标准编号:	GB/T 19666-2019
中文名称:	阻燃和耐火电线电缆或光缆通则
英文名称:	General rules for flame retardant and fire resistant electric wires and cables or optical fiber cables
中标分类:	K13    电缆及其附件
行业分类:	GB    国家标准
ICS分类:	29.060.20 29.060.20    电缆 29.060.20
发布机构:	中华人民共和国国家市场监督管理总局 中国国家标准化管理委员会
发布日期:	2019-12-10
实施日期:	2020-7-1
标准状态:	valid
替代旧标准:	GB/T 19666-2005 阻燃和耐火电线电缆通则
翻译语言:	英文
文件格式:	PDF
中文字符数:	21000 字
翻译价格(元):	1350.0
交付时间:	付款后 1 个工作日

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. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 19666-2005 Flame retardant and fire resistant wires and cables — General. The following main technical changes have been made with respect to GB/T 19666-2005: ——Optical fiber cables have been added to the application scope (see Clause 1); ——The definition of "low toxicity" has been added (see 3.5); ——The clause "General" has been added (see Clause 4); ——The designation of codes N, NJ and NS have been modified (See Table 1; Table 1 in 2009 Edition); ——The combinations of burning behavior codes of halogen-free, low-smoke and low-toxicity flame retardant series and fire resistant series have been added (see 5.1.2); ——The assessment indicator and test method of flaming droplets have been added (see Table 4); ——The acceptance criteria that "the flaming burning time on the sample shall not exceed 1h after removing fire" has been deleted (see Table 4 of 2005 Edition); ——The acceptance criteria and test method of NJ and NS have been added (see Table 6); ——The acceptance criteria and test method of halogen acid gas release volume and halogen content in halogen-free properties have been added (see Table 7); ——The pH and conductivity weighted values for halogen-free properties have been modified (see Table 7; Table 6 of 2005 Edition); ——The note "The minimum light transmittance test results of electric wires and cables or optical fiber cables with an outer diameter greater than 80 mm shall be multiplied by a factor (d/80) as the final conclusion" has been added (see Table 8). ——The acceptance criteria and test method of low toxicity have been added (see 6.5); ——The technical requirements for halogen-free, low-smoke and low-toxicity flame retardant electric wires and cables and optical fiber cables have been added (see 7.1.3); ——"The properties of fire resistant mica tape may refer to Annex C to this standard" has been deleted. If the fire resistant layer is between conductor and insulator, the thickness of insulation layer may be reduced, but the thickness after reduction shall not be less than 80% of the original standard thickness "(see 6.4 of 2005 Edition); ——The nature and contents of Annex A have been modified (see Annex A; Annex A to 2005 