标准编号:	GB/T 9330-2020
中文名称:	塑料绝缘控制电缆
英文名称:	Plastic insulated control 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:	国家市场监督管理总局 国家标准化管理委员会
发布日期:	2020-03-31
实施日期:	2020-10-1
标准状态:	valid
替代旧标准:	GB/T 9330.1-2008 塑料绝缘控制电缆 第1部分：一般规定 GB/T 9330.2-2008 塑料绝缘控制电缆 第2部分：聚氯乙烯绝缘和护套控制电缆 GB/T 9330.3-2008 塑料绝缘控制电缆 第3部分：交联聚乙烯绝缘控制电缆
翻译语言:	英文
文件格式:	PDF
中文字符数:	29000 字
翻译价格(元):	3410.0
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 9330.1-2008 Plastic insulated control cables - Part 1: General requirements, GB/T 9330.2-2008 Plastic insulated control cables - Part 2: Polyvinyl chloride insulated and sheathed control cables and GB/T 9330.3-2008 Plastic insulated control cables - Part 3: Cross-linked polyethylene insulated control cables. This standard is developed based on GB/T 9330.1-2008, incorporating part of the contents of GB/T 9330.2-2008 and GB/T 9330.3-2008; the following main technical changes have been made with respect to GB/T 9330.1-2008: ——The copper/plastic composite tape (foil) screen has been added (see 4.1.3); ——The "conductor of fixed laying cable" has been modified to "conductor of hard structure cable" and "conductor of mobile laying cable" to "conductor of soft structure cable" (see 7.1.2; 6.1.2 of Edition 2008); ——The shrinkage test and water absorption test of XLPE insulation have been added (see Table 5); ——The requirements for the thickness of the thinnest part of metal layer of metal (composite) tape, the lapping rate of metal (composite) tape screen and the assessment requirement of diameter of single wire of metal wire braided screen have been added (see 7.4); ——The test indexes of thickness of extruded or lapped inner covering and average thickness measurement of lapped inner covering have been added (see 7.5.3); ——The assessment requirements for the thickness of armouring steel tapes and the diameter of armouring steel wire and the test method for the size of armour layer have been added (see 7.6.2); ——The requirements for sheath spark test have been added (see 7.7.2); ——The requirements for mechanical and physical properties of insulation have been added (see Table 5); ——The ST3 sheath has been deleted (see Table 7 of Edition 2008); ——The requirements for mechanical and physical properties of sheath have been added (see Tables 12 and 13); ——The provisions for measuring the number of cores through test have been added (see clause 8); ——The requirements for halogen-free property of cable nonmetallic materials have been added (see Table 15); ——The requirements for inspection have been added (see Table 19); ——The calculation method of the upper limit of cable outer diameter has been added (see A.2.7). This standard was proposed by China Electrical Equipment Industrial Association. This standard is under the jurisdiction of SAC/TC 213 National Technical Committee on Wires and Cables of Standardization Administration of China. The previous editions of the standard are as follows: ——GB/T 9330.1-1988 and GB/T 9330.1-2008; ——GB/T 9330.2-1988 and GB/T 9330.2-2008; ——GB/T 