Earthing system are established mainly in order to limit the tension that, with respect to Earth, can present at a given moment the metallic masses, to assure the performance of the protections and to eliminate or to reduce the risk that a breakdown in the Electrical materials used.

(Complementary Technical Instruction 18, Spain) 

malla-a-tierra   PICA-A-TIERRA

jabalina   Pica-de-Tierra

Trenza tierra   Barra-de-tierra

Barra-equipotencial   bentonite