GB/T 19666-2019_English: PDF (GB/T19666-2019)
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| Standard ID | GB/T 19666-2019 (GB/T19666-2019) | | Description (Translated English) | General rules for flame retardant and fire resistant electric wires and cables or optical fiber cables | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K13 | | Classification of International Standard | 29.060.20 | | Word Count Estimation | 22,273 | | Date of Issue | 2019-12-10 | | Date of Implementation | 2020-07-01 | | Older Standard (superseded by this standard) | GB/T 19666-2005 | | Quoted Standard | GB/T 4208-2017; GB/T 17650.1; GB/T 17650.2; GB/T 17651.2; GB/T 18380.12; GB/T 18380.13; GB/T 18380.33; GB/T 18380.34; GB/T 18380.35; GB/T 18380.36; GB/T 19216.21; GB/T 19216.23; GB/T 19216.25; IEC 60331-1; IEC 60331-2; IEC 60684-2: 2011; IEC 60754-3 | | Drafting Organization | Shanghai Cable Research Institute Co., Ltd., Shanghai State Cable Testing Center Co., Ltd., Sichuan Fire Research Institute of Emergency Management Department, East China Architectural Design and Research Institute Co., Ltd., Jiangsu Hengtong Power Cable Co., Ltd., Jiangsu Shangshang Cable Group Co., Ltd., Far East Cable Co., Ltd. , Zhejiang Wanma Co., Ltd., Guangzhou Nanyang Cable Co., Ltd., Jiangsu Zhongtian Technology Co., Ltd., Baosheng Technology Innovation Co., Ltd., Shanghai Kaibo Species Cable Material Factory Co., Ltd., Long-distance Cable Co., Ltd., Shanghai Maple Cable Co., Ltd., Guangdong Xinyaguang Cable Industry Co., Ltd., Jinbei Electric Co., Ltd., Wuxi Jiangnan Cable Co., Ltd., Shanghai Pudong Wire and Cable (Group) Co., Ltd., Kunming Cable Group Co., Ltd., Shandong Hualing Cable Co., Ltd., China Quality Certification | | Administrative Organization | National Standardization Technical Committee of Wire and Cable (SAC/TC 213) | | Proposing organization | China Electrical Equipment Industry Association | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | | Summary | 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 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 cable products. | | Standard ID | GB/T 19666-2005 (GB/T19666-2005) | | Description (Translated English) | Flame retardant and fire resistant wires and cables | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K13 | | Classification of International Standard | 29.060.20 | | Word Count Estimation | 15,157 | | Date of Issue | 2005-02-06 | | Date of Implementation | 2005-08-01 | | Quoted Standard | GB/T 17650.2-1998; GB/T 17651.2-1998; GB/T 18380.1-2001; GB/T 18380.2-2001; GB/T 18380.3-2001; GB/T 19216.21-2003; GB/T 19216.23-2003; IEC 60332-3-25: 2000 | | Drafting Organization | Shanghai Electric Cable Research Institute | | Administrative Organization | National Standardization Technical Committee of wire and cable | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 4, 2005 (No. 78 overall) | | Proposing organization | China Electrical Appliances Industry Association | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee | | Summary | This standard specifies the flame retardant and fire-resistant wires and cables including halogen, halogen, low smoke and other characteristics of the model, technical requirements, test methods and acceptance criteria. This standard applies include halogen, halogen, low smoke and fire retardant wire and cable. |
GB/T 19666-2019
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
General Rules for Flame Retardant and Fire Resistant
Electric Wires and Cables or Optical Fiber Cables
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
GB/T 18380.33 Tests on Electric and Optical Fiber Cables under Fire Conditions - Part 33:
Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or Cables - Category
GB/T 18380.34 Tests on Electric and Optical Fiber Cables under Fire Conditions - Part 34:
Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or Cables - Category
GB/T 18380.35 Tests on Electric and Optical Fiber Cables under Fire Conditions - Part 35:
Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or Cables - Category
GB/T 18380.36 Tests on Electric and Optical Fibre Cables under Fire Conditions - Part 36:
Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or Cables - Category
GB/T 19216.21 Tests for Electric Cables under Fire Conditions - Circuit Integrity - Part
