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GB/T 18380.35-2022Tests on electric and optical fibre cables under fire conditions - Part 35: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category C (English PDF)

电缆和光缆在火焰条件下的燃烧试验第35部分：垂直安装的成束电线电缆火焰垂直蔓延试验 C类

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

March 9, 2022

Implementation date

October 1, 2022

Scope

GB/T 18380.35-2022 is the English-translated version of 电缆和光缆在火焰条件下的燃烧试验第35部分：垂直安装的成束电线电缆火焰垂直蔓延试验 C类.

GB/T 18380.35-2022 is the Chinese standard "Tests on electric and optical fibre cables under fire conditions - Part 35: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category C".

Its scope clause reads: This document describes the Class C test method for evaluating the suppression of flame sag under specified conditions of vertically installed bundled wire, cable or fiber optic cables.

The ability to spread straight. This document applies to the cable and optical cable sample sections installed on the test steel ladder containing a nominal total volume of 1.5L/m of non-metallic materials.

The fire time is 20min. Cables and optical cables are installed in front of the steel ladder, and category C is used to evaluate the occasions with low volume content of non-metallic 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 18380.35-2022

National Standard of the People's Republic of China

Classification: K 13

Issued by: State Administration for Market Regulation, China National Standardization Administration

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 Test
Appendix B (Informative) Recommended Performance Requirements

1 Scope

This document describes the Class C test method for evaluating the suppression of flame sag under specified conditions of vertically installed bundled wire, cable or fiber optic cables.

The ability to spread straight.

This document applies to the cable and optical cable sample sections installed on the test steel ladder containing a nominal total volume of 1.5L/m of non-metallic materials.

The fire time is 20min. Cables and optical cables are installed in front of the steel ladder, and category C is used to evaluate the occasions with low volume content of non-metallic 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]

3.2 charcoal

Carbon residues from pyrolysis or incomplete combustion.

[Source. ISO 13943.2017, 3.47] […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 22 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 18380.31-2022Tests on electric and optical fibre cables under fire conditions - Part 31: Test for vertical flame spread of vertically-mounted bunched wires or cables - Apparatus

IEC 60332 · IEC 60811

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