Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
Flame-retardant and fire-resistant wires and cables, including halogen-containing, halogen-free, low-smoke ones, have been produced and used for more than ten years in China and are of far reaching importance to fire safety. However, on account of lack of international standards and national standards, the products are in chaos in terms of name, model, technical requirements, test methods etc., some of which are also inconsistent with international requirements. This standard is formulated to unify domestic manufacturing and application and meets the requirements of international trade and economic & technical interchange.
Provided that almost all electrical wires and cables are required to be flame-retardant and fire-resistant, in general, the materials adopted need to be changed instead of the structure of wires and cables to achieve this goal. Therefore, this standard is formulated instead of formulation of product standards one by one, in which combustion characteristics requirements (flame retardance and fire resistance etc.) different from current common product standards are specified, available flame-retardant or fire-resistant materials are recommended, and corresponding marks are added before common product models to make distinction from common products.
In this standard, test methods and performance requirements for relevant halogen free, low smoke, flame retardance and fire resistance characteristics are all in accordance with latest editions of the following international standards:
IEC 60331: 1999 Tests for Electric Cables under Fire Conditions - Circuit Integrity
IEC 60332: 2000 Tests on Electric and Optical Fibre Cables under Fire Conditions
IEC 60754: 1997 Tests on Gases Evolved during Combustion of Electrical Cables
IEC 61034: 1997 Determination of Smoke Density for Combustion of Electrical Cables under Specified Conditions
This standard may be used as product standard directly. In case the standards for single-series products are required to be prepared, relevant contents must be in accordance with those specified in this standard.
Appendixes A, B and C of this standard are informative.
This standard is a national standard formulated for the first time.
This standard is proposed by China Electrical Equipment Industrial Association.
This standard is under the jurisdiction of National Technical Committee on Wire and Cables of Standardization Administration of China.
Drafting organization of this standard: Shanghai Electric Cable Research Institute.
Participating drafting organizations of this standard: Tianjin Fire Research Institute of Ministry of Public Security, East China Architectural Design & Research Institute Co., Ltd., Yangzhou Shuguang Cable Factory, Shanghai Maqiao Cable Factory, Baosheng Science and Technology Innovation Co., Ltd., Jiangsu Shangshang Cable Group Co., Ltd., Hengtong Group Co., Ltd., Far East Cable Factory, Jiangsu Samson Cable Co., Ltd., Foshan Zhongbao Cable Factory, Shanghai Cable Works Shifen Factory, Huaian Bafang Cable Factory, Wuxi El Pont Polymer Co.,Ltd.
Drafting staff of this standard: Xu Yinglin, Dai Dianfeng, Shen Yuxiang, Gu Liyun, Zhou Yan, Tang Chongjian, Wang Songming, Liu Genrong, Wang Chuanbin, Sun Ping, Luo Pinguang, Zhang Zhiqing, Sun Yueming, You Yong.
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
中华人民共和国国家标准
GB/T 19666-2005
Flame Retardant and Fire Resistant Wires and Cables
阻燃和耐火电线电缆通则
1 Scope
This standard specifies the models, technical requirements, test methods and acceptance rules regarding flame retardant and fire resistant wires and cables which are halogen-containing, halogen-free and low-smoke.
This standard is applicable to halogen-containing, halogen-free and low-smoke flame retardant and fire resistant wires and cables.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigendum), or revisions of, any of these publications do not apply. However, all parties coming to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
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 IEC 61034-2: 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: Test on Bunched Wire or Cable (idt IEC 60332-3: 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 0.6/1.0kV (idt IEC 60331-21: 1999)
GB/T 19216.23-2003 Tests for Electric Cables under Fire Conditions - Circuit Integrity - Procedures and Requirements - Electric Data Cables (idt IEC 60331-23: 1999)
IEC 60332-3-25: 2000 Tests on Electric and Optical Fiber Cables under Fire Conditions - Part 25: Test for Flame Spread of Bunched Wires or Cables - Category D
3 Terms and Definitions
3.1
Flame retardance
The characteristic that flame spreads on the sample within limited scope and extinguishes by itself in case the sample is burned under specified test condition and the fire source is removed, i.e. the capacity to retard occurrence or spreading of the flame.
3.2
Fire resistance
The capacity to keep continuous operation under specified state in case of being burned under specified fire source and time, i.e. the capacity to maintain integrity of the line.
3.3
Halogen free
Free from halogen, relatively low corrosivity of combustion products.
3.4
Low smoke
Less smoke dust generated in case of being burned, namely relatively high light transmittance (visibility).
4 Models
4.1 Composition of model
The models of flame retardant and fire resistant wires and cables are composed of two parts: codes for combustion characteristics of products and models of relevant wires and cables, see Figure 1.
