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GB/T 16895.3-2017 English PDF (GBT16895.3-2017)

GB/T 16895.3-2017 English PDF (GBT16895.3-2017)

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GB/T 16895.3-2017: Low-voltage electrical installations -- Part 5-54: Selection and erection of electrical equipment -- Earthing arrangements and protective conductors

GB/T 16895.3-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.50
Q 77
GB/T 16895.3-2017 / IEC 60364-5-54.2011
Replacing GB/T 16895.3-2004
Low-Voltage Electrical Installations – Part 5-54.
Selection and Erection of Electrical Equipment –
Earthing Arrangements and Protective Conductors
(IEC 60364-5-54.2011, IDT)
ISSUED ON. JULY 31, 2017
IMPLEMENTED ON. FEBRUARY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
541 General... 5
541.1 Scope... 5
541.2 Normative references... 5
541.3 Terms and definitions... 6
542 Earthing Arrangements... 8
542.1 General requirements... 8
542.2 Earth electrodes... 9
542.3 Earthing conductors... 12
542.4 Main earthing terminal... 12
543 Protective Conductors... 13
543.1 Minimum cross-sectional areas... 13
543.2 Types of protective conductors... 15
543.3 Electrical continuity of protective conductors... 16
543.4 PEN, PEL or PEM conductors... 17
543.5 Combined protective and functional earthing conductors... 19
543.6 Currents in protective earthing conductors... 19
543.7 Reinforced protective earthing conductors for protective earthing conductor currents exceeding 10 mA... 20
543.8 Arrangement of protective conductors... 20
544 Protective Bonding Conductors... 20
544.1 Protective bonding conductors for connection to the main earthing terminal... 20 544.2 Protective bonding conductors for supplementary bonding... 21
Annex A (Normative) Method for Deriving the Factor k in 543.1.2 (See also IEC 60724 and IEC 60949)... 22
Annex B (Informative) Example of Earthing Arrangements and Protective Conductors ... 26
Annex C (Informative) Erection of Concrete-Embedded Foundation Earth Electrodes ... 28
Annex D (Informative) Erection of Soil-Embedded Earth Electrodes... 31
Bibliography... 36
Foreword
GB/T 16895 Low-Voltage Electrical Installations can be divided into 5 parts, which may be further divided into several sub-parts.
--- Part 1.Fundamental Principles Assessment of General Characteristics Definitions; --- Part 4.Protection for Safety;
--- Part 5.Selection and Erection of Electrical Equipment;
--- Part 6.Acceptance;
--- Part 7.Requirements for Special Installations and Locations.
This Part is Part 5 of GB/T 16895.Part 5-54.Selection and Erection of Electrical Equipment. This Part was drafted as per the rules specified in GB/T 1.1-2009.
This Part replaced GB/T 16895.3-2004 Electrical Installations of Buildings - Part 5-54. Selection and Erection of Electrical Equipment - Earthing Arrangements, Protective Conductors and Protective Bonding Conductors. Compared with GB/T 16895.3-2004, the major technical changes of this Part are as follows.
--- Change the standard name into “Low-Voltage Electrical Installations – Part 5-54. Selection and Erection of Electrical Equipment – Earthing Arrangements and Protective Conductors”.
--- Clarify the definition of protective conductors. When used for electric shock protection, protective conductors include protective bonding conductors, protective earthing conductors and grounding conductors. In order to avoid confusion between protective conductors and protective earthing conductors, where protective conductors are specifically referred to as protective earthing conductors, this Part uses protective earthing conductors instead of protective conductors;
--- Add three examples of PEN conductor connection in the main switchboard; --- Add Appendix C (Informative) "Erection of Concrete-Embedded Foundation Earth Electrodes";
--- Add Appendix D (Informative) "Erection of Soil-Embedded Earth Electrodes". This part used translation method to equivalently adopt IEC 60364-5-54.2011 Low-Voltage Electrical Installations – Part 5-54.Selection and Erection of Electrical Equipment – Earthing Arrangements and Protective Conductors.
The Chinese documents that have consistent correspondence with the international documents cited in this Part are as follows.
--- GB/T 7251.1-2013 Low-voltage switchgear and controlgear assemblies - Part 1.General rules (IEC 61439-1.2011, IDT)
--- GB/T 7251.12-2013 Low-voltage switchgear and controlgear assemblies - Part 2.Power switchgear and controlgear assemblies (IEC 61439-2.2011, IDT)
--- GB/T 15544.1-2013 Short-circuit Current Calculation in Three-phase A.C. Systems - Part 1.Calculation of Currents (IEC 60909-0.2001, IDT)
--- GB/T 21714 (all parts) [IEC 62305 (all parts)]
Compared with IEC 60364-5-54.2011, this Part has completely the same clause No., and completely the same technical contents; however, it only makes the following editorial modification.
--- Delete “Annex E” of IEC standard.
This Part was proposed by and under the jurisdiction of National Technical Committee on Building Electrical Devices of Standardization Administration of China (SAC/TC 205). Drafting organizations of this Part. China Aviation Planning and Design Institute (Group) Co., Ltd.; and China Electric Design Research Institute of MMI.
Participating drafting organizations of this Part. China Machinery International Engineering Design and Research Institute Co., Ltd.; Machinery Industry Beijing Electrotechnical Institute of Economic Research; and Siemens Ltd. China.
Chief drafting staffs of this Part. Liu Pingzhou, Su Biping, Ding Jie, Wang Zengyao, Li Xianfeng, Zhu Shanshan, Li Feng, and Hu Hongyu.
The historical editions replaced by this Part are as follows.
--- GB 16895.3-1993, GB/T 16895.3-2004.
Low-Voltage Electrical Installations – Part 5-54.
Selection and Erection of Electrical Equipment –
Earthing Arrangements and Protective Conductors
541 General
541.1 Scope
This Part of GB/T 16895 addresses the earthing arrangements and protective conductors including protective bonding conductors in order to satisfy the safety of the electrical installation.
541.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 16895.10-2010 Low-voltage electrical installations - Part 4-44.Protection for safety - Protection against voltage disturbances and electromagnetic disturbances (IEC 60364-4- 44.2007, IDT)
GB/T 16895.18-2010 Electrical installations of buildings - Part 5-51.Selection and erection of electrical equipment - Common rules (IEC 60364-5-51.2005, IDT) GB/T 16895.21-2011 Low-voltage electrical installations - Part 4-41.Protection for safety - Protection against electric shock (IEC 60364-4-41.2005, IDT)
GB/T 17045-2008 Protection against electric shock - Common aspects for installation and equipment (IEC 61140.2001, IDT)
GB/T 21714.3-2008 Protection against lightning - Part 3.Physical damage to structures and life hazard (IEC 62305-3.2006, IDT)
IEC 60439-2, Low-voltage switchgear and controlgear assemblies – Part 2.Particular requirements for busbar trunking systems (busways)
IEC 60724, Short-circuit temperature limits of electric cables with rated voltages of 1 kV (Um = 1.2 kV) and 3 kV (Um = 3.6 kV)
IEC 60909-0, Short-circuit currents in three-phase A.C. systems – Part 0.Calculation of currents

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