550 kW to Amps at 120V Single-Phase AC
Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 550 kW on a 120V Single-Phase AC circuit.
Line Current (0.85 PF)5392.16 AAt 1.0 PF: 4583.33 A
Active / Apparent Power550.0 kW647.06 kVA · 340.86 kVAR
Recommended Breaker6800 A (NEC)5400 A (IEC Nominal)
Recommended Copper Wire10× 1000 kcmil (Parallel)IEC Metric: 10× 400 mm²
Engineering Breakdown for 550 kW at 120V
| Input Rating | 550 kW (120V Single-Phase AC) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 5392.16 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 4583.33 Amps |
| Real Power (kW / Watts) | 550.0 kW (550,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 647.06 kVA / 340.86 kVAR |
| Equivalent Mechanical Horsepower (HP) | 737.56 HP |
| NEC 125% Continuous Circuit Breaker | 6800 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 10× 1000 kcmil (Parallel) (NEC) / 10× 400 mm² (IEC) |
Frequently Asked Questions
How many amps is 550 kW at 120V (1-Phase)?
At 120V Single-Phase AC, 550 kW equals 5392.16 Amps at an industrial power factor of 0.85 (or 4583.33 Amps at unity power factor 1.0).
What size breaker and wire is needed for 550 kW at 120V?
For 5392.16A continuous load, NEC requires a 125% rated breaker of 6800A with 10× 1000 kcmil (Parallel) copper conductors, while IEC standard sizing uses a 5400A breaker with 10× 400 mm² copper cable.
Other Power Ratings & Voltages
5 kW at 120V (1P)10 kW at 120V (1P)15 kW at 120V (1P)20 kW at 120V (1P)25 kW at 120V (1P)30 kW at 120V (1P)45 kW at 120V (1P)50 kW at 120V (1P)75 kW at 120V (1P)100 kW at 120V (1P)150 kW at 120V (1P)200 kW at 120V (1P)250 kW at 120V (1P)500 kW at 120V (1P)550 kW at 208V Single-Phase AC550 kW at 230V Single-Phase AC (IEC)550 kW at 240V Single-Phase AC (NEC)550 kW at 208V Three-Phase AC550 kW at 230V Three-Phase AC550 kW at 400V Three-Phase AC (IEC Europe)550 kW at 415V Three-Phase AC (UK / AU)550 kW at 480V Three-Phase AC (US Industrial)550 kW at 600V Three-Phase AC (Canada / Heavy)550 kW at 24V DC Direct Current550 kW at 48V DC Battery / Telecom Bus