128 kVA to Amps at 208V Single-Phase AC
Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 128 kVA on a 208V Single-Phase AC circuit.
Line Current (0.85 PF)615.38 AAt 1.0 PF: 615.38 A
Active / Apparent Power108.8 kW128.0 kVA · 67.43 kVAR
Recommended Breaker800 A (NEC)700 A (IEC Nominal)
Recommended Copper Wire2× 1000 kcmil (Parallel)IEC Metric: 2× 400 mm²
Engineering Breakdown for 128 kVA at 208V
| Input Rating | 128 kVA (208V Single-Phase AC) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 615.38 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 615.38 Amps |
| Real Power (kW / Watts) | 108.8 kW (108,800 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 128.0 kVA / 67.43 kVAR |
| Equivalent Mechanical Horsepower (HP) | 145.9 HP |
| NEC 125% Continuous Circuit Breaker | 800 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 2× 1000 kcmil (Parallel) (NEC) / 2× 400 mm² (IEC) |
Frequently Asked Questions
How many amps is 128 kVA at 208V (1-Phase)?
At 208V Single-Phase AC, 128 kVA equals 615.38 Amps at an industrial power factor of 0.85 (or 615.38 Amps at unity power factor 1.0).
What size breaker and wire is needed for 128 kVA at 208V?
For 615.38A continuous load, NEC requires a 125% rated breaker of 800A with 2× 1000 kcmil (Parallel) copper conductors, while IEC standard sizing uses a 700A breaker with 2× 400 mm² copper cable.
Other Power Ratings & Voltages
5 kVA at 208V (1P)10 kVA at 208V (1P)15 kVA at 208V (1P)20 kVA at 208V (1P)25 kVA at 208V (1P)30 kVA at 208V (1P)45 kVA at 208V (1P)50 kVA at 208V (1P)75 kVA at 208V (1P)100 kVA at 208V (1P)150 kVA at 208V (1P)200 kVA at 208V (1P)250 kVA at 208V (1P)500 kVA at 208V (1P)128 kVA at 120V Single-Phase AC128 kVA at 230V Single-Phase AC (IEC)128 kVA at 240V Single-Phase AC (NEC)128 kVA at 208V Three-Phase AC128 kVA at 230V Three-Phase AC128 kVA at 400V Three-Phase AC (IEC Europe)128 kVA at 415V Three-Phase AC (UK / AU)128 kVA at 480V Three-Phase AC (US Industrial)128 kVA at 600V Three-Phase AC (Canada / Heavy)128 kVA at 24V DC Direct Current128 kVA at 48V DC Battery / Telecom Bus