Protective equipotential bonding refers to protection against electric shock by dissipating potential from conductive parts in the building, especially if these are introduced from the outside. These include, for example, gas, water and heating pipes, but also large metal constructions (running through the building), provided that they can be touched freely, e.g. in steel frame construction. By connecting the equipotential bonding rail to the earthing, the protective equipotential bonding is achieved.
Source: bauwion
