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🏭 Industrial Electrical Conversion · Three-Phase & Single-Phase

42 kVA 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 42 kVA on a 208V Three-Phase AC circuit.

Line Current (0.85 PF)116.58 AAt 1.0 PF: 116.58 A
Active / Apparent Power35.7 kW42.0 kVA · 22.12 kVAR
Recommended Breaker150 A (NEC)125 A (IEC Nominal)
Recommended Copper Wire1 AWGIEC Metric: 35 mm²

Engineering Breakdown for 42 kVA at 208V

Input Rating42 kVA (208V Three-Phase AC)
Amperage at 0.85 Power Factor (Industrial Motor/Transformer)116.58 Amps
Amperage at 1.00 Power Factor (Resistive Load)116.58 Amps
Real Power (kW / Watts)35.7 kW (35,700 W)
Apparent Power (kVA) & Reactive Power (kVAR)42.0 kVA / 22.12 kVAR
Equivalent Mechanical Horsepower (HP)47.87 HP
NEC 125% Continuous Circuit Breaker150 A
Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop)1 AWG (NEC) / 35 mm² (IEC)

Frequently Asked Questions

How many amps is 42 kVA at 208V (3-Phase)?

At 208V Three-Phase AC, 42 kVA equals 116.58 Amps at an industrial power factor of 0.85 (or 116.58 Amps at unity power factor 1.0).

What size breaker and wire is needed for 42 kVA at 208V?

For 116.58A continuous load, NEC requires a 125% rated breaker of 150A with 1 AWG copper conductors, while IEC standard sizing uses a 125A breaker with 35 mm² copper cable.

Other Power Ratings & Voltages

5 kVA at 208V (3P)10 kVA at 208V (3P)15 kVA at 208V (3P)20 kVA at 208V (3P)25 kVA at 208V (3P)30 kVA at 208V (3P)45 kVA at 208V (3P)50 kVA at 208V (3P)75 kVA at 208V (3P)100 kVA at 208V (3P)150 kVA at 208V (3P)200 kVA at 208V (3P)250 kVA at 208V (3P)500 kVA at 208V (3P)42 kVA at 120V Single-Phase AC42 kVA at 208V Single-Phase AC42 kVA at 230V Single-Phase AC (IEC)42 kVA at 240V Single-Phase AC (NEC)42 kVA at 230V Three-Phase AC42 kVA at 400V Three-Phase AC (IEC Europe)42 kVA at 415V Three-Phase AC (UK / AU)42 kVA at 480V Three-Phase AC (US Industrial)42 kVA at 600V Three-Phase AC (Canada / Heavy)42 kVA at 24V DC Direct Current42 kVA at 48V DC Battery / Telecom Bus