Edition); ——The nature and contents of Annex B have been modified (see Annex B; Annex B to 2005 Edition); ——The nature and contents of Annex C have been modified (see Annex C; Annex C to 2005 Edition). This standard was proposed by China Electrical Equipment Industry Association. This standard is under the jurisdiction of National Technical Committee on Wires and Cables of Standardization Administration of China (SAC/TC 213). The previous edition of this standard is as follows: ——GB/T 19666-2005. General rules for flame retardant and fire resistant electric wires and cables or optical fiber cables 1 Scope This standard specifies the burning behavior code, technical requirements, test methods and acceptance rules of flame retardant and fire resistant electric wires and cables or optical fiber cables, including the burning behavior of halogen-free, low smoke, low toxicity, flame retardance and fire resistance. This standard is applicable to flame retardant and fire resistant electric wires and cables or optical fiber cables containing halogen, halogen-free or with low smoke or low toxicity. 2 Normative references The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. 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 burning under defined conditions — Part 2: Test procedure and requirements GB/T 18380.12 Tests 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 1 kW pre-mixed flame GB/T 18380.13 Tests on electric and optical fibre 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 fibre 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 fibre cables under fire conditions — Part 33: Test for vertical flame spread of vertically-mounted bunched wires or cables — Category A GB/T 18380.34 Tests on electric and optical fibre cables under fire conditions — Part 34: Test for vertical flame spread of vertically-mounted bunched wires or cables — Category B GB/T 18380.35 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 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 D GB/T 19216.21 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 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 fibre 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 0,6/1,0 kV and with an overall diameter exceeding 20 mm 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 0,6/1,0 kV and with an overall diameter not exceeding 20 mm IEC 60684-2:2011 Flexible insulating 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 purpose of this document, the following terms and definitions apply. 