Figure 1 Composition of Models of Flame Retardant and Fire Resistant Wires and Cables
4.2 Codes and sequential arrangement of combustion characteristics
4.2.1 See Table 1 for codes of combustion characteristics.
Table 1 Codes of Combustion Characteristics
Code Designation
Za
ZA
ZB
ZC
ZDb
Omitted
W
D
U
N
NJ
NS Flame retardance
Category A flame retardance
Category B flame retardance
Category C flame retardance
Category D flame retardance
Halogen containing
Halogen free
Low smoke
Low toxicity
Fire resistance
Fire resistance + impact
Fire resistance + water jet
a Z represents single flame retardance, only used for products with halogen free base materials. For those with halogen containing base materials, Z is omitted.
b ZD represents Category D bunched flame retardance, is applicable to the relatively thin products with the outside diameter ≤ 12mm.
4.2.2 See Table 2 for the current codes for combustion characteristics of products. Where various combustion characteristics are required, their codes are arranged in the sequence of halogen free (halogen containing is omitted), low smoke, low toxicity, flame retardance or fire resistance.
Table 2 Current Codes for Combustion Characteristics of Products
Series designation Code Designation
Flame retardance series Halogen containing ZA
ZB
ZC
ZD Category A flame retardance
Category B flame retardance
Category C flame retardance
Category D flame retardance
Halogen free, low smoke WDZ
WDZA
WDZB
WDZC
WDZD Halogen free, low smoke, flame retardance
Category A halogen free, low smoke, flame retardance
Category B halogen free, low smoke, flame retardance
Category C halogen free, low smoke, flame retardance
Category D halogen free, low smoke, flame retardance
Fire resistance series Halogen containing N
ZAN
ZBN
ZCN
ZDN Fire resistance
Category A flame retardance, fire resistance
Category B flame retardance, fire resistance
Category C flame retardance, fire resistance
Category D flame retardance, fire resistance
Halogen free, low smoke WDZN
WDZAN
WDZBN
WDZCN
WDZDN Halogen free, low smoke, flame retardance, fire resistance
Category A halogen free, low smoke, flame retardance and fire resistance
Category B halogen free, low smoke, flame retardance and fire resistance
Category C halogen free, low smoke, flame retardance and fire resistance
Category D halogen free, low smoke, flame retardance and fire resistance
Note: Other codes are under consideration.
4.3 Models of wires and cables
Models of wires and cables are generally composed of series codes, material codes as well as operating characteristics and structure characteristics. Models of relevant wires and cables are directly adopted in this standard. However, meaning of the following codes is expanded as follows:
Y——Polyethylene or polyolefin insulation or sheath;
YJ——Cross-linked polyethylene or cross-linked polyolefin insulation or sheath;
3——Polyethylene or polyolefin outer sheath;
4——Cross-linked polyethylene or elastomer outer sheath;
6——Nonmagnetic metal tape armour;
7——Nonmagnetic metal wire armour.
4.4 Expression method of products
The products are expressed with "model, specification and serial number of this standard / relevant product standards". See Appendix A for relevant product standards.
Example 1: Category A flame-retardant power cable with polyvinyl chloride insulation and polyvinyl chloride sheath is expressed as:
Example 3: Category C flame-retardant and fire-resistant power cable with cross-linked polyethylene insulation and polyvinyl chloride sheath is expressed as:
Example 4: halogen-free, low-smoke and Category B flame-retardant power cable with cross-linked polyethylene insulation and polyolefin sheath is expressed as:
Example 7: Category A flame-retardant control cable with polyvinyl chloride insulation and steel tape armoring polyvinyl chloride sheath is expressed as:
Example 8: halogen-free, low-smoke and Category B flame-retardant local communication cable with polyolefin insulation, filled moisture-proof layer polyolefin sheath and single-layer vertically wrapped and rolled steel tape armoring polyolefin coat is expressed as:
Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Models 5 Combustion Characteristics Requirements 6 Technical Requirements 7 Acceptance Rules Appendix A (Informative) Examples of Relevant Standards for Wires and Cables Appendix B (Informative) Technical Performance of Halogen-free Low-smoke Flame Retardant Insulation and Sheath Appendix C (Informative) Technical Performance of Fire Resistant Mica Tape for Wires and Cables
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
Flame-retardant and fire-resistant wires and cables, including halogen-containing, halogen-free, low-smoke ones, have been produced and used for more than ten years in China and are of far reaching importance to fire safety. However, on account of lack of international standards and national standards, the products are in chaos in terms of name, model, technical requirements, test methods etc., some of which are also inconsistent with international requirements. This standard is formulated to unify domestic manufacturing and application and meets the requirements of international trade and economic & technical interchange.
