Foundation earthing is a method to reduce the risk of electrocution and damage to electrical equipment. It consists of connecting the foundations of a building or structure to an  earthing electrodes system.

The purpose of this connection is to allow static electricity and electrical charges to flow to earth rather than accumulate in the structure. Foundations are often in direct contact with the ground, which ensures a good connection to the earth circuit.

Foundation earthing is particularly important in large buildings and structures, where the accumulation of electrical charges can be consequential. If these charges are not dissipated properly, they can cause damage to electrical equipment, or worse, serious injuries.

Foundation earthing can be accomplished in various ways, such as by using cable or flat conductor, connected to  earth rods or by surrounding the foundation with conductor that enters the foundation through an earth terminal. Grounding standards, such as IEEE 80 Standard, provide guidelines for the design and installation of earthing systems, including those for foundations.