\begin{align} &\cssId{Step1}{P_{elèc} = I·(U·cosφ)}\\[3px] &\cssId{Step2}{I = {P_{elèc}\over{U·cosφ}}}\\[3px] &\cssId{Step3}{I = {2906,667\over{230·0,85}} = 14,868A}\\[3px] \end{align}