3.3.6:how to connect a protective impedance? and how is it realized to protect persons from electric shock?
11.3:how to understand the term of "Bridging of insulation"?
13.3: for the second sentence of the third paragragh, how to apply the hi-pot?
16.2: for the fifth paragragh, why are the leakage current doubled in those circumstances?Can u explain to me one by one?
19.7: for the second paragragh, how to understand it?