21: Procedures and Requirements - Cables of Rated Voltage up to and including 0.6/1.0kv
GB/T 19216.23 Tests for Electric Cables under Fire Conditions - Circuit Integrity - Part
23: Procedures and Requirements - Electric Data Cables
GB/T 19216.25 Tests for Electric Cables under Fire Conditions - Circuit Integrity - Part
25: Procedures and Requirements - Optical Fiber Cables
IEC 60331-1 Tests for Electric Cables under Fire Conditions – Circuit Integrity – Part 1:
Test Method for Fire with Shock at a Temperature of at least 830°C for Cables of Rated
Voltage up to and including 0.6/1.0kV and with an Overall Diameter Exceeding 20mm
IEC 60331-2 Tests for Electric Cables under Fire Conditions – Circuit Integrity – Part 2:
Test Method for Fire with Shock at a Temperature of at least 830°C for Cables of Rated
Voltage up to and including 0.6/1.0kV and with an Overall Diameter not Exceeding 20mm
IEC 60684-2:2011 Flexible Insulting Sleeving – Part 2: Methods of Test
IEC 60754-3 Test on Gases Evolved during Combustion of Materials from Cables – Part
3: Measurement of Low Level of Halogen Content by Ion Chromatography
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.
Wire and cable or optical fiber cable products may reduce their original basic characteristics
while achieving their flame retardance and/or fire resistance purposes, or cause some original
test methods to be inapplicable. All parties using this Standard shall discuss or negotiate a
suitable solution to ensure that the wire and cable or optical fiber cable products achieve the
purpose of flame retardance and/or fire resistance while ensuring safety and reliability during
use. On the premise of without reducing the safety and reliability during use, the corresponding
technical indicators or test methods can be adjusted appropriately.
5 Product Model
5.1 Code and combination of combustion characteristics
5.1.1 Code of combustion characteristics
Halogen-free, low-smoke, flame-retardant wire and cable or optical fiber cable sheathing and /
or insulation can select halogen-free, low-smoke, flame-retardant materials; and the
performance shall be in line with the requirements of relevant product standards. Filling,
wrapping or flame-retardant reinforcement layer and other auxiliary materials shall be selected
appropriately, so that the product meets the requirements of the corresponding flame retardant
category.
The non-metallic materials used by the halogen-free, low-smoke, flame-retardant wire and
cable or optical fiber cable shall meet the requirements of halogen-free performance. The
acidity and electrical conductivity of the released gas, halogen acid gas release or the halogen
content during the combustion of the non-metallic materials shall meet the requirements of 6.3;
the smoke density (minimum transmittance) of the finished products shall meet the
requirements of 6.4.
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). It can be divided into the following categories according to the
flame-retardant characteristics:
--- halogen-free, low smoke, low toxicity, single-piece flame-retardant WDUZ, the single-
piece flame retardance shall meet the requirements of 6.1.1;
--- Halogen-free, low smoke, low toxicity, bunched flame-retardant WDUZA, WDUZB,
WDUZC, WDUZD, the bunched flame-retardance shall meet the requirements of 6.1.2.
Halogen-free, low smoke, low toxicity flame-retardant wire and cable or optical fiber cable
sheathing and / or insulation can select halogen-free, low smoke, low toxicity flame-retardant
materials; the performance shall meet the requirements of the relevant product standards.
Filling, wrapping or flame-retardant reinforcement layer and other auxiliary materials shall be
properly selected to make the product meet the requirements of the corresponding flame-
retardant category.
The non-metallic materials used by the halogen-free, low smoke, low toxicity flame-retardant
wire and cable or optical fiber cable shall meet the requirements of halogen-free and low
toxicity; the acidity and electrical conductivity of the released gas, halogen acid gas release
or halogen content during the combustion of the non-metallic materials shall meet the
requirements of 6.3; the toxicity indicator shall meet the requirements of 6.5; the smoke density
(minimum transmittance) of the finished products shall meet the requirements of 6.4.
