How Many Amps Is 669 kW at 480V?

669 kW at 480V draws about 946.69 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.

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

946.69 Amps

669 kilowatts at 480V on AC three-phase ≈ 946.69 amps

AC Single Phase (PF 0.85)1,639.71 A

DC (ideal baseline)1,393.76 A

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

Volts

Amps (AC three-phase, PF 0.85)

946.69

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 669 ÷ 480 = 669,003 ÷ 480 = 1,393.76 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

669,003 ÷ (0.85 × 480) = 669,003 ÷ 408 = 1,639.71 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

669,003 ÷ (1.732 × 0.85 × 480) = 669,003 ÷ 706.66 = 946.69 A

Equipment & Circuit Sizing

Energy Cost

669 kW costs $113.73/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 669 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	669 kW at 480V (AC three-phase)
Resistive (heaters, incandescent)	1	804.69 A
Fluorescent lamps	0.95	847.04 A
LED lighting	0.9	894.1 A
Synchronous motors	0.9	894.1 A
Typical mixed loads	0.85	946.69 A
Induction motors (full load)	0.8	1,005.86 A
Computers (without PFC)	0.65	1,237.98 A
Induction motors (no load)	0.35	2,299.1 A

AC Conversion Comparison

On DC, 669kW at 480V draws 1,393.76A. AC single-phase at PF 0.85 pulls 1,639.71A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 946.69A per line since the same 669kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	669,003 ÷ 480	1,393.76 A
AC Single Phase (PF 0.85)	669,003 ÷ (0.85 × 480)	1,639.71 A
AC Three Phase (PF 0.85)	669,003 ÷ (1.732 × 0.85 × 480)	946.69 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 669 kW at 400V = 1,136.03A (3-phase) electrical_services 669 kW at 460V = 987.85A (3-phase) electrical_services 669 kW at 575V = 790.28A (3-phase)

Related Calculations

bolt 669,003W to amps at 480V payments 669,003W running cost cable Wire size for 946.69A at 480V (3Φ)

Frequently Asked Questions

How many amps is 669 kW at 480V?expand_more

669 kW at 480V draws about 946.69 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 1,393.76A on DC, 1,639.71A on AC single-phase.

Why do industrial systems use kW instead of watts?expand_more

Industrial equipment operates at higher power levels. 669 kW is easier to express than 669,003W. The math is identical, just scaled by 1000.

How many amps does a 669 kW EV charger draw at 480V?expand_more

480V is commercial/industrial panel voltage, not a typical AC EVSE feed to a vehicle. On three-phase 480V, 669 kW works out to about 946.69A 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 669 kW figure at 480V 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 669 kW in watts?expand_more

669 kW equals 669,003 watts. Multiply kilowatts by 1000.

How does three-phase affect the amps for 669 kW?expand_more

Three-phase at 480V draws 946.69A per line versus 1,639.71A single-phase. Less current per conductor means smaller wire and lower I²R losses.

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.