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 20.0 kVA / 10.54 kVAR |
| Equivalent Mechanical Horsepower (HP) | 22.8 HP |
| NEC 125% Continuous Circuit Breaker | 40 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 10 AWG (NEC) / 4 mm² (IEC) |
Frequently Asked Questions
How many amps is 20 kVA at 400V (3-Phase)?
At 400V Three-Phase AC (IEC Europe), 20 kVA equals 28.87 Amps at an industrial power factor of 0.85 (or 28.87 Amps at unity power factor 1.0).
What size breaker and wire is needed for 20 kVA at 400V?
For 28.87A continuous load, NEC requires a 125% rated breaker of 40A with 10 AWG copper conductors, while IEC standard sizing uses a 30A breaker with 4 mm² copper cable.
Other Power Ratings & Voltages
5 kVA at 400V (3P)10 kVA at 400V (3P)15 kVA at 400V (3P)25 kVA at 400V (3P)30 kVA at 400V (3P)45 kVA at 400V (3P)50 kVA at 400V (3P)75 kVA at 400V (3P)100 kVA at 400V (3P)150 kVA at 400V (3P)200 kVA at 400V (3P)250 kVA at 400V (3P)500 kVA at 400V (3P)20 kVA at 120V Single-Phase AC20 kVA at 208V Single-Phase AC20 kVA at 230V Single-Phase AC (IEC)20 kVA at 240V Single-Phase AC (NEC)20 kVA at 208V Three-Phase AC20 kVA at 230V Three-Phase AC20 kVA at 415V Three-Phase AC (UK / AU)20 kVA at 480V Three-Phase AC (US Industrial)20 kVA at 600V Three-Phase AC (Canada / Heavy)20 kVA at 24V DC Direct Current20 kVA at 48V DC Battery / Telecom Bus