GB/T 19666-2019 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 19666-2019 | English | 375 |
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General rules for flame retardant and fire resistant electric wires and cables or optical fiber cables
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| GB/T 19666-2005 | English | 75 |
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Flame retardant and fire resistant wires and cables
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GB/T 19666-2019: General rules for flame retardant and fire resistant electric wires and cables or optical fiber cables
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT19666-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.060.20
K 13
Replacing GB/T 19666-2005
General Rules for Flame Retardant and Fire Resistant
Electric Wires and Cables or Optical Fiber Cables
Issued on. DECEMBER 10, 2019
Implemented on. JULY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 6
4 General... 7
5 Product Model... 7
5.1 Code and combination of combustion characteristics... 7
5.2 Composition of product model... 9
5.3 Expression of product... 10
6 Requirements for Combustion Properties... 10
6.1 Flame retardance... 10
6.2 Fire resistance... 11
6.3 Halogen free performance... 12
6.4 Low smoke performance... 13
6.5 Low toxicity performance... 13
7 Technical Requirements... 14
7.1 Flame-retardant wire and cable or optical fiber cable series... 14
7.2 Fire-resistant wire and cable or optical fiber cable series... 15
8 Acceptance Rules... 16
Appendix A (Normative) Water Spray Test Method... 17
Appendix B (Normative) Water Spray Test Method... 19
Appendix C (Normative) Toxicity Indicator Test Method... 21
Bibliography... 27
1 Scope
This Standard specifies the code, technical requirements, test methods and acceptance rules for
the combustion characteristics of flame-retardant and fire-resistant wires, cables or optical fiber
cables, including halogen-free, low-smoke, low-toxicity, flame-retardant and fire-resistant
combustion characteristics.
This Standard applies to halogen-containing, halogen-free, low-smoke, low-toxic flame-
retardant and fire-resistant wire and cable or optical fiber cable products.
2 Normative References
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document; for the
undated documents, only the latest version (including all the amendments) is applicable to this
document.
GB/T 4208-2017 Degrees of Protection Provided by Enclosure (IP Code)
GB/T 17650.1 Test on Gases Evolved During Combustion of Materials from Cables or
Optical Fiber Cables-Part 1.Determination of the Halogen Acid Gas Content
GB/T 17650.2 Test on Gases Evolved During Combustion of Materials from Cables or
Optical Fiber Cables - Part 2.Determination of Acidity (by pH Measurement) and
Conductivity
GB/T 17651.2 Measurement of Smoke Density of Cables or Optical Fiber Cables Burning
under Defined Conditions - Part 2.Test Procedure and Requirements
GB/T 18380.12 Test on Electric and Optical Fiber Cables under Fire Conditions - Part 12.
Test for Vertical Flame Propagation for a Single Insulated Wire or Cable - Procedure for
1kW Pre-Mixed Flame
GB/T 18380.13 Tests on Electric and Optical Fiber Cables under Fire Conditions - Part 13.
Test for Vertical Flame Propagation for a Single Insulated Wire or Cable - Procedure for
Determination of Flaming Droplets/Particles
GB/T 18380.22 Tests on Electric and Optical Fiber Cables under Fire Conditions - Part 22.
Test for Vertical Flame Propagation for a Single Small Insulated Wire or Cable - Procedure
for Diffusion Flame
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply.
3.1 Flame retardance
The characteristics that, when the sample is burned under specified conditions, the spread of
flame on the sample is only within a limited range after the ignition source is removed, and it
has the capability of preventing or delaying the occurrence or spread of flame.
3.2 Fire resistance
The characteristic that a specimen can continue to operate under specified conditions when it
is burned under specified ignition source and time.
3.3 Halogen free
The characteristic that the halogen (fluorine, chlorine, bromine, iodine) content of the gas
released during combustion is all less than or equal to 1.0 mg/g.
3.4 Low smoke
The characteristic that the concentration of smoke produced by burning does not reduce
visibility (light transmittance) to the extent that it affects escape.
3.5 Low toxicity
The characteristic that the toxic effect and concentration of the toxic fumes produced during
combustion shall not cause the living organisms to die within 30min.
4 General
The combustion characteristics of flame-retardant and fire-resistant wire and cable or optical
fiber cable products shall comply with the requirements of this Standard; and other properties
other than combustion characteristics shall comply with the requirements of the corresponding
product standards.
