This European Standard specifies minimum requirements for earthing networks and connections (bonds) in buildings in which information technology equipment is intended to be installed to protect that equipment and interconnecting cabling from electrical hazards.Additionally this European Standard specifies requirements and provides recommendations for earthing networks and connections (bonds) in order for the information technology installation to achievea) reliable signal reference,b) adequate immunity from electromagnetic interference carried by the earthing network.The requirements of this European Standard are applicable to all types of buildings ranging