How Many Amps Is 424.01 kW at 480V?

At 480V, 424.01 kW pulls approximately 600 amps on AC three-phase (PF 0.85). This is the case typical for commercial HVAC, industrial motors, rooftop units, and three-phase panel loads. Always verify against the equipment nameplate for actual install sizing.

424.01 kW at 480V, AC three-phase (PF 0.85)

600 Amps

424.01 kilowatts at 480V on AC three-phase ≈ 600 amps

AC Single Phase (PF 0.85)1,039.23 A

DC (ideal baseline)883.35 A

Try: 200kW at 480V 150kW at 480V 125kW at 480V 100kW at 480V

Volts

Amps (AC three-phase, PF 0.85)

600

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 424.01 ÷ 480 = 424,006 ÷ 480 = 883.35 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

424,006 ÷ (0.85 × 480) = 424,006 ÷ 408 = 1,039.23 A

AC Three Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (√3 × PF × V_L-L), where V_L-L is the line-to-line voltage

424,006 ÷ (1.732 × 0.85 × 480) = 424,006 ÷ 706.66 = 600 A

Equipment & Circuit Sizing

Breaker Sizing

Breaker ratings are in amps, not watts, so the real install answer depends on the equipment nameplate FLA, whether the load is continuous (NEC 210.19(A) sizes the conductor and OCP at 125% of a continuous load, equivalently 80% of breaker rating), conductor ampacity and temperature rating, ambient and bundling derates, and any motor or HVAC provisions (NEC 430 / 440). At roughly 600A on AC three-phase at 480V, the load sits in the bracket between a 600A standard size (non-continuous) and the next size up that covers a continuous load under 210.19(A). The actual install pick depends on whether the load is continuous and the factors above; a conversion page can't pick a single "right" breaker from the amp draw alone.

Energy Cost

424.01 kW costs $72.08/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 424.01 kW at 480V changes with load power factor, on the same AC three-phase circuit basis the rest of the page uses. DC has no power factor; PF 1.0 represents resistive AC loads.

Load Type	PF	424.01 kW at 480V (AC three-phase)
Resistive (heaters, incandescent)	1	510 A
Fluorescent lamps	0.95	536.84 A
LED lighting	0.9	566.67 A
Synchronous motors	0.9	566.67 A
Typical mixed loads	0.85	600 A
Induction motors (full load)	0.8	637.5 A
Computers (without PFC)	0.65	784.62 A
Induction motors (no load)	0.35	1,457.14 A

AC Conversion Comparison

On DC, 424.01kW at 480V draws 883.35A. AC single-phase at PF 0.85 pulls 1,039.23A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 600A per line since the same 424.01kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	424,006 ÷ 480	883.35 A
AC Single Phase (PF 0.85)	424,006 ÷ (0.85 × 480)	1,039.23 A
AC Three Phase (PF 0.85)	424,006 ÷ (1.732 × 0.85 × 480)	600 A

Other kW Values at 480V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
15 kW	21.23 A	36.76 A
18 kW	25.47 A	44.12 A
20 kW	28.3 A	49.02 A
22 kW	31.13 A	53.92 A
25 kW	35.38 A	61.27 A
30 kW	42.45 A	73.53 A
35 kW	49.53 A	85.78 A
40 kW	56.6 A	98.04 A
50 kW	70.75 A	122.55 A
60 kW	84.9 A	147.06 A
75 kW	106.13 A	183.82 A
100 kW	141.51 A	245.1 A
125 kW	176.88 A	306.37 A
150 kW	212.26 A	367.65 A
200 kW	283.01 A	490.2 A

Same kW, Other Voltages

Each destination page leads with the interpretation most common for that voltage, so the amps shown below use the same basis as the page you'd land on: single-phase for residential voltages, three-phase for commercial/industrial panel voltages, DC for low-voltage.

electrical_services 424.01 kW at 208V = 1,384.62A (3-phase) electrical_services 424.01 kW at 400V = 720A (3-phase) electrical_services 424.01 kW at 460V = 626.09A (3-phase) electrical_services 424.01 kW at 575V = 500.87A (3-phase)

Related Calculations

bolt 424,006W to amps at 480V payments 424,006W running cost cable Wire size for 600A at 480V (3Φ)

Frequently Asked Questions

How many amps is 424.01 kW at 480V?expand_more

424.01 kW at 480V draws about 600 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 883.35A on DC, 1,039.23A on AC single-phase.

Why do industrial systems use kW instead of watts?expand_more

Industrial equipment operates at higher power levels. 424.01 kW is easier to express than 424,006W. The math is identical, just scaled by 1000.

What size breaker would I need for 424.01 kW at 480V?expand_more

This is a sizing question, not a conversion question, and there is no single correct answer from a page like this. Breaker selection depends on the equipment nameplate FLA, whether the load is continuous (NEC 210.19(A) applies the 125% continuous-load rule), the conductor ampacity and temperature rating, any NEC 430/440 motor or HVAC provisions, and local code interpretation. Use the nameplate and a licensed electrician for the real install value; use this page only for the current-draw estimate that feeds into that process.

What is the formula for kW to amps?expand_more

DC: Amps = (kW × 1000) ÷ Volts. AC single-phase: Amps = (kW × 1000) ÷ (Volts × PF). AC three-phase: Amps = (kW × 1000) ÷ (Volts_L-L × √3 × PF).

Is 424.01 kW single-phase or three-phase?expand_more

424.01 kW is typically three-phase in commercial and industrial settings.

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.