In the grounding system, the ground rods ( earth rods ) are able to provide physical connection with the and the instrument will dissipate current into it. Generally, there are two types of electrodes:They are intrinsic and include the metal underground pipe, metal frame of the buildings and the reinforcing bars of concrete foundations,They are installed to improve the performance of grounding system. This includes wire mesh wire meshes, metallic plates, and buried copper conductor etc.