50 kW to Amps
50 kW is 217.4 A at 230 V and 416.7 A at 120 V (single-phase, power factor 1). Table for DC and three-phase, power factor 0.8, and the formula.
Formula
Worked example
- I = 50 × 1,000 / (230 × 1) = 217.4 A
- With a power factor of 0.9: I = 50 × 1,000 / (230 × 0.9) = 241.5 A
On other supplies
| Supply | Voltage | Current at pf 1 | Current at pf 0.8 |
|---|---|---|---|
| DC | 12 V | 4,167 A | not used |
| DC | 24 V | 2,083 A | not used |
| DC | 48 V | 1,042 A | not used |
| Single-phase | 120 V | 416.7 A | 520.8 A |
| Single-phase | 230 V | 217.4 A | 271.7 A |
| Single-phase | 240 V | 208.3 A | 260.4 A |
| Three-phase | 208 V | 138.8 A | 173.5 A |
| Three-phase | 400 V | 72.17 A | 90.21 A |
| Three-phase | 415 V | 69.56 A | 86.95 A |
| Three-phase | 480 V | 60.14 A | 75.18 A |
Three-phase rows use the line-to-line voltage. DC ignores the power factor.
What 50 kW looks like
50 kW is a fast DC electric vehicle charger, or the load of a small shop or workshop.
This is an estimate of the load current only. Choosing a cable or a breaker also needs the installation method, the ambient temperature, the voltage drop and the rules you work to.
Frequently asked questions
How many amps is 50 kilowatts?
50 kW is 217.4 A on a 230 V single-phase supply and 416.7 A on 120 V, both with a power factor of 1. The current depends on the voltage, so it is a different answer on every supply.
What if the power factor is not 1?
The current rises. At 230 V and a power factor of 0.9, 50 kW draws 241.5 A. Heaters and filament lamps are close to 1, while motors and many power supplies are lower.
What about a three-phase supply?
50 kW on 400 V three-phase at a power factor of 0.8 is 90.21 A. The line voltage is used with the factor √3 (about 1.732).
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