How Many Amps Is 16.8 kW at 480V?

16.8 kW at 480V draws about 23.77 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.

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

23.77 Amps

16.8 kilowatts at 480V on AC three-phase ≈ 23.77 amps

AC Single Phase (PF 0.85)41.18 A

DC (ideal baseline)35 A

Try: 18kW at 480V 15kW at 480V 20kW at 480V 12kW at 480V

Volts

Amps (AC three-phase, PF 0.85)

23.77

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 16.8 ÷ 480 = 16,800 ÷ 480 = 35 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

16,800 ÷ (0.85 × 480) = 16,800 ÷ 408 = 41.18 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

16,800 ÷ (1.732 × 0.85 × 480) = 16,800 ÷ 706.66 = 23.77 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 23.77A on AC three-phase at 480V, the load sits in the bracket between a 25A standard size (non-continuous) and the next size up that covers a continuous load under 210.19(A) (around 30A). 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

16.8 kW costs $2.86/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 16.8 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	16.8 kW at 480V (AC three-phase)
Resistive (heaters, incandescent)	1	20.21 A
Fluorescent lamps	0.95	21.27 A
LED lighting	0.9	22.45 A
Synchronous motors	0.9	22.45 A
Typical mixed loads	0.85	23.77 A
Induction motors (full load)	0.8	25.26 A
Computers (without PFC)	0.65	31.09 A
Induction motors (no load)	0.35	57.74 A

AC Conversion Comparison

On DC, 16.8kW at 480V draws 35A. AC single-phase at PF 0.85 pulls 41.18A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 23.77A per line since the same 16.8kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	16,800 ÷ 480	35 A
AC Single Phase (PF 0.85)	16,800 ÷ (0.85 × 480)	41.18 A
AC Three Phase (PF 0.85)	16,800 ÷ (1.732 × 0.85 × 480)	23.77 A

Other kW Values at 480V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
3 kW	4.25 A	7.35 A
3.5 kW	4.95 A	8.58 A
4 kW	5.66 A	9.8 A
5 kW	7.08 A	12.25 A
6 kW	8.49 A	14.71 A
7.5 kW	10.61 A	18.38 A
8 kW	11.32 A	19.61 A
10 kW	14.15 A	24.51 A
12 kW	16.98 A	29.41 A
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

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 16.8 kW at 24V = 700A (DC) electrical_services 16.8 kW at 120V = 164.71A (1-phase) electrical_services 16.8 kW at 208V = 54.86A (3-phase) electrical_services 16.8 kW at 220V = 89.84A (1-phase) electrical_services 16.8 kW at 230V = 85.93A (1-phase) electrical_services 16.8 kW at 240V = 82.35A (1-phase) electrical_services 16.8 kW at 400V = 28.53A (3-phase) electrical_services 16.8 kW at 460V = 24.81A (3-phase) electrical_services 16.8 kW at 575V = 19.85A (3-phase)

Related Calculations

bolt 16,800W to amps at 480V payments 16,800W running cost cable Wire size for 23.77A at 480V (3Φ)

Frequently Asked Questions

How many amps is 16.8 kW at 480V?expand_more

16.8 kW at 480V draws about 23.77 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 35A on DC, 41.18A on AC single-phase.

How does three-phase affect the amps for 16.8 kW?expand_more

Three-phase at 480V draws 23.77A per line versus 41.18A single-phase. Less current per conductor means smaller wire and lower I²R losses.

How many amps does a 16.8 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, 16.8 kW works out to about 23.77A 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 16.8 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.

How much does 16.8 kW cost to run?expand_more

16.8 kW costs $2.86 per hour at $0.17/kWh (US residential average, last reviewed April 2026). At 8 hours/day that is $685.44 per month.

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).

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.