5 Product Model
5.1 Code and combination of combustion characteristics
5.1.1 Code of combustion characteristics
The code of combustion characteristics can refer to Table 1.
5.1.2 Code combination of combustion characteristics
Flame retardant series of code combinations of combustion characteristics are shown in Table
2; fire-resistant series of code combinations of combustion characteristics are shown in Table
3.When there are multiple requirements for combustion characteristics, the code shall be
combined according to the sequence of halogen-free (halogen-containing omitted), low smoke,
low toxicity, flame retardance and fire-resistance.
5.2 Composition of product model
Flame-retardant and fire-resistant wire and cable or optical fiber cable product model consists
of the two parts, namely, the code of combustion characteristics and the model of relevant wire
and cable or optical fiber cable, see Figure 1.
or Optical Fiber Cable
5.3 Expression of product
The flame-retardance and fire-resistance wire and cable or optical fiber cable product shall be
expressed by the following contents, such as code of combustion characteristics, product model,
specification, this Standard number and product standard number.
6 Requirements for Combustion Properties
6.1 Flame retardance
6.1.1 Single-piece flame retardance
The single-piece flame retardance shall meet the requirements of Table 4.
6.1.2 Bunched flame retardance
The bunched flame retardance shall meet the requirements of Table 5.
6.2 Fire resistance
The fire resistance shall meet the requirements of Table 6.
6.4 Low smoke performance
The low smoke performance shall meet the requirements of Table 8.
6.5 Low toxicity performance
Test methods and analytical methods can refer to Appendix C.
When the application occasions of the wire and cable or optical fiber cable have low toxicity
requirements, it shall use halogen-free, low smoke and low toxicity flame retardant and / or
fire-resistant wire and cable or optical fiber cable, the toxicity index can be determined through
negotiation between the manufacturer and the purchaser. If not specified, the recommended
toxicity indicator is less than or equal to 5.
7 Technical Requirements
7.1 Flame-retardant wire and cable or optical fiber cable series
7.1.1 (Halogen-containing) flame-retardant wire and cable or optical fiber cable
(Halogen-containing) flame-retardant wire and cable or optical fiber cable are manufactured by
using halogen-containing materials; the products of combustion are more corrosive; the smoke
from combustion is denser (lower transmittance).
7.1.2 Halogen-free, low-smoke flame-retardant wire and cable or optical fiber cable
The non-metallic materials used by the halogen-free, low-smoke flame-retardant wire and cable
or optical fiber cable have very little halogen content; the combustion products are of low
corrosion; the combustion generated smoke is less (higher transmittance). The following
categories can be made according to the flame-retardant characteristics.
7.1.3 Halogen-free, low-smoke, low-toxicity flame-retardant wire and cable or optical
fiber cable
The non-metallic materials used by the halogen-free, low smoke and low toxicity flame-
retardant wire and cable or optical fiber cable shall have very little halogen content; the
combustion products are of lower corrosion and toxicity; the combustion products have lower
smoke (higher transmittance).
7.2 Fire-resistant wire and cable or optical fiber cable series
The cable at the rated voltage of 0.6/1kV and below shall use the copper conductors; the
insulation shall have fire-resistant characteristics; otherwise, the conductor and / or cable core
shall be set with fire-resistant layer. Data cables shall be set up on the cable core of the fire-
resistant layer.
8 Acceptance Rules
8.1 The basic performance of the flame-retardant and fire-resistant wire and cable or optical
fiber cable products shall meet the requirements of the relevant product standards. When the
product standard does not specify the flame resistance, fire resistance, halogen-free
performance, low smoke performance and low toxicity performance indicators, then the
provisions of this standard shall be met.
8.2 The combustion performance requirements specified in this Standard include flame
retardance (see 6.1), fire resistance (see 6.2), halogen-free performance (see 6.3), low smoke
performance (see 6.4) and low toxicity performance (see 6.5), which are the type test items.
8.3 The security requirements of flame-retardant and fire-resistant wire and cable or optical
fiber cable are higher. Given the actual situation of wire and cable or optical fiber cable
materials often changes, the manufacturers shall conduct strict quality control; establish the
appropriate intermediate quality control means; develop the appropriate combustion
performance sampling test cycle; so as to ensure product quality.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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