3.1 flame retardance burning behavior that after a sample is burned under the specified conditions, the flame spread on the sample only within a limited range after the fire source is removed, i.e., burning behavior of a sample to prevent or delay the occurrence or spread of flame 3.2 fire resistance burning behavior that a sample can operate continuously under specified conditions when it is burned on a specified fire source and in specific period 3.3 halogen free burning behavior that the content of halogen (fluorine, chlorine, bromine and iodine) in the gases released from burning is less than or equal to 1.0 mg/g 3.4 low smoke burning behavior that the concentration of smoke from burning will not reduce visibility (light transmittance) to the degree adversary to escape 3.5 low toxicity burning behavior that the toxicity and concentration of toxic smoke from burning will not cause the death of living organisms within 30 min 4 General The burning behavior of flame retardant and fire resistant electric wires and cables or optical fiber cables shall meet the requirements of this standard, and properties other than burning ones shall meet the relevant product standards. Electric wires and cables or optical fiber cables may reduce their original basic properties while achieving the purpose of flame retardance and/or fire resistance, or make some original test methods inapplicable. The parties to agreements based on this standard shall discuss or negotiate an appropriate solution, which shall ensure the safety and reliability of electric wires and cables or optical fiber cables during use while achieving the purpose of flame retardance and/or fire resistance. On the premise of not compromising the safety and reliability during use, the corresponding technical indicators or test methods may be properly adjusted. 5 Product designation 5.1 Burning behavior codes and combinations 5.1.1 Burning behavior codes See Table 1 for the burning behavior codes.   Table 1 Burning behavior codes Code Designation Z a Single flame retardance ZA b Category A flame retardance ZB Category B flame retardance ZC Category C flame retardance ZD Category D flame retardance Halogen-containing W Halogen-free D Low smoke U Low toxicity N Resistance to fire only NJ Resistance to fire with shock NS Resistance to fire with shock and water jet a For halogen-containing products, "Z" is omitted. b This is only applicable to Category A of GB/T 18380.33, excluding Category AF/R of GB/T 18380.32. 5.1.2 Combination of burning behavior codes See Table 2 for the combination of burning behavior codes for flame retardant series, and Table 3 for the combination of burning behavior codes for fire resistant series. When there are requirements for various burning behavior, the codes are arranged and combined in the order of halogen-free (the code for halogen-containing is omitted), low smoke, low toxicity, flame retardance and fire resistance.   