Electrical installations of buildings—Part 5-54:Selection and erection of electrical equipment—Earthing arrangements,protective conductors and protective bonding conductors
This Part of series standard "Electrical Installations of Buildings" addresses the earthing arrangements, protective conductors and protective bonding conductors in order to satisfy the safety of the electrical installation.
Foreword III 541 General 541.1 Scope 541.2 Normative references 541.3 Definitions 542 Earthing arrangements 542.1 General requirements 542.2 Earth electrodes 542.3 Earthing conductors 542.4 Main earthing terminal 543 Protective conductors 543.1 Minimum cross-sectional areas 543.2 Types of protective conductors 543.3 Electrical continuity of protective conductors 543.4 PEN conductors 543.5 Combined protective and functional earthing 543.6 Arrangement of protective conductors 543.7 Reinforced protective conductors for protective conductor currents exceeding 10 mA 544 Protective bonding conductors (equipotential bonding conductors) 544.1 Protective bonding conductors for the connection to the main earthing terminal 544.2 Protective bonding conductors for supplementary bonding Appendix A (Normative) Method for Deriving the Factor k in 543.1.2 (see also IEC 60724 and IEC 60949) Appendix B (Informative) Illustration of Earthing Arrangements, Protective Conductors and Protective Bonding Conductors Table 54.1 Common Minimum Sizes for Earth Electrodes of Commonly Used Material from the Point of View of Corrosion and Mechanical Strength where Embedded in the Soil Table 54.2 Minimum Cross-sectional areas of Earthing Conductors Buried in the Soil Table 54.3 Minimum Cross-sectional Area of Protective Conductors Table A.54.1 Value of Parameters for Different Materials Table A.54.2 Values of k for Insulated Protective Conductors not Incorporated in Cables and not Bunched with other Cables Table A.54.3 Values of k for Bare Protective Conductors in Contact with Cable Covering but not Bunched with other Cables Table A.54.4 Values of k for Protective Conductors as a Core Incorporated in a Cable or Bunched with other Cables or Insulated Conductors Table A.54.5 Values of k for Protective Conductors as a Metallic Layer of a Cable e.g. Armour, Metallic Sheath, Concentric Conductor, etc. Table A.54.6 Value of k for Bare Conductors where there is no Risk of Damage to any Neighbouring Material by the Temperature Indicated Bibliography
