50 kW to amps

On a 208 V three-phase system, 50 kW draws 138.79 amps; at 480 V it draws 60.14 amps, and on 240 V single phase 208.33 amps at a power factor of 1.

50 kW to amps at common voltages

50 kW in amps by voltage, power factor 1
Voltage	Amps, A	Breaker, continuous load, A
240 V single phase	208.33	300
208 V three phase	138.79	175
240 V three phase	120.28	175
480 V three phase	60.14	80

50 kW in amps by voltage.

How to convert 50 kW to amps

On a three-phase system, amps = kW × 1,000 ÷ (1.732 × volts × power factor): 50 kW × 1,000 ÷ (1.732 × 208 V × 1) = 138.79 A per line. At a power factor of 0.8, the same 50 kW draws 173.48 A. On single phase, amps = kW × 1,000 ÷ (volts × power factor): 50 kW × 1,000 ÷ 240 V = 208.33 A at a power factor of 1.

The breaker column assumes a continuous load, sized at 125% of the current, and rounds up to the next standard breaker. Transformers and generators have their own protection rules; follow the nameplate.

Nearby values

Amps for 5 to 100 kW at 208 V three phase and 480 V three phase
kW	208 V three phase, A	480 V three phase, A
5	13.88	6.01
10	27.76	12.03
20	55.51	24.06
50	138.79	60.14
100	277.57	120.28

kW to amps calculator

Convert

Real power

Voltage

Phase

Power factor

Result

138.79 A

Full-load current on each line. Size breakers and conductors from the nameplate and the code, not from this figure alone.

Current per line: 138.79 A
Breaker at 125% (continuous): 175 A

How it is calculated

Amps = 50 kW × 1,000 ÷ (208 V × √3 × 1) = 138.79