GB/T 18380.33-2022Tests on electric and optical fibre cables under fire conditions - Part 33: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A (English PDF)
电缆和光缆在火焰条件下的燃烧试验 第33部分：垂直安装的成束电线电缆火焰垂直蔓延试验 A类
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
April 15, 2022
Implementation date
November 1, 2022
Scope
GB/T 18380.33-2022 is the English-translated version of 电缆和光缆在火焰条件下的燃烧试验 第33部分：垂直安装的成束电线电缆火焰垂直蔓延试验 A类.
GB/T 18380.33-2022 is the Chinese standard "Tests on electric and optical fibre cables under fire conditions - Part 33: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A".
Its scope clause reads: This document describes the Class A test method for evaluating the suppression of flame sag under specified conditions of vertically installed bundled electrical or optical cables.
The ability to spread straight. This document applies to the total nominal volume of non-metallic materials contained in the cable or optical cable sample section installed on the test steel ladder of 7L/m.
The fire time is 40min. Cables and optical cables are installed in front of the steel ladder, and cables with a conductor cross-section greater than 35mm2 are based on the number of cable sample segments.
Choose standard steel ladders or wide steel ladders, and use standard steel ladders for cables and optical cables with conductor cross-sections of 35mm2 and below.
Class A is used to assess high In the case of the volume content of metal materials. This test is used for type approval test. See Appendix A for the selection requirements for test cables and optical cables.
Flame spread through cable and fiber optic test The damage range of the sample is determined. This test procedure can be used to verify the ability of electrical and fiber optic cables to suppress the spread of flames.
Recommended performance requirements are given in Appendix B. Note. The term "wire and cable" in this document includes all metal conductor insulated cables used for power or signal transmission. Its clauses include terms and definitions.
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Document preview — GB/T 18380.33-2022
National Standard of the People's Republic of China
- Classification
- K 13
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- Preface
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Test device
- 5 Test Step
- 6 Evaluation of test results
- 7 Performance Requirements
- 8 Recheck step
- 9 Test report
- Appendix A (Normative) Guidelines for the Selection of Cables and Optical Cables for Type Approval Tests
- Appendix B (Informative) Recommended Performance Requirements
1 Scope
This document describes the Class A test method for evaluating the suppression of flame sag under specified conditions of vertically installed bundled electrical or optical cables.
The ability to spread straight.
This document applies to the total nominal volume of non-metallic materials contained in the cable or optical cable sample section installed on the test steel ladder of 7L/m.
The fire time is 40min. Cables and optical cables are installed in front of the steel ladder, and cables with a conductor cross-section greater than 35mm2 are based on the number of cable sample segments.
Choose standard steel ladders or wide steel ladders, and use standard steel ladders for cables and optical cables with conductor cross-sections of 35mm2 and below. Class A is used to assess high
In the case of the volume content of metal materials.
This test is used for type approval test. See Appendix A for the selection requirements for test cables and optical cables. Flame spread through cable and fiber optic test
The damage range of the sample is determined. This test procedure can be used to verify the ability of electrical and fiber optic cables to suppress the spread of flames.
Recommended performance requirements are given in Appendix B.
Note. The term "wire and cable" in this document includes all metal conductor insulated cables used for power or signal transmission.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.
IEC 60332-3-10 Fire tests for electrical and optical cables under flame conditions - Part 3-10.Vertically installed bundled wires and cables
Note. GB/T 18380.31-2022 Fire test of cables and optical cables under flame conditions - Part 31.Vertically installed bundled wire and cable flame
Straight propagation test test device (IEC 60332-3-10.2018, IDT)
IEC 60811-606 Electrical and optical cables - Test methods for non-metallic materials - Part 606.Methods of measuring density for physical and chemical tests
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 ignition source
A source of energy that initiates combustion.
[Source. ISO 13943.2017, 3.219] […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
Referenced standards
Normative references
IEC 60332 · IEC 60811
Cited by
- GB/T 22577-2025Class 1E cables for nuclear power generating stations - General requirements
- GB 43069-2023Safety requirements for mine cable
- NB/T 20420-2017Qualification of class 1E electric cables and splices for nuclear power plants
- NB/T 42050-2015Optical fiber composite medium-voltage cable
- NB/T 42051-2015Cross-linked polyethylene insulated cables with aluminum alloy conductor for rated voltage of 0.6/1kV
- NB/T 20213-2013Qualification Procedure for Safety Class Cable & Field Splice of Nuclear Power Plants
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Related Standards
GB/T 18380.31-2022 — Tests on electric and optical fibre cables under fire conditions - Part 31: Test for vertical flame spread of vertically-mounted bunched wires or cables - Apparatus
GB/T 18380.11-2022 — Tests on electric and optical fibre cables under fire conditions - Part 11: Test for vertical flame propagation for a single insulated wire or cable - Apparatus
GB/T 18380.12-2008 — Test on electric and optical fibre cables under fire conditions -- Part 12: Test for vertical flame propagation for a single insulated wire or cable -- Procedure for 1kW pre-mixed flame
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