300 kW to Amps at 600V Three-Phase AC (Canada / Heavy)
Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 300 kW on a 600V Three-Phase AC (Canada / Heavy) circuit.
Line Current (0.85 PF)339.62 AAt 1.0 PF: 288.68 A
Active / Apparent Power300.0 kW352.94 kVA · 185.92 kVAR
Recommended Breaker450 A (NEC)350 A (IEC Nominal)
Recommended Copper Wire500 kcmilIEC Metric: 185 mm²
Engineering Breakdown for 300 kW at 600V
| Input Rating | 300 kW (600V Three-Phase AC (Canada / Heavy)) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 339.62 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 288.68 Amps |
| Real Power (kW / Watts) | 300.0 kW (300,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 352.94 kVA / 185.92 kVAR |
| Equivalent Mechanical Horsepower (HP) | 402.31 HP |
| NEC 125% Continuous Circuit Breaker | 450 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 500 kcmil (NEC) / 185 mm² (IEC) |
Frequently Asked Questions
How many amps is 300 kW at 600V (3-Phase)?
At 600V Three-Phase AC (Canada / Heavy), 300 kW equals 339.62 Amps at an industrial power factor of 0.85 (or 288.68 Amps at unity power factor 1.0).
What size breaker and wire is needed for 300 kW at 600V?
For 339.62A continuous load, NEC requires a 125% rated breaker of 450A with 500 kcmil copper conductors, while IEC standard sizing uses a 350A breaker with 185 mm² copper cable.
Other Power Ratings & Voltages
5 kW at 600V (3P)10 kW at 600V (3P)15 kW at 600V (3P)20 kW at 600V (3P)25 kW at 600V (3P)30 kW at 600V (3P)45 kW at 600V (3P)50 kW at 600V (3P)75 kW at 600V (3P)100 kW at 600V (3P)150 kW at 600V (3P)200 kW at 600V (3P)250 kW at 600V (3P)500 kW at 600V (3P)300 kW at 120V Single-Phase AC300 kW at 208V Single-Phase AC300 kW at 230V Single-Phase AC (IEC)300 kW at 240V Single-Phase AC (NEC)300 kW at 208V Three-Phase AC300 kW at 230V Three-Phase AC300 kW at 400V Three-Phase AC (IEC Europe)300 kW at 415V Three-Phase AC (UK / AU)300 kW at 480V Three-Phase AC (US Industrial)300 kW at 24V DC Direct Current300 kW at 48V DC Battery / Telecom Bus