How Many Amps Is 17.25 kW at 460V?

17.25 kilowatts at 460V works out to roughly 25.47 amps on AC three-phase at PF 0.85. That is typical for commercial HVAC, industrial motors, rooftop units, and three-phase panel loads. See the DC and alternate-phase numbers below for other circuit types.

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

25.47 Amps

17.25 kilowatts at 460V on AC three-phase ≈ 25.47 amps

AC Single Phase (PF 0.85)44.12 A

DC (ideal baseline)37.5 A

Try: 18kW at 460V 15kW at 460V 20kW at 460V 22kW at 460V

Volts

Amps (AC three-phase, PF 0.85)

25.47

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 17.25 ÷ 460 = 17,252 ÷ 460 = 37.5 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

17,252 ÷ (0.85 × 460) = 17,252 ÷ 391 = 44.12 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

17,252 ÷ (1.732 × 0.85 × 460) = 17,252 ÷ 677.21 = 25.47 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 25.47A on AC three-phase at 460V, the load sits in the bracket between a 30A standard size (non-continuous) and the next size up that covers a continuous load under 210.19(A) (around 35A). 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

17.25 kW costs $2.93/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 17.25 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	17.25 kW at 460V (AC three-phase)
Resistive (heaters, incandescent)	1	21.65 A
Fluorescent lamps	0.95	22.79 A
LED lighting	0.9	24.06 A
Synchronous motors	0.9	24.06 A
Typical mixed loads	0.85	25.47 A
Induction motors (full load)	0.8	27.07 A
Computers (without PFC)	0.65	33.31 A
Induction motors (no load)	0.35	61.87 A

AC Conversion Comparison

On DC, 17.25kW at 460V draws 37.5A. AC single-phase at PF 0.85 pulls 44.12A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 25.47A per line since the same 17.25kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	17,252 ÷ 460	37.5 A
AC Single Phase (PF 0.85)	17,252 ÷ (0.85 × 460)	44.12 A
AC Three Phase (PF 0.85)	17,252 ÷ (1.732 × 0.85 × 460)	25.47 A

Other kW Values at 460V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
3 kW	4.43 A	7.67 A
3.5 kW	5.17 A	8.95 A
4 kW	5.91 A	10.23 A
5 kW	7.38 A	12.79 A
6 kW	8.86 A	15.35 A
7.5 kW	11.07 A	19.18 A
8 kW	11.81 A	20.46 A
10 kW	14.77 A	25.58 A
12 kW	17.72 A	30.69 A
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

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 17.25 kW at 24V = 718.83A (DC) electrical_services 17.25 kW at 120V = 169.14A (1-phase) electrical_services 17.25 kW at 208V = 56.34A (3-phase) electrical_services 17.25 kW at 220V = 92.26A (1-phase) electrical_services 17.25 kW at 230V = 88.25A (1-phase) electrical_services 17.25 kW at 240V = 84.57A (1-phase) electrical_services 17.25 kW at 400V = 29.3A (3-phase) electrical_services 17.25 kW at 480V = 24.41A (3-phase) electrical_services 17.25 kW at 575V = 20.38A (3-phase)

Related Calculations

bolt 17,252W to amps at 460V payments 17,252W running cost cable Wire size for 25.47A at 460V (3Φ)

Frequently Asked Questions

How many amps is 17.25 kW at 460V?expand_more

17.25 kW at 460V draws about 25.47 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 37.5A on DC, 44.12A on AC single-phase.

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).

What size breaker would I need for 17.25 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.

Why do industrial systems use kW instead of watts?expand_more

Industrial equipment operates at higher power levels. 17.25 kW is easier to express than 17,252W. The math is identical, just scaled by 1000.

Is 17.25 kW single-phase or three-phase?expand_more

17.25 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.