9330.3-2008. Plastic insulated control cables 1 Scope This standard specifies the product code and representation method, cable name and model specification, finished cable marking and insulated core identification, technical requirements, test methods and inspection rules, service characteristics and packaging of extruded PVC and cross linked polyethylene (XLPE) insulated, PVC, polyethylene and halogen-free polyolefin sheathed control cables with AC rated voltage U0/U of 450V/750V. This standard is applicable to the control cables which are fixedly laid and used in control or monitoring circuits and protection lines with AC rated voltage U0/U of 450V/750V or below. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 2900.10 Electrotechnical vocabulary - Electric cables GB/T 2951.11-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 11: Methods for general application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties GB/T 2951.12-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 12: Methods for general application - Thermal ageing methods GB/T 2951.13-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 13: Methods for general application - Measurement for determining the density - Water absorption tests - Shrinkage test GB/T 2951.14-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 14: Methods for general application - Test at low temperature GB/T 2951.21-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 21: Methods specific to elastomeric compounds - Ozone resistance, hot set and mineral oil immersion tests GB/T 2951.31-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 31: Methods specific to PVC compounds - Pressure test at high temperature - Test for resistance to cracking GB/T 2951.32-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 32: Methods specific to PVC compounds - Loss of mass test - Thermal stability test GB/T 2951.41-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 41: Methods specific to polyethylene and polypropylene compounds - Resistance to environmental stress cracking - Measurement of the melt flow index - Carbon black and/or mineral filler content measurement in polyethylene by direct combustion - Measurement of carbon black content by thermogravimetric analysis (TGA) - Assessment of carbon black dispersion in polyethylene using a microscope GB/T 3048.4-2007 Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors GB/T 3048.5-2007 Test methods for electrical properties of electric cables and wires - Part 5: Test of insulation resistance GB/T 3048.8-2007 Test methods for electrical properties of electric cables and wires - Part 8: AC voltage test GB/T 3048.9-2007 Test methods for electrical properties of electric cables and wires - Part 9: Spark test of insulated cores GB/T 3048.10-2007 Test methods for electrical properties of electric cables and wires - Part 10: Spark test of extruded protective sheaths GB/T 3956-2008 Conductors of insulated cables GB/T 4909.2-2009 Test methods for bare wires - Part 2: Measurement of dimensions GB/T 6995.1-2008 Markings for electric wires and cables - Part 1: General requirements GB/T 19666 Flame retardant and fire resistant wires and cables JB/T 8137 (all parts) Delivery drums for wires and cables 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 2900.10 and the following apply. 