50 kW to Amps at 208V Three-Phase AC
Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 50 kW on a 208V Three-Phase AC circuit.
Line Current (0.85 PF)163.28 AAt 1.0 PF: 138.79 A
Active / Apparent Power50.0 kW58.82 kVA · 30.99 kVAR
Recommended Breaker225 A (NEC)175 A (IEC Nominal)
Recommended Copper Wire2/0 AWGIEC Metric: 70 mm²
Engineering Breakdown for 50 kW at 208V
| Input Rating | 50 kW (208V Three-Phase AC) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 163.28 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 138.79 Amps |
| Real Power (kW / Watts) | 50.0 kW (50,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 58.82 kVA / 30.99 kVAR |
| Equivalent Mechanical Horsepower (HP) | 67.05 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 50 kW at 208V (3-Phase)?
At 208V Three-Phase AC, 50 kW equals 163.28 Amps at an industrial power factor of 0.85 (or 138.79 Amps at unity power factor 1.0).
What size breaker and wire is needed for 50 kW at 208V?
For 163.28A 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 kW at 208V (3P)10 kW at 208V (3P)15 kW at 208V (3P)20 kW at 208V (3P)25 kW at 208V (3P)30 kW at 208V (3P)45 kW at 208V (3P)75 kW at 208V (3P)100 kW at 208V (3P)150 kW at 208V (3P)200 kW at 208V (3P)250 kW at 208V (3P)500 kW at 208V (3P)50 kW at 120V Single-Phase AC50 kW at 208V Single-Phase AC50 kW at 230V Single-Phase AC (IEC)50 kW at 240V Single-Phase AC (NEC)50 kW at 230V Three-Phase AC50 kW at 400V Three-Phase AC (IEC Europe)50 kW at 415V Three-Phase AC (UK / AU)50 kW at 480V Three-Phase AC (US Industrial)50 kW at 600V Three-Phase AC (Canada / Heavy)50 kW at 24V DC Direct Current50 kW at 48V DC Battery / Telecom Bus