Table 2 Combination of burning behavior codes for flame retardant series Series Code Designation Flame retardant series Halogen-containing ZA Category A flame retardance ZB Category B flame retardance ZC Category C flame retardance ZD Category D flame retardance Halogen-free and low-smoke WDZ Halogen-free low smoke and flame retardance of single cable WDZA Halogen-free, low smoke and Category A flame retardance WDZB Halogen-free, low smoke and Category B flame retardance WDZC Halogen-free, low smoke and Category C flame retardance WDZD Halogen-free low smoke and Category D flame retardance Halogen-free, low smoke and low toxicity a WDUZ Halogen-free, low smoke, low toxicity and flame retardance of single cable WDUZA Halogen-free, low smoke, low toxicity and Category A flame retardance WDUZB Halogen-free, low smoke, low toxicity and Category B flame retardance WDUZC Halogen-free, low smoke, low toxicity and Category C flame retardance WDUZD Halogen-free, low smoke, low toxicity and Category D flame retardance a This is optional based on the application occasion of electric wires and cables or optical fiber cables, which may include compacted space or crowded places with relatively closed environment.   Table 3 Combination of burning behavior codes for fire resistant series Series Code Designation Fire resistant series Halogen-containing N, NJ, NS Fire resistance ZAN, ZANJ, ZANS Category A flame retardance and fire resistance ZBN, ZBNJ, ZBNS Category B flame retardance and fire resistance ZCN, ZCNJ, ZCNS Category C flame retardance and fire resistance ZDN, ZDNJ, ZDNS Category D flame retardance and fire resistance Halogen-free and low smoke WDZN, WDZNJ, WDZNS Halogen-free, low smoke, flame retardance and fire resistance of single cable WDZAN, WDZANJ, WDZANS Halogen-free, low smoke, Category A flame retardance and fire resistance WDZBN, WDZBNJ, WDBZNS Halogen-free, low smoke, Category B flame retardance and fire resistance WDZCN, WDZCNJ, WDZCNS Halogen-free, low smoke, Category C flame retardance and fire resistance WDZDN, WDZDNJ, WDZDNS Halogen-free, low smoke, Category D flame retardance and fire resistance Halogen-free, low smoke and low toxicity a WDUZN, WDUZNJ, WDUZNS Halogen-free, low smoke, low toxicity, flame retardance and fire resistance of single cable WDUZAN, WDUZANJ, WDUZANS Halogen-free, low smoke, low toxicity, Category A flame retardance and fire resistance WDUZBN, WDUZBNJ, WDUBZNS Halogen-free, low smoke, low toxicity, Category B flame retardance and fire resistance WDUZCN, WDUZCNJ, WDUZCNS Halogen-free, low smoke, low toxicity, Category C flame retardance and fire resistance WDUZDN, WDUZDNJ, WDUZDNS Halogen-free, low smoke, low toxicity, Category D flame retardance and fire resistance a This is optional based on the application occasion of electric wires and cables or optical fiber cables, which may include compacted space or crowded places with relatively closed environment. 