3.1 routine tests R test carried out, by the manufacturer, on all manufactured lengths of the finished cables in order to inspect whether all cables meet the specified requirements 3.2 sample tests S tests made by the manufacturer on samples of completed cable or elements taken from a completed cable so as to verify that the finished product meets the specified requirements 3.3 type tests T test carried out on a type of cable specified in this standard before supply according to general commercial principle in order to verify that the cable properties meet the intended service conditions Note: This test is characterized by the fact that once the type test is conducted, it is unnecessary to repeat it unless the cable characteristic is potentially changed due to the change in material, design or manufacturing process of cable 3.4 rated voltage reference voltage for cable structure design and electrical performance test Note: It is expressed by U0/U in V; U0 is the voltage r.m.s. between any insulated conductor and the "ground" (cable metallic protective layer or surrounding medium); U is the voltage r.m.s. between any two-phase conductors of multicore cable system.   4 Product codes and representation methods 4.1 Product codes See Table 1 for product codes. Table 1 Product codes Item name Code Series Control cable K Material characteristic Copper conductor Omitted PVC insulation V XLPE insulation YJ PVC sheath V Polyethylene or halogen-free polyolefin sheath Y Structure characteristic Braided screen P Copper tape screen P2 Aluminum/plastic composite tape (foil) screen P3 Copper/plastic composite tape (foil) screen P4 Flexible structure R Double-layer steel tape armouring 2 Steel wire armouring 3 PVC oversheath 2 Polyethylene or halogen-free polyolefin oversheath 3 Note: Aluminum/plastic composite tape (foil) may be referred to as aluminum/plastic composite tape for short; copper/plastic composite tape (foil) may be referred to as copper/plastic composite tape for short; copper tape, aluminum/plastic composite tape (foil) and copper/plastic composite tape (foil) may be collectively referred to as metal (composite) tape. 4.2 Product representation methods 4.2.1 The products shall be expressed by model, specification and standard number. 4.2.2 If the products has requirements for combustibility, the representation method of the product shall meet the requirements of GB/T 19666. 4.2.3 Cables of the same type and specification having different conductor structures shall be expressed separately, with Class 1 conductor expressed by (A) (omitted), and Class 2 conductor expressed by (B), which shall be indicated after the specification.   