15 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 15 kW on a 240V Single-Phase AC (NEC) circuit.
Line Current (0.85 PF)73.53 AAt 1.0 PF: 62.5 A
Active / Apparent Power15.0 kW17.65 kVA · 9.3 kVAR
Recommended Breaker100 A (NEC)80 A (IEC Nominal)
Recommended Copper Wire4 AWGIEC Metric: 16 mm²
Engineering Breakdown for 15 kW at 240V
| Input Rating | 15 kW (240V Single-Phase AC (NEC)) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 73.53 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 62.5 Amps |
| Real Power (kW / Watts) | 15.0 kW (15,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 17.65 kVA / 9.3 kVAR |
| Equivalent Mechanical Horsepower (HP) | 20.12 HP |
| NEC 125% Continuous Circuit Breaker | 100 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 4 AWG (NEC) / 16 mm² (IEC) |
Frequently Asked Questions
How many amps is 15 kW at 240V (1-Phase)?
At 240V Single-Phase AC (NEC), 15 kW equals 73.53 Amps at an industrial power factor of 0.85 (or 62.5 Amps at unity power factor 1.0).
What size breaker and wire is needed for 15 kW at 240V?
For 73.53A continuous load, NEC requires a 125% rated breaker of 100A with 4 AWG copper conductors, while IEC standard sizing uses a 80A breaker with 16 mm² copper cable.
Other Power Ratings & Voltages
5 kW at 240V (1P)10 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)15 kW at 120V Single-Phase AC15 kW at 208V Single-Phase AC15 kW at 230V Single-Phase AC (IEC)15 kW at 208V Three-Phase AC15 kW at 230V Three-Phase AC15 kW at 400V Three-Phase AC (IEC Europe)15 kW at 415V Three-Phase AC (UK / AU)15 kW at 480V Three-Phase AC (US Industrial)15 kW at 600V Three-Phase AC (Canada / Heavy)15 kW at 24V DC Direct Current15 kW at 48V DC Battery / Telecom Bus