Local earth (IEC, UK) or local ground (US): a part of the Earth that is in electric contact with an earth electrode and that has an electric potential not
necessarily equal to zero [defined in the IEC 60050-195-2021].
A local earth is that part of the Earth which is exposed to the electric current flowing from an earth electrode placed therein. This earth electrode belongs to an earthing arrangement of some kind. Under these conditions, the electric potential of the local earth may differ significantly from the zero electric potential of the reference earth.