4.2.4 The green-yellow insulated cores in the cable shall be indicated separately from other cores. Example 1: Copper conductor PVC insulated and sheathed control cable, 24 cores, 1.5mm2 (structure of Class 1 conductor), with a rated voltage of 450V/750V and green-yellow insulated core, is expressed as: KVV-450/750 23×1.5+1×1.5 GB/T 9330-2020 Example 2: Copper conductor PVC insulated and sheathed control cable, 24 cores, 1.5mm2 (structure of Class 2 conductor), with a rated voltage of 450V/750V and green-yellow insulated core, is expressed as: KVV-450/750 23×1.5(B)+1×1.5(B) GB/T 9330-2020 Example 3: Copper conductor XLPE insulated PVC sheathed copper-tape screened control cable, 24 cores, 1.5mm2 (structure of Class 1 conductor), with a rated voltage of 450V/750V, without green-yellow insulated core, shall be expressed as: KYJVP2-450/750 24×1.5 GB/T 9330-2020 Example 4: Copper conductor PVC insulated and sheathed Category B flame-retardant flexible control cable, 24 cores, 1.5mm2, with a rated voltage of 450/750V, without green-yellow insulated core shall be expressed as: ZB-KVVR-450/750 24×1.5 GB/T 9330-2020 Example 5: Copper conductor XLPE insulated polyolefin sheathed steel wire armored halogen-free low-smoke flame-retardant Category A fire-resisting control cable, 24 cores, 1.5mm2 (structure of Class 1 conductor), with a rated voltage of 450V/750V, without green-yellow insulated core, shall be expressed as: WDZAN-KYJY33-450/750 24×1.5 GB/T 9330-2020

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Product codes and representation methods 5 Name, type and specification of cables 6 Markings for finished cables and identifications of insulated cores of cables 7 Technical requirements and test methods 8 Finished cables 9 Delivery length 10 Inspection rules 11 Service characteristics 12 Packaging Annex A (Normative) Calculation method of assumed values

塑料绝缘控制电缆 1 范围 本标准规定了交流额定电压U0／U为450／750 V挤包聚氯乙烯和交联聚乙烯绝缘、聚氯乙烯、聚乙烯和无卤聚烯烃护套控制电缆的产品代号和表示方法、电缆名称和型号规格、成品电缆标志和绝缘线芯识别、技术要求、试验方法和检验规则、使用特性以及包装等。 本标准适用于交流额定电压U0／U为450／750 V及以下控制、监控回路及保护线路等场合固定敷设使用的控制电缆。 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 2900.10 电工术语 电缆 GB／T 2951.11—2008 电缆和光缆绝缘和护套材料通用试验方法 第11部分：通用试验方法——厚度和外形尺寸测量——机械性能试验 GB／T 2951.12—2008电缆和光缆绝缘和护套材料通用试验方法 第12部分：通用试验方法——热老化试验方法 GB／T 2951.13—2008 电缆和光缆绝缘和护套材料通用试验方法 第13部分：通用试验方法——密度测定方法——吸水试验——收缩试验 GB／T 2951.14—2008 电缆和光缆绝缘和护套材料通用试验方法 第14部分：通用试验方法——低温试验 GB／T 2951.21—2008 电缆和光缆绝缘和护套材料通用试验方法 第21部分：弹性体混合料专用试验方法——耐臭氧试验——热延伸试验——浸矿物油试验 GB／T 2951.31—2008 电缆和光缆绝缘和护套材料通用试验方法 第31部分：聚氯乙烯混合料专用试验方法——高温压力试验——抗开裂试验 GB／T 2951.32—2008 电缆和光缆绝缘和护套材料通用试验方法 第32部分：聚氯乙烯混合料专用试验方法——失重试验——热稳定性试验 GB／T 2951.41—2008 电缆和光缆绝缘和护套材料通用试验方法 第41部分：聚乙烯和聚丙烯混合料专用试验方法——耐环境应力开裂试验——熔体指数测量方法——直接燃烧法测量聚乙烯中碳黑和（或）矿物质填料含量——热重分析法（TGA）测量碳黑含量——显微镜法评估聚乙烯中碳黑分散度 GB／T 3048.4—2007 电线电缆电性能试验方法 第4部分：导体直流电阻试验 GB／T 3048.5—2007 电线电缆电性能试验方法 第5部分：绝缘电阻试验 GB／T 3048.8—2007 电线电缆电性能试验方法 第8部分：交流电压试验 GB／T 3048.9—2007 电线电缆电性能试验方法 第9部分：绝缘线芯火花试验 GB／T 3048.10—2007 电线电缆电性能试验方法 第10部分：挤出护套火花试验 GB／T 3956—2008 电缆的导体 GB／T 4909.2—2009 裸电线试验方法 第2部分：尺寸测量 GB／T 6995.1—2008 电线电缆识别标志方法 第1部分：一般规定 GB／T 19666 阻燃和耐火电线电缆通则 JB／T 8137（所有部分）电线电缆交货盘 3 术语和定义 GB／T 2900.10界定的以及下列术语和定义适用于本文件。 