There are three different categories of earthing (TN, TT and IT) in low voltage distribution systems. What does the first letters represent?
A . Indicates the relationship of the power system to the exposed conductive parts of the power receiving system
B . Indicates the power system on the ground
C . Indicates the relationship between neutral N and protective earth PE
D . Indicates power receiving system exposed conductive parts and the relationship between the ground
Answer: B