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. The commonly-used refractory layer shall be wrapped by the refractory mica
tape; its thickness, the number of layers, and erect rate of winding, and other parameters shall
be determined by the manufacturer according to the manufacturing process, product rated
voltage and mica tape characteristics and other factors. The refractory layer is allowed to be set
on the enhancement layer. The fire resistance of finished wire and cable shall meet the
requirements of 6.2.
Fire-resistant optical fiber cable shall meet the requirements of fire resistance of the optical
fiber cable in 6.2.
Fire-resistant wire and cable or optical fiber cable products shall be flame retardant; and the
flame retardance shall meet the corresponding requirements of 6.1. Halogen-free, low smoke
products shall also meet the requirements of 6.3 and 6.4. Halogen-free, low smoke, low toxicity
products shall also meet the requirements of 6.3, 6.4 and 6.5.
The refractory layer of fire-resistant wire and cable or optical fiber cable shall lead to an
increase in external dimensions; the assessment indicators of external size shall be corrected in
accordance with the requirements of Clause 4.
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. When the supplier and the
purchaser accept the products, they shall determine a reasonable sampling program, if necessary,
the corresponding combustion performance sampling test shall be carried out.
Appendix C
(Normative)
Toxicity Indicator Test Method
C.1 General
Toxicity indicator test is applicable to non-metallic materials taken from halogen-free, low
smoke, low toxicity wire and cable or optical fiber cable. When appropriate, the non-metallic
raw materials of halogen-free, low smoke, and low toxicity wire and cable or optical fiber cable
are applicable.
Low toxicity materials shall meet the requirements of halogen-free performance. Preliminary
qualitative analysis can be performed to determine if nitrogen and sulfur are present. If
confirmed the presence of nitrogen and sulfur, then take the subsequent quantitative analysis
on SO2, NOx and HCN. If confirmed that there is no nitrogen and sulfur, then do not take the
subsequent quantitative analysis on SO2, NOx and HCN.
C.2 Take the qualitative analysis on nitrogen and sulfur by using molten sodium
C.2.1 Preparation of test solutions
Warnings -- The operator shall take precautions to avoid jetting and bursting, shattering
of the test tube, and dissolution of soluble material.
Put about 0.1g of the test sample cut into fine particles together with a grain of sodium metal
into a test tube; heat until red; and then put the test tube into a beaker with 10 mL of water for
cooling. The formed product shall be filtered to obtain a clean solution and divided into two
equal portions.
C.2.2 Determination
C.2.2.1 Determination of nitrogen
In one of the above original solutions, add a small amount of 10% concentration of ferrous
sulfide solution. If the sulfur is present, then form the black iron sulfide. If there is no sulfur,
then form the dark green ferrous hydroxide. Boil the formed product; add a small amount of
ferric chloride solution; drop the hydrochloric acid to make it acidification; if there is the blue
ferrous cyanide mixture formed, which indicates the presence of nitrogen.
C.2.2.2 Determination of sulfur
Add a few drops of sodium nitrate solution with a concentration of about 1% to another above
original solution, if it appears a dark purple color, which indicates the presence of sulfur.
NOTE: The detection limit of this method is 0.1%.
C.3 Quantitative analysis (discontinuity analysis method)
C.3.1 Principle of the method
Put the material specimen into a test tube; and a stream of air is passed the test tube over the
specimen to maintain its combustion; and then analyze the released material.
NOTE: Because the continuity analysis method cannot analyze the nitrogen oxides, only the
discontinuity analysis method is specified here.
C.3.2 Test apparatus
The test apparatus (see Figure C.1), including the air bag with volume of 40 dm3.
C.3.3 Specimen and pretreatment
Take approximately 1g of specimen from the relevant wire and cable or optical fiber cable
insulation or sheathing (or other non-metallic materials need to be tested). The specimen shall
be placed for at least 48h at (23±2) °C and a relative humidity of (50±5) %.
C.3.4 Combustion process
Warnings – The operators shall take precautions, such as wearing goggles and
appropriate protective clothing; because some materials burn rapidly and can cause
"backflow" of hot gases. Care shall also be taken to avoid over-pressurization of the
system and to use appropriate measures to vent exhaust gases.
