42 kVA 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 42 kVA on a 240V Single-Phase AC (NEC) circuit.
Line Current (0.85 PF)175.0 AAt 1.0 PF: 175.0 A
Active / Apparent Power35.7 kW42.0 kVA · 22.12 kVAR
Recommended Breaker225 A (NEC)175 A (IEC Nominal)
Recommended Copper Wire2/0 AWGIEC Metric: 70 mm²
Engineering Breakdown for 42 kVA at 240V
| Input Rating | 42 kVA (240V Single-Phase AC (NEC)) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 175.0 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 175.0 Amps |
| Real Power (kW / Watts) | 35.7 kW (35,700 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 42.0 kVA / 22.12 kVAR |
| Equivalent Mechanical Horsepower (HP) | 47.87 HP |
| NEC 125% Continuous Circuit Breaker | 225 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 2/0 AWG (NEC) / 70 mm² (IEC) |
Frequently Asked Questions
How many amps is 42 kVA at 240V (1-Phase)?
At 240V Single-Phase AC (NEC), 42 kVA equals 175.0 Amps at an industrial power factor of 0.85 (or 175.0 Amps at unity power factor 1.0).
What size breaker and wire is needed for 42 kVA at 240V?
For 175.0A continuous load, NEC requires a 125% rated breaker of 225A with 2/0 AWG copper conductors, while IEC standard sizing uses a 175A breaker with 70 mm² copper cable.
Other Power Ratings & Voltages
5 kVA at 240V (1P)10 kVA at 240V (1P)15 kVA at 240V (1P)20 kVA at 240V (1P)25 kVA at 240V (1P)30 kVA at 240V (1P)45 kVA at 240V (1P)50 kVA at 240V (1P)75 kVA at 240V (1P)100 kVA at 240V (1P)150 kVA at 240V (1P)200 kVA at 240V (1P)250 kVA at 240V (1P)500 kVA at 240V (1P)42 kVA at 120V Single-Phase AC42 kVA at 208V Single-Phase AC42 kVA at 230V Single-Phase AC (IEC)42 kVA at 208V Three-Phase AC42 kVA at 230V Three-Phase AC42 kVA at 400V Three-Phase AC (IEC Europe)42 kVA at 415V Three-Phase AC (UK / AU)42 kVA at 480V Three-Phase AC (US Industrial)42 kVA at 600V Three-Phase AC (Canada / Heavy)42 kVA at 24V DC Direct Current42 kVA at 48V DC Battery / Telecom Bus