5.2 Composition of product model The model of flame retardant and fire resistant electric wires and cables or optical fiber cables consist of burning behavior codes and related wire, cable or optical fiber cable models, as shown in Figure 1. Figure 1 Model composition of flame retardant and fire resistant electric wires and cables or optical fiber cables

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 General 5 Product designation 5.1 Burning behavior codes and combinations 5.2 Composition of product model 5.3 Product representation method 6 Requirements of burning behavior 6.1 Flame retardance 6.2 Fire resistance 6.3 Halogen-free property 6.4 Low smoke 6.5 Low toxicity 7 Technical requirements 7.1 Flame retardant electric wire and cable or optical fiber cable series 7.2 Fire-resistant electric wires and cables or optical fiber cable series 8 Acceptance rules Annex A (Normative) Water spray test method Annex B (Normative) Water jet test method Annex C (Normative) Toxicity index test method Bibliography

阻燃和耐火电线电缆或光缆通则 1 范围 本标准规定了阻燃和耐火电线电缆或光缆的燃烧特性代号、技术要求、试验方法和验收规则，包括无卤、低烟、低毒、阻燃和耐火等燃烧特性。 本标准适用于含卤、无卤、低烟、低毒的阻燃和耐火电线电缆或光缆产品。 2 规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。 GB／T 4208—2017 外壳防护等级(IP代码) GB／T 17650.1 取自电缆或光缆的材料燃烧时释出气体的试验方法 第1部分：卤酸气体总量的测定 GB／T 17650.2 取自电缆或光缆的材料燃烧时释出气体的试验方法 第2部分：用测量pH值和电导率来测定气体的酸度 GB／T 17651.2 电缆或光缆在特定条件下燃烧的烟密度测定 第2部分：试验步骤和要求 GB／T 18380.12电缆和光缆在火焰条件下的燃烧试验︰第12部分：单根绝缘电线电缆火焰垂直蔓延试验1 kW预混合型火焰试验方法 GB／T 18380.13 电缆和光缆在火焰条件下的燃烧试验 第13部分：单根绝缘电线电缆火焰垂直蔓延试验 测定燃烧的滴落(物)／微粒的试验方法 GB／T 18380.22 电缆和光缆在火焰条件下的燃烧试验 第22部分：单根绝缘细电线电缆火焰垂直蔓延试验 扩散型火焰试验方法 GB／T 18380.33 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 18380.34 电缆和光缆在火焰条件下的燃烧试验 第34部分：垂直安装的成束电线电缆火焰垂直蔓延试验 B类 GB／T 18380.35 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 18380.36 电缆和光缆在火焰条件下的燃烧试验 第36部分：垂直安装的成束电线电缆火焰垂直蔓延试验 D类 GB／T 19216.21 在火焰条件下电缆或光缆的线路完整性试验 第21部分：试验步骤和要求 额定电压0.6／1.0 kV及以下电缆 GB／T 19216.23 在火焰条件下电缆或光缆的线路完整性试验 第23部分：试验步骤和要求 数据电缆 GB／T 19216.25 在火焰条件下电缆或光缆的线路完整性试验 第25部分：试验步骤和要求 光缆 IEC 60331-1 电缆在火焰条件下的试验 线路完整性 第1部分：火焰温度不低于830℃的供火并施加机械冲击，额定电压0.6／1.0 kV及以下外径大于20 mm电缆的试验方法(Tests for electric cables under fire conditions—Circuit integrity—Part 1：Test method for fire with shock at a temperature of at least 830℃ for cables of rated voltage up to and including 0，6／1，0 kV and with an overall diameter exceeding 20 mm) IEC 60331-2 电缆在火焰条件下的试验线路完整性 