Provided that almost all electrical wires and cables are required to be flame-retardant and fire-resistant, in general, the materials adopted need to be changed instead of the structure of wires and cables to achieve this goal. Therefore, this standard is formulated instead of formulation of product standards one by one, in which combustion characteristics requirements (flame retardance and fire resistance etc.) different from current common product standards are specified, available flame-retardant or fire-resistant materials are recommended, and corresponding marks are added before common product models to make distinction from common products.
In this standard, test methods and performance requirements for relevant halogen free, low smoke, flame retardance and fire resistance characteristics are all in accordance with latest editions of the following international standards:
IEC 60331: 1999 Tests for Electric Cables under Fire Conditions - Circuit Integrity
IEC 60332: 2000 Tests on Electric and Optical Fibre Cables under Fire Conditions
IEC 60754: 1997 Tests on Gases Evolved during Combustion of Electrical Cables
IEC 61034: 1997 Determination of Smoke Density for Combustion of Electrical Cables under Specified Conditions
This standard may be used as product standard directly. In case the standards for single-series products are required to be prepared, relevant contents must be in accordance with those specified in this standard.
Appendixes A, B and C of this standard are informative.
This standard is a national standard formulated for the first time.
This standard is proposed by China Electrical Equipment Industrial Association.
This standard is under the jurisdiction of National Technical Committee on Wire and Cables of Standardization Administration of China.
Drafting organization of this standard: Shanghai Electric Cable Research Institute.
Participating drafting organizations of this standard: Tianjin Fire Research Institute of Ministry of Public Security, East China Architectural Design & Research Institute Co., Ltd., Yangzhou Shuguang Cable Factory, Shanghai Maqiao Cable Factory, Baosheng Science and Technology Innovation Co., Ltd., Jiangsu Shangshang Cable Group Co., Ltd., Hengtong Group Co., Ltd., Far East Cable Factory, Jiangsu Samson Cable Co., Ltd., Foshan Zhongbao Cable Factory, Shanghai Cable Works Shifen Factory, Huaian Bafang Cable Factory, Wuxi El Pont Polymer Co.,Ltd.
Drafting staff of this standard: Xu Yinglin, Dai Dianfeng, Shen Yuxiang, Gu Liyun, Zhou Yan, Tang Chongjian, Wang Songming, Liu Genrong, Wang Chuanbin, Sun Ping, Luo Pinguang, Zhang Zhiqing, Sun Yueming, You Yong.
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
中华人民共和国国家标准
GB/T 19666-2005
Flame Retardant and Fire Resistant Wires and Cables
阻燃和耐火电线电缆通则
1 Scope
This standard specifies the models, technical requirements, test methods and acceptance rules regarding flame retardant and fire resistant wires and cables which are halogen-containing, halogen-free and low-smoke.
This standard is applicable to halogen-containing, halogen-free and low-smoke flame retardant and fire resistant wires and cables.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigendum), or revisions of, any of these publications do not apply. However, all parties coming to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
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 IEC 61034-2: 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: Test on Bunched Wire or Cable (idt IEC 60332-3: 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 0.6/1.0kV (idt IEC 60331-21: 1999)
GB/T 19216.23-2003 Tests for Electric Cables under Fire Conditions - Circuit Integrity - Procedures and Requirements - Electric Data Cables (idt IEC 60331-23: 1999)
IEC 60332-3-25: 2000 Tests on Electric and Optical Fiber Cables under Fire Conditions - Part 25: Test for Flame Spread of Bunched Wires or Cables - Category D
3 Terms and Definitions
3.1
Flame retardance
The characteristic that flame spreads on the sample within limited scope and extinguishes by itself in case the sample is burned under specified test condition and the fire source is removed, i.e. the capacity to retard occurrence or spreading of the flame.
3.2
Fire resistance
The capacity to keep continuous operation under specified state in case of being burned under specified fire source and time, i.e. the capacity to maintain integrity of the line.
3.3
Halogen free
Free from halogen, relatively low corrosivity of combustion products.
3.4
Low smoke
Less smoke dust generated in case of being burned, namely relatively high light transmittance (visibility).
4 Models
4.1 Composition of model
The models of flame retardant and fire resistant wires and cables are composed of two parts: codes for combustion characteristics of products and models of relevant wires and cables, see Figure 1.
Figure 1 Composition of Models of Flame Retardant and Fire Resistant Wires and Cables
4.2 Codes and sequential arrangement of combustion characteristics
4.2.1 See Table 1 for codes of combustion characteristics.
Table 1 Codes of Combustion Characteristics
Code Designation
Za
ZA
ZB
ZC
ZDb
Omitted
W
D
U
N
NJ
NS Flame retardance
Category A flame retardance
Category B flame retardance
Category C flame retardance
Category D flame retardance
Halogen containing
Halogen free
Low smoke
Low toxicity
Fire resistance
Fire resistance + impact
Fire resistance + water jet
a Z represents single flame retardance, only used for products with halogen free base materials. For those with halogen containing base materials, Z is omitted.
b ZD represents Category D bunched flame retardance, is applicable to the relatively thin products with the outside diameter ≤ 12mm.
