Earthing through impedance

Providing by plate earthing

Increasing conductor size

Providing parallel earthing

Converts A.C. into D.C

Reverses the polarity of D.C

Changes D.C. supply into A.C supply

Reverses the direction of rotation of the generator

Cost is less

More flexible

Less voltage drop

More insulation resistance

Providing double earthing

Reducing the pit depth for earthing

Increasing the length of the electrodes

Decreasing the length of the electrodes

Provide electrostatic shield

Protect the coils in the meter

Reduce the value of current in the meter

Avoid the effect of electrolytic emf interference