⚡ Cu ρ (75°C): 0.0214 Ω·mm²/m 🔌 NEC / IEC Standards: NFPA 70 & IEC 60364 🇺🇸 US Grid Avg: $0.175/kWh 🇩🇪 DE Grid Avg: €0.345/kWh 🇸🇪 SE Elpris: 1.54 SEK/kWh 🇳🇴 NO Strøm: 1.17 NOK/kWh 🔩 Copper Ref: $9,650/t (2026-10-25)
🏭 Industrial Electrical Conversion · Three-Phase & Single-Phase

25 kW to Amps at 400V Three-Phase AC (IEC Europe)

Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 25 kW on a 400V Three-Phase AC (IEC Europe) circuit.

Line Current (0.85 PF)42.45 AAt 1.0 PF: 36.08 A
Active / Apparent Power25.0 kW29.41 kVA · 15.49 kVAR
Recommended Breaker60 A (NEC)45 A (IEC Nominal)
Recommended Copper Wire8 AWGIEC Metric: 10 mm²

Engineering Breakdown for 25 kW at 400V

Input Rating25 kW (400V Three-Phase AC (IEC Europe))
Amperage at 0.85 Power Factor (Industrial Motor/Transformer)42.45 Amps
Amperage at 1.00 Power Factor (Resistive Load)36.08 Amps
Real Power (kW / Watts)25.0 kW (25,000 W)
Apparent Power (kVA) & Reactive Power (kVAR)29.41 kVA / 15.49 kVAR
Equivalent Mechanical Horsepower (HP)33.53 HP
NEC 125% Continuous Circuit Breaker60 A
Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop)8 AWG (NEC) / 10 mm² (IEC)

Frequently Asked Questions

How many amps is 25 kW at 400V (3-Phase)?

At 400V Three-Phase AC (IEC Europe), 25 kW equals 42.45 Amps at an industrial power factor of 0.85 (or 36.08 Amps at unity power factor 1.0).

What size breaker and wire is needed for 25 kW at 400V?

For 42.45A continuous load, NEC requires a 125% rated breaker of 60A with 8 AWG copper conductors, while IEC standard sizing uses a 45A breaker with 10 mm² copper cable.

Other Power Ratings & Voltages

5 kW at 400V (3P)10 kW at 400V (3P)15 kW at 400V (3P)20 kW at 400V (3P)30 kW at 400V (3P)45 kW at 400V (3P)50 kW at 400V (3P)75 kW at 400V (3P)100 kW at 400V (3P)150 kW at 400V (3P)200 kW at 400V (3P)250 kW at 400V (3P)500 kW at 400V (3P)25 kW at 120V Single-Phase AC25 kW at 208V Single-Phase AC25 kW at 230V Single-Phase AC (IEC)25 kW at 240V Single-Phase AC (NEC)25 kW at 208V Three-Phase AC25 kW at 230V Three-Phase AC25 kW at 415V Three-Phase AC (UK / AU)25 kW at 480V Three-Phase AC (US Industrial)25 kW at 600V Three-Phase AC (Canada / Heavy)25 kW at 24V DC Direct Current25 kW at 48V DC Battery / Telecom Bus