leakage current

  • hello everyone, it's been a while, I would like to know what makes a PC always has a leakage current (I do not know if the translation is good, so small example: phase 1: 5A, neutral : 4.990A) I would like ask to my teacher eleec but it will take 2 hours for explain and do not answer my question; do you know why ?

    Dark is my blackness

    Edited once, last by dark68360 ().