Place the specimen in a pre-weighed combustion boat, accurate sample mass to 0.001 g. The
tube furnace is operated at (800±10) °C. When starting the test, start the compressed air blower;
immediately put the combustion boat and the specimen into the central part of the combustion
tube; and use the temperature detector to monitor the temperature during the whole test.
The air flow was adjusted by a needle valve to ensure a flowrate of approximately 33 cm3/s;
and continuous bubble generation was observed in the gas wash bottle.
The high temperature pyrolysis or combustion lasts for 20 min and the gases emitted from the
combustion tube are purified by a filter. Then then the categories of gas produced by the
combustion of the material is analyzed by using a specific method.
Even if the combustion or high temperature pyrolysis is not finished, the combustion boat shall
be taken out of the combustion tube. Use 40 dm3 of air to drive out the released gases. At the
end of the test, use 80 dm3 of air to remove the released gases from the combustion tube.
......
GB/T 19666-2005
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.060.20
K 13
Flame retardant and fire resistant wires and cables
ISSUED ON. FEBRUARY 6, 2005
IMPLEMENTED ON. AUGUST 1, 2005
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Content
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and definitions ... 6
4 Type ... 6
5 Combustion characteristic requirements ... 10
6 Technical requirements ... 12
7 Acceptance rules ... 14
Annex A (Informative) Example of relevant wire and cable products ... 15
Annex B (Informative) Halogen free low smoke flame retardance
insulation and sheath technical performance ... 16
Annex C (Informative) Technical performance of fire resistant mica tape
for wires and cables ... 18
Foreword
Flame retardant and fire resistant wires and cables, including halogen,
halogen-free, low smoke and other products, have been produced and used in
China for more than ten years, and play an important role in fire safety.
However, as there is no international standard nor national standard, therefore,
there is no unified product names, models, technical requirements, test
methods, etc.; and some are even inconsistent with international requirements.
This Standard is developed so as to unify the domestic production and
application, and meet the needs of international trade and exchange on
economy and technology.
Considering that the flame retardance, fire resistance and other requirements
cover almost all of wire and cable products, it generally does not need to
change the structure of wire or cable but the materials used to achieve this
objective. Therefore, it does not develop product standards one by one.
Instead, this General Rule is made to specify the requirements on flame
retardance, fire resistance and other combustion characteristics which are
different from the existing ordinary product standards. It recommends the
flame retardant and fire resistant materials that may be adopted. And relevant
marks are added in front of the common product model, so as to distinguish it
from ordinary products.
In this Standard, all test methods and performance requirements on
halogen-free, low smoke, flame retardant and fire resistant characteristics use
the following latest international standards.
IEC 60331.1999 Circuit integrity test of cable or optical cable under flame
conditions
IEC 60332.2000 Burning test of cable or optical cable under flame
conditions
IEC 60754.1997 Test methods for the release of gases in the burning of the
materials from cable or optical cable
IEC 61034.1997 Measurement of burning smoke density of cable or optical
cable under specified conditions
This General Rule shall be used as product standard. For the compilation of
individual-series product standard, the relevant content must comply with the
provisions of this General Rule.
In this Standard, Annex A, Annex B and Annex C are informative.
Flame retardant and fire resistant wires and cables
1 Scope
This Standard specifies the models, technical requirements, test methods and
acceptance criteria for flame retardant and fire resistant wires and cables,
including halogen-containing, halogen free, low smoke and other
characteristics. This Standard applies to the halogen, halogen free and low
smoke flame retardant and fire resistant wires and cables.
2 Normative References
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 17650.2-1998 Test on gases evolved during combustion of materials
from cables - Part 2. Determination of degree of acidity of gases by
measuring pH and conductivity (idt IEC 60754-2.1991)
GB/T 17651.2-1998 Measurement of smoke density of cables burning
under defined conditions - Part 2. Test procedure and requirements (idt
IEC61034-2.1997)
GB/T 18380.1-2001 Tests on electric cables under fire conditions - Part 1.
Test on a single vertical insulated wire or cable (idt IEC 60332-1.1993)
GB/T 18380.2-2001 Tests on electric cables under fire conditions - Part 2.