4.2.2 See Table 2 for the current codes for combustion characteristics of products. Where various combustion characteristics are required, their codes are arranged in the sequence of halogen free (halogen containing is omitted), low smoke, low toxicity, flame retardance or fire resistance.
Table 2 Current Codes for Combustion Characteristics of Products
Series designation Code Designation
Flame retardance series Halogen containing ZA
ZB
ZC
ZD Category A flame retardance
Category B flame retardance
Category C flame retardance
Category D flame retardance
Halogen free, low smoke WDZ
WDZA
WDZB
WDZC
WDZD Halogen free, low smoke, flame retardance
Category A halogen free, low smoke, flame retardance
Category B halogen free, low smoke, flame retardance
Category C halogen free, low smoke, flame retardance
Category D halogen free, low smoke, flame retardance
Fire resistance series Halogen containing N
ZAN
ZBN
ZCN
ZDN Fire resistance
Category A flame retardance, fire resistance
Category B flame retardance, fire resistance
Category C flame retardance, fire resistance
Category D flame retardance, fire resistance
Halogen free, low smoke WDZN
WDZAN
WDZBN
WDZCN
WDZDN Halogen free, low smoke, flame retardance, fire resistance
Category A halogen free, low smoke, flame retardance and fire resistance
Category B halogen free, low smoke, flame retardance and fire resistance
Category C halogen free, low smoke, flame retardance and fire resistance
Category D halogen free, low smoke, flame retardance and fire resistance
Note: Other codes are under consideration.
4.3 Models of wires and cables
Models of wires and cables are generally composed of series codes, material codes as well as operating characteristics and structure characteristics. Models of relevant wires and cables are directly adopted in this standard. However, meaning of the following codes is expanded as follows:
Y——Polyethylene or polyolefin insulation or sheath;
YJ——Cross-linked polyethylene or cross-linked polyolefin insulation or sheath;
3——Polyethylene or polyolefin outer sheath;
4——Cross-linked polyethylene or elastomer outer sheath;
6——Nonmagnetic metal tape armour;
7——Nonmagnetic metal wire armour.
4.4 Expression method of products
The products are expressed with "model, specification and serial number of this standard / relevant product standards". See Appendix A for relevant product standards.
Example 1: Category A flame-retardant power cable with polyvinyl chloride insulation and polyvinyl chloride sheath is expressed as:
ZA-VV Specification (omitted) GB/T 19666-2005/GB/T 12706.1-2002
Example 2: Category B flame-retardant power cable with cross-linked polyethylene insulation and polyvinyl chloride sheath is expressed as:
ZB-YJV Specification (omitted) GB/T 19666-2005/GB/T 12706.1-2002
Example 3: Category C flame-retardant and fire-resistant power cable with cross-linked polyethylene insulation and polyvinyl chloride sheath is expressed as:
ZCN-YJV Specification (omitted) GB/T 19666-2005/GB/T 12706.1-2002
Example 4: halogen-free, low-smoke and Category B flame-retardant power cable with cross-linked polyethylene insulation and polyolefin sheath is expressed as:
WDZB-YJY Specification (omitted) GB/T 19666-2005/GB/T 12706.1-2002
Example 5: Category D flame retardant wires with polyvinyl chloride insulation for fixed wiring is expressed as:
ZD-BV Specification (omitted) GB/T 19666-2005/GB 5023.3-1997
Example 6: Category C flame-retardant cable with polyvinyl chloride insulation and light polyvinyl chloride sheath is expressed as:
ZC-BVV Specification (omitted) GB/T 19666-2005/GB 5023.4-1997
Example 7: Category A flame-retardant control cable with polyvinyl chloride insulation and steel tape armoring polyvinyl chloride sheath is expressed as:
ZA-KVV22 Specification (omitted) GB/T 19666-2005/GB 9330-1988
Example 8: halogen-free, low-smoke and Category B flame-retardant local communication cable with polyolefin insulation, filled moisture-proof layer polyolefin sheath and single-layer vertically wrapped and rolled steel tape armoring polyolefin coat is expressed as:
WDZB-HYAT53 Specification (omitted) GB/T 19666-2005/GB/T 13849.2-1993
Contents of GB/T 19666-2005
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Models
5 Combustion Characteristics Requirements
6 Technical Requirements
7 Acceptance Rules
Appendix A (Informative) Examples of Relevant Standards for Wires and Cables
Appendix B (Informative) Technical Performance of Halogen-free Low-smoke Flame Retardant Insulation and Sheath
Appendix C (Informative) Technical Performance of Fire Resistant Mica Tape for Wires and Cables
