Power System

Single Phase Current

I = P / (V \times PF)

Variables

I Line current A
P Active power W
V Supply voltage V
PF Power factor -

Engineering Example

A 3 kW, 230 V load at PF 0.9 draws I = 3000 / (230 x 0.9) = 14.49 A.

Practical Site Example

Used on site to confirm a single-phase feeder breaker is correctly rated before energizing a panel.