How Many Amps Is 620 kW at 460V?

620 kW at 460V draws about 915.49 amps on an AC three-phase circuit at PF 0.85, typical for commercial HVAC, industrial motors, rooftop units, and three-phase panel loads. Actual current varies with equipment power factor and duty cycle.

620 kW at 460V, AC three-phase (PF 0.85)

915.49 Amps

620 kilowatts at 460V on AC three-phase ≈ 915.49 amps

AC Single Phase (PF 0.85)1,585.68 A

DC (ideal baseline)1,347.83 A

Try: 200kW at 460V 150kW at 460V 125kW at 460V 100kW at 460V

Volts

Amps (AC three-phase, PF 0.85)

915.49

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 620 ÷ 460 = 620,000 ÷ 460 = 1,347.83 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

620,000 ÷ (0.85 × 460) = 620,000 ÷ 391 = 1,585.68 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

620,000 ÷ (1.732 × 0.85 × 460) = 620,000 ÷ 677.21 = 915.49 A

Equipment & Circuit Sizing

Energy Cost

620 kW costs $105.40/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 620 kW at 460V 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	620 kW at 460V (AC three-phase)
Resistive (heaters, incandescent)	1	778.17 A
Fluorescent lamps	0.95	819.12 A
LED lighting	0.9	864.63 A
Synchronous motors	0.9	864.63 A
Typical mixed loads	0.85	915.49 A
Induction motors (full load)	0.8	972.71 A
Computers (without PFC)	0.65	1,197.18 A
Induction motors (no load)	0.35	2,223.34 A

AC Conversion Comparison

On DC, 620kW at 460V draws 1,347.83A. AC single-phase at PF 0.85 pulls 1,585.68A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 915.49A per line since the same 620kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	620,000 ÷ 460	1,347.83 A
AC Single Phase (PF 0.85)	620,000 ÷ (0.85 × 460)	1,585.68 A
AC Three Phase (PF 0.85)	620,000 ÷ (1.732 × 0.85 × 460)	915.49 A

Other kW Values at 460V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
15 kW	22.15 A	38.36 A
18 kW	26.58 A	46.04 A
20 kW	29.53 A	51.15 A
22 kW	32.49 A	56.27 A
25 kW	36.91 A	63.94 A
30 kW	44.3 A	76.73 A
35 kW	51.68 A	89.51 A
40 kW	59.06 A	102.3 A
50 kW	73.83 A	127.88 A
60 kW	88.6 A	153.45 A
75 kW	110.74 A	191.82 A
100 kW	147.66 A	255.75 A
125 kW	184.57 A	319.69 A
150 kW	221.49 A	383.63 A
200 kW	295.32 A	511.51 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 620 kW at 400V = 1,052.82A (3-phase) electrical_services 620 kW at 480V = 877.35A (3-phase) electrical_services 620 kW at 575V = 732.39A (3-phase)

Related Calculations

bolt 620,000W to amps at 460V payments 620,000W running cost cable Wire size for 915.49A at 460V (3Φ)

Frequently Asked Questions

How many amps is 620 kW at 460V?expand_more

620 kW at 460V draws about 915.49 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 1,347.83A on DC, 1,585.68A on AC single-phase.

How does three-phase affect the amps for 620 kW?expand_more

Three-phase at 460V draws 915.49A per line versus 1,585.68A single-phase. Less current per conductor means smaller wire and lower I²R losses.

How many amps does a 620 kW EV charger draw at 460V?expand_more

460V is commercial/industrial panel voltage, not a typical AC EVSE feed to a vehicle. On three-phase 460V, 620 kW works out to about 915.49A per line (three-phase at PF 0.85). In practice, 400-480V three-phase is usually the AC input to a DC fast charger (50-350 kW CCS/NACS stations like Tesla Superchargers), which rectifies to DC and delivers that directly to the vehicle, rather than an AC EVSE connector. A 620 kW figure at 460V is most likely the AC feed to a smaller commercial cabinet or the control-side input of a larger DC fast charger, not an at-the-car AC current.

What is 620 kW in watts?expand_more

620 kW equals 620,000 watts. Multiply kilowatts by 1000.

What size breaker would I need for 620 kW at 460V?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.

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.