Technical specification for inspection of lightning protection systems of buildings
1 Scope
This document specifies the inspection classification and items, inspection requirements and methods, periodic inspection period, inspection procedure, inspection records, conclusive judgment and reports in connection with lightning protection systems of buildings.
This document is applicable to the inspection of lightning protection systems of buildings.
This document is not applicable to:
a) railway systems;
b) vehicles, ships, aircrafts and offshore installations; or
c) underground high-pressure pipelines; and pipelines, power lines and communication lines not connected with the buildings.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions 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 18802.11 Low-voltage surge protective devices (SPD) - Part 11: Surge protective devices connected to low-voltage power systems - Requirements and test methods
GB/T 32938-2016 Service specifications for inspection of lightning protection system
GB 50057-2010 Code for design protection of structures against lightning
GB 50601-2010 Code for construction and quality acceptance for lightning protection engineering of structures
GB 50952-2013 Technical code for lightning protection engineering for rural residential areas
GB 51017-2014 Technical code for lighting protection engineering of ancient buildings
GB 55024-2022 General code for building electricity and intelligence
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
lightning protection system; LPS
the whole system used to lessen personal injury and physical damage caused by lightning strikes on a building
Note: LPS consists of external and internal lightning protection devices.
[Source: GB/T 21714.1-2015, 3.42, modified]
3.2
inspection of lightning protection system
the whole process of inspection, measurement, and comprehensive analysis and processing of information to determine whether the lightning protection system meets the requirements of relevant standards
4 Inspection classification and items
4.1 Inspection classification
4.1.1 The inspection is divided into acceptance inspection and periodic inspection. Where,
a) Acceptance inspection refers to the inspection conducted before the lightning protection systems of buildings newly built, rebuilt and expanded are put into use;
b) Periodic inspection is the inspection of lightning protection devices after the buildings are put into use according to the specified period.
4.1.2 The items and sub-items of acceptance inspection and periodic inspection shall comply with the requirements of Annex A.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Inspection classification and items
5 Inspection requirements and methods
6 Periodic inspection period
7 Inspection procedure
8 Inspection records, conclusive judgment and reports
Annex A (Normative) Items for acceptance inspection and periodic inspection
Annex B (Informative) Zoning of explosive atmospheres and classification of lightning protection
Annex C (Informative) Main performance and parameter indexes of common inspection instruments
Annex D (Normative) Measurement of transition resistance
Annex E (Normative) Measurement of grounding resistance
Annex F (Normative) Measurement of soil resistivity
Annex G (Normative) Conversion of shock ground resistance and power frequency ground resistance of the grounding device
Annex H (Normative) Measurement of the magnetic field of lightning electromagnetic pulse
Annex I (Normative) Measurement of the breaking time (to) of the minimum instantaneous operating current of SSD
Annex J (Normative) Measurement of varistor voltage (Vy), leakage current (I) and insulation resistance (R) of the surge protective device(SPD)
Annex K (Normative) Rules of rounding off for numerical values, and expression and judgment methods of limiting values
Annex L (Informative) Template of the lightning protection system inspection report
Bibliography
Technical specification for inspection of lightning protection systems of buildings
1 Scope
This document specifies the inspection classification and items, inspection requirements and methods, periodic inspection period, inspection procedure, inspection records, conclusive judgment and reports in connection with lightning protection systems of buildings.
This document is applicable to the inspection of lightning protection systems of buildings.
This document is not applicable to:
a) railway systems;
b) vehicles, ships, aircrafts and offshore installations; or
c) underground high-pressure pipelines; and pipelines, power lines and communication lines not connected with the buildings.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions 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 18802.11 Low-voltage surge protective devices (SPD) - Part 11: Surge protective devices connected to low-voltage power systems - Requirements and test methods
GB/T 32938-2016 Service specifications for inspection of lightning protection system
GB 50057-2010 Code for design protection of structures against lightning
GB 50601-2010 Code for construction and quality acceptance for lightning protection engineering of structures
GB 50952-2013 Technical code for lightning protection engineering for rural residential areas
GB 51017-2014 Technical code for lighting protection engineering of ancient buildings
GB 55024-2022 General code for building electricity and intelligence
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
lightning protection system; LPS
the whole system used to lessen personal injury and physical damage caused by lightning strikes on a building
Note: LPS consists of external and internal lightning protection devices.
[Source: GB/T 21714.1-2015, 3.42, modified]
3.2
inspection of lightning protection system
the whole process of inspection, measurement, and comprehensive analysis and processing of information to determine whether the lightning protection system meets the requirements of relevant standards
4 Inspection classification and items
4.1 Inspection classification
4.1.1 The inspection is divided into acceptance inspection and periodic inspection. Where,
a) Acceptance inspection refers to the inspection conducted before the lightning protection systems of buildings newly built, rebuilt and expanded are put into use;
b) Periodic inspection is the inspection of lightning protection devices after the buildings are put into use according to the specified period.
4.1.2 The items and sub-items of acceptance inspection and periodic inspection shall comply with the requirements of Annex A.
Contents of GB/T 21431-2023
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Inspection classification and items
5 Inspection requirements and methods
6 Periodic inspection period
7 Inspection procedure
8 Inspection records, conclusive judgment and reports
Annex A (Normative) Items for acceptance inspection and periodic inspection
Annex B (Informative) Zoning of explosive atmospheres and classification of lightning protection
Annex C (Informative) Main performance and parameter indexes of common inspection instruments
Annex D (Normative) Measurement of transition resistance
Annex E (Normative) Measurement of grounding resistance
Annex F (Normative) Measurement of soil resistivity
Annex G (Normative) Conversion of shock ground resistance and power frequency ground resistance of the grounding device
Annex H (Normative) Measurement of the magnetic field of lightning electromagnetic pulse
Annex I (Normative) Measurement of the breaking time (to) of the minimum instantaneous operating current of SSD
Annex J (Normative) Measurement of varistor voltage (Vy), leakage current (I) and insulation resistance (R) of the surge protective device(SPD)
Annex K (Normative) Rules of rounding off for numerical values, and expression and judgment methods of limiting values
Annex L (Informative) Template of the lightning protection system inspection report
Bibliography