Test on a single small vertical insulated copper wire or cable (idt IEC
60332-2.1989)
GB/T 18380.3-2001 Tests on electric cables under fire conditions - Part 3.
Tests on bunched wires or cables (idt IEC60332-3.1992)
GB/T 19216.21-2003 Tests for electric cables under fire conditions - Circuit
integrity - Part 21. Procedures and requirements - Cable of rated voltage up
to and including 0.6/1.0 kV (idt IEC 60331-21.1999)
GB/T 19216.23-2003 Tests for electric cables under fire conditions - Circuit
integrity - Part 23. Procedures and requirements - Electric data cables (idt
IEC 60331-23.1999)
IEC 60332-3-25.2000 Tests on electric cables under fire conditions - Part 25.
Test for vertical flame spread of vertically-mounted bunched wires or cables
- Category D
3 Terms and definitions
3.1 Flame retardance
It refers to the characteristics of flame spreading above the sample only in
limited range and extinguishing by itself when the sample is burned and fire
source is removed under specified test conditions, i.e. the ability to prevent or
delay occurrence or spreading of flame.
3.2 Fire resistance
The ability to continuously run under a specified condition when burning under
the prescribed fire and at prescribed time, i.e. the ability to maintain the
integrity of the circuit.
3.3 Halogen free
Not containing halogen, the corrosivity of combustion products is weak.
3.4 Low smoke
It produces less smoke when it is burning, namely, the light transmittance
(visibility) is higher.
4 Type
4.1 Composition of types
The model of flame retardant and fire resistant wire and cable is composed of
the product combustion characteristics code and the relevant wire and cable
model, as shown in Figure 1.
Relevant wires and cables models
Product combustion characteristic codes
Figure 1 Model composition of flame retardant and fire resistant wires and cables
Y - Polyethylene or polyolefin insulation or sheath;
YJ - Cross-linked polyethylene or cross-linked polyolefin insulation or
sheath;
3 - Polyethylene or polyolefin external sheath;
4 - Cross-linked polyethylene or flexible external sheath;
6 - Non-magnetic metal band armored;
7 - Non-magnetic metal wire armored;
4.4 Product representation method
The product is represented by "Model, specification and standard number /
relevant product standard number". Refer to Annex A for the relevant product
standards.
Example 1. Polyvinyl chloride insulated polyvinyl chloride sheath Category A
flame retardance power cable is.
ZA-W Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 2. Cross linked polyethylene insulated polyvinyl chloride sheath
Category B flame retardance power cable is.
ZB-YJV Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 3. Cross linked polyethylene insulated polyvinyl chloride sheath
Category C flame retardance power cable is.
ZCN-YJV Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 4. Cross-linked polyethylene insulated polyolefin sheath halogen free
low smoke Category B flame retardance power cable is.
WDZB-YJY Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 5. Polyvinyl chloride insulated Category D flame retardance wires for
fixed wiring is.
ZD-BV Specification (omitted) GB/T 19666-2005/GB
5023.3-1997
Table 4 Group flame retardance performance requirements
Code
Volume of
non-metallic material
of sample (L/m)
Fire
provision
time s
Qualification standard Test methods
ZA 7 40 1) Charring length on the sample shall
not exceed 2.5m from the bottom of
the nozzle;
2) After the fire is stopped, flaming time
for sample shall not exceed 1h.
GB/T 18380.3
IEC 60332-3-25
ZB 3.5 40
ZC 1.5 20
ZDa 0.5 20
a ZD applies to wires and cables of which the outside diameter of sample is not more than 12mm.
5.2 Fire resistance performance requirements
Fire resistance performance must comply with the requirements in Table 5.
Table 5 Fire resistance performance requirements
Code Application scope
Fire-supplying
time + cooling
time /min
Test
voltage /V
Qualification
standard
Test
methods
0.6/1kV-and-
below cable 90+15
Rated
value
1) 2A fuse does not
burn;
2) LEDs do not turn
off
GB/T
19216.21
Data cable 90+15
Relevant
to earth.
110±10
1) 2A fuse does
not burn;
2) LEDs do not
turn off
GB/T
19216.23
Notes. supplying temperature is .
5.3 Halogen free p...
......
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