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Scope

The question of whether or not to ground a power system is one which mu9t be faced sometime by most engineers charged with planning industrial distribution. A decision in favor of a grounded system leads then to the question of how to ground. It is the intent of this chapter to assist the planning engineer to answer these and other more detailed questions on the subject, by presenting basic reasons for grounding or not grounding and by reviewing general practices and methods of system grounding.

Abstract

- Superseded. Looking at the problem from an overall standpoint, the grounding of the system would in most cases be done by making a metallic connection direct or through an impedance between transformer or generator neutrals and the building grounding system which is described in Chapter II. The grounding system described in Chapter II in turn is connected to earth through the system of ground rods and water pipes described in Chapter IV. The protective systems discussed for static and lightning protection in Chapter III would likewise be connected to the ground rods and water pipe system as outlined in Chapter IV.
 

Document History

  1. IEEE 142-2007


    IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems

    • Most Recent
  2. IEEE 142-1991


    IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems

    • Historical Version
  3. IEEE 142-1982


    IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems (IEEE Green Book)

    • Historical Version
  4. IEEE 142-1956

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    IEEE Grounding of Industrial Power Systems

    • Historical Version