第2部分：火焰温度不低于830℃的供火并施加机械冲击，额定电压0.6／1.0 kV及以下外径不大于20 mm电缆的试验方法(Tests for electric cables under fire conditions—Circuit integrity—Part 2：Test method for fire with shock at a temperature of at least 830℃ for cables of rated voltage up to and including 0，6／1，0 kV and with an overall diameter not exceeding 20 mm) IEC 60684-2：2011 可弯曲绝缘导管 第2部分：试验方法(Flexible insulating sleeving—Part 2：Methods of test) IEC 60754-3 取自电缆的材料燃烧过程中释出气体的试验方法 第3部分：用离子色谱法测量低水平卤素含量(Test on gases evolved during combustion of materials from cables—Part 3：Measurement of low level of halogen content by ion chromatography) 3 术语和定义 下列术语和定义适用于本文件。 3.1 阻燃 flame retardance 试样在规定条件下被燃烧，在撤去火源后火焰在试样上的蔓延仅在限定范围内，具有阻止或延缓火焰发生或蔓延能力的特性。 3.2 耐火 fire resistance 试样在规定火源和时间下被燃烧时能持续地在指定条件下运行的特性。 3.3 无卤 halogen free 燃烧时释出气体的卤素(氟、氯、溴、碘)含量均小于或等于1.0 mg／g的特性。 3.4 低烟 low smoke 燃烧时产生的烟雾浓度不会使能见度(透光率)下降到影响逃生的特性。 3.5 低毒 low toxicity 燃烧时产生的毒性烟气的毒效和浓度不会在30 min内使活体生物产生死亡的特性。 4 总则 阻燃和耐火电线电缆或光缆产品的燃烧特性应符合本标准要求，除燃烧特性之外的其他性能应符合相应的产品标准要求。 电线电缆或光缆产品在实现其阻燃和／或耐火目的同时可能会降低其原有的基本特性，或导致原有的某些试验方法不适用。使用本标准的各方应讨论或协商一种合适的方案，在确保电线电缆或光缆产品达到阻燃和／或耐火目的同时应保证使用过程中的安全和可靠，在不降低使用过程中的安全和可靠性前提下可适当调整相应的技术指标或试验方法。 5 产品型号 5.1 燃烧特性代号和组合 5.1.1 燃烧特性代号 燃烧特性代号见表1。 表1 燃烧特性代号 代号 名称 Za 单根阻燃 ZAb 阻燃A类 ZB 阻燃B类 ZC 阻燃C类 ZD 阻燃D类 含卤 W 无卤 D 低烟 U 低毒 N 单纯供火的耐火 NJ 供火加机械冲击的耐火 NS 供火加机械冲击和喷水的耐火 a 含卤产品，Z省略。 b 仅适用于GB／T 18380.33的A类，不包括GB／T 18380.32的AF／R类。 5.1.2 燃烧特性代号组合 阻燃系列燃烧特性代号组合见表2，耐火系列燃烧特性代号组合见表3。有多种燃烧特性要求时，其代号按无卤(含卤省略)低烟、低毒、阻燃和耐火的顺序排列组合。 表2 阻燃系列燃烧特性代号组合 系列名称 代号 名称 阻燃系列 含卤 ZA 阻燃A类 ZB 阻燃B类 ZC 阻燃C类 ZD 阻燃D类 无卤低烟 WDZ 无卤低烟单根阻燃 WDZA 无卤低烟阻燃A类 WDZB 无卤低烟阻燃B类 WDZC 无卤低烟阻燃C类 WDZD 无卤低烟阻燃D类 无卤低烟低毒a WDUZ 无卤低烟低毒单根阻燃 WDUZA 无卤低烟低毒阻燃A类 WDUZB 无卤低烟低毒阻燃B类 WDUZC 无卤低烟低毒阻燃C类 WDUZD 无卤低烟低毒阻燃D类 a 根据电线电缆或光缆使用场合选择使用，可包括空间较小或环境相对密闭的人员密集场所等。 表3 耐火系列燃烧特性代号组合 系列名称 代号 名称 耐火系列 含卤 N、NJ、NS 耐火 ZAN、ZANJ、ZANS 阻燃A类耐火 ZBN、ZBNJ、ZBNS 阻燃B类耐火 ZCN、ZCNJ、ZCNS 阻燃C类耐火 ZDN、ZDNJ、ZDNS 阻燃D类耐火 无卤低烟 WDZN、WDZNJ、WDZNS 无卤低烟单根阻燃耐火 WDZAN、WDZANJ、WDZANS 无卤低烟阻燃A类耐火 WDZBN、WDZBNJ、WDBZNS 无卤低烟阻燃B类耐火 WDZCN、WDZCNJ、WDZCNS 无卤低烟阻燃C类耐火 WDZDN、WDZDNJ、WDZDNS 无卤低烟阻燃D类耐火 无卤低烟低毒a WDUZN、WDUZNJ、WDUZNS 无卤低烟低毒单根阻燃耐火 WDUZAN、WDUZANJ、WDUZANS 无卤低烟低毒阻燃A类耐火 WDUZBN、WDUZBNJ、WDUBZNS 无卤低烟低毒阻燃B类耐火 WDUZCN、WDUZCNJ、WDUZCNS 无卤低烟低毒阻燃C类耐火 WDUZDN、WDUZDNJ、WDUZDNS 无卤低烟低毒阻燃D类耐火 a 根据电线电缆或光缆使用场合选择使用，可包括空间较小或环境相对密闭的人员密集场所等。 5.2 产品型号的组成 阻燃和耐火电线电缆或光缆产品的型号由燃烧特性代号和相关电线电缆或光缆型号两部分组成，见图1。 电线电缆或光缆型号 燃烧特性代号 图1 阻燃和耐火电线电缆或光缆的型号组成 5.3 产品表示方法 阻燃和耐火电线电缆或光缆产品用燃烧特性代号、产品型号、规格、本标准编号和产品标准编号表示。 示例1：铜芯，交联聚乙烯绝缘聚氯乙烯护套电力电缆，阻燃B类，额定电压0.6／1 kV，表示为： ZB-YJV-0.6／1规格(略)GB／T 19666—20XX／GB／T 12706.1—2008 示例2：铜芯，交联聚乙烯绝缘聚烯经护套电力电缆，无卤低烟，阻燃A类，供火加机械冲击和喷水的耐火，额定电压0.6／1 kV，表示为： WDZANS-YJY-0.6／1规格(略)GB／T 19666—20XX／GB／T 12706.1—2008 示例3：铜芯，交联聚乙烯绝缘聚烯经护套控制电缆，无卤低烟低毒，阻燃C类，供火加机械冲击的耐火，额定电压450／750 V，表示为： WDUZCNJ-KYJY-450／750规格(略)GB／T 19666—20XX／GB／T 9330.3—2008 示例4：实心聚乙烯绝缘阻燃聚烯经护套柔软对称射频电缆，无卤低烟，阻燃D类，表示为： WDZD-SEYYZ 规格(略)GB／T 19666—20XX／GB／T 14864—2013 6 燃烧性能要求 6.1 阻燃性能 6.1.1 单根阻燃性能 单根阻燃性能应符合表4的要求。 