425 kW to Amps at 240V Single-Phase AC (NEC)
Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 425 kW on a 240V Single-Phase AC (NEC) circuit.
Line Current (0.85 PF)2083.33 AAt 1.0 PF: 1770.83 A
Active / Apparent Power425.0 kW500.0 kVA · 263.39 kVAR
Recommended Breaker2700 A (NEC)2500 A (IEC Nominal)
Recommended Copper Wire4× 1000 kcmil (Parallel)IEC Metric: 4× 400 mm²
Engineering Breakdown for 425 kW at 240V
| Input Rating | 425 kW (240V Single-Phase AC (NEC)) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 2083.33 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 1770.83 Amps |
| Real Power (kW / Watts) | 425.0 kW (425,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 500.0 kVA / 263.39 kVAR |
| Equivalent Mechanical Horsepower (HP) | 569.93 HP |
| NEC 125% Continuous Circuit Breaker | 2700 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 4× 1000 kcmil (Parallel) (NEC) / 4× 400 mm² (IEC) |
Frequently Asked Questions
How many amps is 425 kW at 240V (1-Phase)?
At 240V Single-Phase AC (NEC), 425 kW equals 2083.33 Amps at an industrial power factor of 0.85 (or 1770.83 Amps at unity power factor 1.0).
What size breaker and wire is needed for 425 kW at 240V?
For 2083.33A continuous load, NEC requires a 125% rated breaker of 2700A with 4× 1000 kcmil (Parallel) copper conductors, while IEC standard sizing uses a 2500A breaker with 4× 400 mm² copper cable.
Other Power Ratings & Voltages
5 kW at 240V (1P)10 kW at 240V (1P)15 kW at 240V (1P)20 kW at 240V (1P)25 kW at 240V (1P)30 kW at 240V (1P)45 kW at 240V (1P)50 kW at 240V (1P)75 kW at 240V (1P)100 kW at 240V (1P)150 kW at 240V (1P)200 kW at 240V (1P)250 kW at 240V (1P)500 kW at 240V (1P)425 kW at 120V Single-Phase AC425 kW at 208V Single-Phase AC425 kW at 230V Single-Phase AC (IEC)425 kW at 208V Three-Phase AC425 kW at 230V Three-Phase AC425 kW at 400V Three-Phase AC (IEC Europe)425 kW at 415V Three-Phase AC (UK / AU)425 kW at 480V Three-Phase AC (US Industrial)425 kW at 600V Three-Phase AC (Canada / Heavy)425 kW at 24V DC Direct Current425 kW at 48V DC Battery / Telecom Bus