The two types of earthing are Familiar as Equipment earthing
and System earthing. In Equipment earthing: body (non
conducting part) of the equipment should be earthed
to safeguard the human beings. System Earthing: In this neutral
of the supply source (Transformer or Generator) should be grounded. With this, in case of unbalanced loading neutral will not be
shifted .so that unbalanced voltages will not arise. We can protect the
equipment also. With size of the equipment ( transformer or alternator)and
selection of relying system earthing
will be further classified into directly earthed, Impedance earthing,resistive
(NGRs) earthing
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