表4 单根阻燃性能 代号 试样外径d mm 供火时间 s 合格指标 试验方法 Z d≤25 60±2 1) 上夹具下缘与上炭化起始点之间的距离大于50 mm； 2) 上夹具下缘与下炭化起始点之间的距离不大于540 mm； 3) 试验过程中燃烧滴落物未引燃试样下方的滤纸 GB／T 18380.12a 和 GB／T 18380.13 25＜d≤50 120±2 50＜d≤75 240±2 d＞75 480±2 a 导体总截面积0.5 mm2以下细电线电缆或细光缆采用GB／T 18380.12试验方法供火时可能熔断，应采用GB／T 18380.22的试验方法，并不进行GB／T 18380.13的试验。 6.1.2 成束阻燃性能 成束阻燃性能应符合表5的要求。 表5 成束阻燃性能 代号 试样非金属材料体积L／m 供火时间min 合格指标 试验方法 ZA 7 40 试样上的炭化范围不应超过喷灯底边以上2.5 m GB／T 18380.33 ZB 3.5 40 GB／T 18380.34 ZC 1.5 20 GB／T 18380.35 ZDa 0.5 20 GB／T 18380.36 a 适用于外径小于或等于12 mm的小电线电缆或光缆以及导体标称截面积小于或等于35 mm2的电线电缆。 6.2 耐火性能 耐火性能应符合表6的要求。 注：特殊工况条件下，试验时间可由制造方和购买方协商确定。 表6 耐火性能 代号 适用范围 试验时间 试验电压 合格指标 试验方法 N 0.6／1 kV及以下电缆 90 min供火＋15 min冷却 额定电压 1) 2A熔断器不断 2) 指示灯不熄灭 GB／T 19216.21 数据电缆 90 min供火＋15 min冷却 110 V±10 V 1) 2A熔断器不断 2) 指示灯不熄灭 GB／T 19216.23 光缆 90 min供火+ 15 min冷却 — 最大衰减增量由产品标准规定或由供需双方协商确定 GB／T 19216.25 NJ 0.6／1 kV及以下外径小于或等于20 mm电缆 120 min 额定电压 1) 2A熔断器不断 2) 指示灯不熄灭 IEC 60331-2 0.6／1 kV及以下外径大于20 mm电缆 120 min 额定电压 1) 2A熔断器不断 2) 指示灯不熄灭 IEC 60331-1 NS 0.6／1 kV及以下外径小于或等于20 mm电缆 120 min，最后15 min水喷淋 额定电压 1) 2A熔断器不断 2) 指示灯不熄灭 附录A IEC 60331-2 0.6／1 kV及以下外径大于20 mm电缆 120 min，最后15 min水喷射 额定电压 1) 2A熔断器不断 2) 指示灯不熄灭 附录B IEC60331-1 6.3 无卤性能 无卤性能应符合表7的要求。 表7 无卤性能 代号 试验项目 单位 合格指标 试验方法 W 酸度和电导率试验： ——pH值 ——电导率 — μS／mm ≥4.3 ≤10 GB／T 17650.2 GB／T 17650.2 卤酸气体释出量试验： ——HCl和HBr含量 ——HF含量 ％ ％ ≤0.5 ≤0.1 GB／T 17650.1 IEC 60684-2：2011中45.2 卤素含量a： ——Cl ——F ——Br ——I mg／g mg／g mg／g mg／g ≤1.0 ≤1.0 ≤1.0 ≤1.0 IEC 60754-3 a 非强制要求的试验项目，可根据需要选择使用。 6.4 低烟性能 低烟性能应符合表8的要求。 表8 低烟性能 代号 试样外径d mm 试样根数 最小透光率 ％ 试验方法 D d＞40 1 60b GB／T 17651.2 20＜d≤40 2 10＜d≤20 3 5＜d≤10 45／da 1＜d≤5 (45／3d)×7a a 计算值取整数部分。 b 外径大于80 mm的电线电缆或光缆的最小透光率试验结果应乘以系数(d／80)作为最终结论。 6.5 低毒性能 试验方法及分析方法见附录C。 当电线电缆或光缆的应用场所有低毒性能要求时，应使用无卤低烟低毒阻燃和／或耐火电线电缆或光缆，毒性指数可由制造方和购买方协商确定。如果未规定，则推荐毒性指数小于或等于5。 毒性指数的计算见式(1)。 (1) 式中： ITC——毒性指数； m——试样的质量，单位为克(g)； MZ——试样燃烧后产生气体Z的质量，单位为毫克(mg)； CCZ——气体Z的临界浓度，单位为毫克每立方米(mg／m3)。即在气体Z中暴露30 min的致死浓度。 各种气体Z的临界浓度见表9。 表9 各种气体临界浓度 7 技术要求 7.1 阻燃电线电缆或光缆系列 7.1.1 (含卤)阻燃电线电缆或光缆 (含卤)阻燃电线电缆或光缆采用含卤材料制造，燃烧产物的腐蚀性较高，燃烧产生的烟雾较浓(透光率较低)。 按阻燃特性分为ZA、ZB、ZC、ZD四个类别，成束阻燃性能应符合6.1.2要求 (含卤)阻燃电线电缆或光缆的护套和／或绝缘可选用含卤阻燃材料，如阻燃聚氯乙烯、阻燃氯丁橡胶或添加含卤阻燃剂的阻燃聚烯经等，性能应符合相关产品标准要求。填充、包带或阻燃增强层等辅助材料应适当选用，使产品符合相应的阻燃类别要求。 7.1.2 无卤低烟阻燃电线电缆或光缆 无卤低烟阻燃电线电缆或光缆所用非金属材料卤素含量均很少，燃烧产物的腐蚀性较低，燃烧产生的烟雾较少(透光率较高)。按阻燃特性分为以下类别： ——无卤低烟单根阻燃WDZ，单根阻燃性能应符合6.1.1要求； ——无卤低烟成束阻燃WDZA、WDZB、WDZC、WDZD，成束阻燃性能应符合6.1.2要求。 无卤低烟阻燃电线电缆或光缆的护套和／或绝缘可选用无卤低烟阻燃材料，性能应符合相关产品标准要求。填充、包带或阻燃增强层等辅助材料应适当选用，使产品符合相应的阻燃类别要求。 无卤低烟阻燃电线电缆或光缆使用的非金属材料均应符合无卤要求，非金属材料燃烧时释出气体的酸度和电导率、卤酸气体释出量或卤素含量应符合6.3要求，成品烟密度(最小透光率)应符合6.4要求。