4.2 kW to Amps

4.2 kilowatts is 17.52 amps at 240V (DC). The exact amperage depends on your voltage and whether the circuit is single-phase or three-phase.

4.2 kW to Amps at Every Voltage

VoltageDCAC 1-Phase (PF 0.85)AC 3-Phase (PF 0.85)
12V
DC, automotive, solar
350.33A 412.16A 237.96A
24V
DC, industrial control
175.17A 206.08A 118.98A
100V
Japan residential
42.04A 49.46A 28.56A
120V
US residential
35.03A 41.22A 23.8A
208V
US commercial three-phase
20.21A 23.78A 13.73A
220V
Legacy international / parts of Asia
19.11A 22.48A 12.98A
230V
UK / EU residential
18.28A 21.5A 12.42A
240V
US residential (dryer, range, HVAC)
17.52A 20.61A 11.9A
277V
US commercial lighting
15.18A 17.86A 10.31A
400V
UK / EU commercial three-phase
10.51A 12.36A 7.14A
460V
US industrial motor (NEC 430.250 column)
9.14A 10.75A 6.21A
480V
US industrial three-phase
8.76A 10.3A 5.95A
575V
Canadian industrial three-phase
7.31A 8.6A 4.97A

Other kW Values

This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.