The proliferation of electronic loads into industrial, commercial and residential electrical facilities, and their susceptibility to electromagnetic interference, has greatly increased the interest in considering the nature of these loads in addition to the electrical disturbances at the facility, with the purpose of establish design practices that configure a safe and efficient electrical installation. The grounding system as essential part of the electrical installation also fulfills the function of referencing electronic equipment, becoming an important component not only for the safety of the facility but also to ensure a good performance of it and to achieve power quality [1]. This paper describes the problems that generate electromagnetic interference in electronic equipment and recommended practices in the design of the grounding system, supported by technical standards, which allow mitigate them.