3.1 例行试验 routine tests R 由制造方在成品电缆的所有制造长度上进行的试验，以检验所有电缆是否符合规定的要求。 3.2 抽样试验 sample tests S 由制造方在成品电缆试样上或取自成品电缆的元件上进行的试验，以检验成品电缆是否符合规定的要求。 3.3 型式试验 type tests T 按一般商业原则对本标准规定的一种型号电缆在供货之前所进行的试验，以证明电缆具有满足预期使用条件的满意性能。 注：该试验的特点是：除非电缆材料或设计或制造工艺的改变可能改变电缆的特性，试验做过以后就不需要重做。 3.4 额定电压 rated voltage 电缆结构设计和电性能试验的基准电压。 注：用U0／U表示，单位为伏特（V）。U0为任一绝缘导体和“地”（电缆的金属护层或周围介质）之间的电压有效值， U为多芯电缆系统任何两相导体之间的电压有效值。 4 产品代号和表示方法 4.1 产品代号 产品代号见表1。 表1 产品代号 项目名称 代号 系列 控制电缆 K 材料特征 铜导体 省略 聚氯乙烯绝缘 V 交联聚乙烯绝缘 YJ 聚氯乙烯护套 V 聚乙烯或无卤聚烯烃护套 Y 结构特征 编织屏蔽 P 铜带屏蔽 P2 铝／塑复合带（箔）屏蔽 P3 铜／塑复合带（箔）屏蔽 P4 软结构 R 双钢带铠装 2 钢丝铠装 3 聚氯乙烯外护套 2 聚乙烯或无卤聚烯烃外护套 3 注：铝／塑复合带（箔）可简称铝／塑复合带；铜／塑复合带（箔）可简称铜／塑复合带；铜带、铝／塑复合带（箔）、铜／塑复合带（箔）可统称金属（复合）带。 4.2 产品表示方法 4.2.1 产品用型号、规格及标准编号表示。 4.2.2 当产品有燃烧特性要求时，产品表示方法应符合GB／T 19666的规定。 4.2.3 同一型号规格电缆有不同导体结构时应分别表示，第1种导体用（A）表示（省略），第2种导体用（B）表示，在规格后标明。 4.2.4 电缆中的绿／黄组合色绝缘线芯应与其他线芯分别表示。 示例1：铜芯聚氯乙烯绝缘聚氯乙烯护套控制电缆，额定电压450／750 V、24芯、1.5mm2（第1种导体结构）、有绿／黄组合色绝缘线芯，表示为： KVV-450／750 23×1.5＋1×1.5 GB／T 9330—2020 示例2：铜芯聚氯乙烯绝缘聚氯乙烯护套控制电缆，额定电压450／750 V、24芯、1.5mm2（第2种导体结构）、有绿／黄组合色绝缘线芯，表示为： KVV-450／750 23×1.5（B）＋1×1.5（B） GB／T9330—2020 示例3：铜芯交联聚乙烯绝缘聚氯乙烯护套铜带屏蔽控制电缆，额定电压450／750 V、24芯、1.5mm2（第1种导体结构）、无绿／黄组合色绝缘线芯，表示为： KYJVP2-450／750 24×1.5 GB／T 9330—2020 示例4：铜芯聚氯乙烯绝缘聚氯乙烯护套阻燃B类控制软电缆，额定电压450／750 V、24芯、1.5mm2、无绿／黄组合色绝缘线芯，表示为： ZB-KVVR-450／750 24×1.5 GB／T 9330—2020 示例5：铜芯交联聚乙烯绝缘聚烯烃护套钢丝铠装无卤低烟阻燃A类耐火控制电缆，额定电压450／750 V、24芯、1.5mm2（第1种导体结构）、无绿／黄组合色绝缘线芯，表示为： WDZAN-KYJY33-450／750 24×1.5 GB／T 9330—2020 5 电缆名称、型号和规格 5.1 常用的电缆型号和名称见表2。 表2 常用的电缆型号和名称 型号a 名称b KVV 聚氯乙烯绝缘聚氯乙烯护套控制电缆 KVVP 聚氯乙烯绝缘聚氯乙烯护套编织屏蔽控制电缆 KVVP2 聚氯乙烯绝缘聚氯乙烯护套铜带屏蔽控制电缆 KVVP3 聚氯乙烯绝缘聚氯乙烯护套铝／塑复合带屏蔽控制电缆 KVVP4 聚氯乙烯绝缘聚氯乙烯护套铜／塑复合带屏蔽控制电缆 KVV22 聚氯乙烯绝缘聚氯乙烯护套钢带铠装控制电缆 KVVP2-22 聚氯乙烯绝缘聚氯乙烯护套铜带屏蔽钢带铠装控制电缆 KVV32 聚氯乙烯绝缘聚氯乙烯护套钢丝铠装控制电缆 KVVR 聚氯乙烯绝缘聚氯乙烯护套控制软电缆 KVVRP 聚氯乙烯绝缘聚氯乙烯护套编织屏蔽控制软电缆 KYJV 交联聚乙烯绝缘聚氯乙烯护套控制电缆 KYJVP 交联聚乙烯绝缘聚氯乙烯护套编织屏蔽控制电缆 KYJVP2 交联聚乙烯绝缘聚氯乙烯护套铜带屏蔽控制电缆 KYJVP3 交联聚乙烯绝缘聚氯乙烯护套铝／塑复合带屏蔽控制电缆 KYJVP4 交联聚乙烯绝缘聚氯乙烯护套铜／塑复合带屏蔽控制电缆 KYJV22 交联聚乙烯绝缘聚氯乙烯护套钢带铠装控制电缆 KYJVP2-22 交联聚乙烯绝缘聚氯乙烯护套铜带屏蔽钢带铠装控制电缆 KYJV32 交联聚乙烯绝缘聚氯乙烯护套钢丝铠装控制电缆 KYJY 交联聚乙烯绝缘聚乙烯护套控制电缆 KYJYP 交联聚乙烯绝缘聚乙烯护套编织屏蔽控制电缆 KYJYP2 交联聚乙烯绝缘聚乙烯护套铜带屏蔽控制电缆 KYJYP3 交联聚乙烯绝缘聚乙烯护套铝／塑复合带屏蔽控制电缆 KYJYP4 交联聚乙烯绝缘聚乙烯护套铜／塑复合带屏蔽控制电缆 KYJY23 交联聚乙烯绝缘聚乙烯护套钢带铠装控制电缆 KYJYP2-23 交联聚乙烯绝缘聚乙烯护套铜带屏蔽钢带铠装控制电缆 KYJY33 交联聚乙烯绝缘聚乙烯护套钢丝铠装控制电缆 a 阻燃电缆、无卤低烟阻燃电缆、耐火电缆及其组合型电缆的名称和型号应按GB／T 19666的规定在上述型号的基础上编制。制造方和需求方如有需求，电缆型号也可按第4章的规定进行组合，组合的型号应合理。 b 无卤低烟阻燃电缆和无卤低烟阻燃耐火电缆护套代号Y或3表示无卤聚烯烃护套。 5.2 电缆的规格见表3。 表3 电缆规格 型号a 导体标称截面积 mm2 0.5 0.75 1.0 1.5 2.5 4 6 10 芯数b a 阻燃电缆、无卤低烟阻燃电缆、耐火电缆及其组合型电缆的规格范围同上述对应型号的规格范围。 b 推荐的芯数系列为2、3、4、5、7、8、10、12、14、16、19、24、27、30、37、44、48、52和61芯。 6 成品电缆标志和电缆绝缘线芯识别 6.1 成品电缆标志 6.1.1 标志内容 成品电缆上应有制造厂名称、电缆型号、规格和额定电压的连续标志，制造厂名称标志可以是制造厂名称或注册商标。 6.1.2 标志连续性 应标识在电缆外护套上，一个完整标志的末端与下一个标志的始端之间的距离不应超过550mm。 6.1.3 清晰度 所有标志应字迹清晰。 6.1.4 耐擦性 油墨印刷标志应耐擦，擦拭后的标志应基本保持不变。 6.2 电缆绝缘线芯识别 6.2.1 一般要求 6.2.1.1 电缆绝缘线芯应采用着色绝缘识别或采用数字识别。除用绿／黄组合色识别的绝缘线芯外，电缆的每一绝缘线芯应只用一种颜色。 6.2.1.2 除绿／黄组合色绝缘线芯外，其他绝缘线芯均不应使用绿色和黄色。 6.2.1.3 绿／黄组合色绝缘线芯，其中一种颜色应至少覆盖绝缘线芯表面的30％，且不大于70％，另一种颜色则应覆盖绝缘线芯的其余部分，并在整个长度的绝缘线芯上应保持一致。 6.2.2 电缆绝缘线芯的着色识别 当电缆绝缘线芯采用着色绝缘识别时，五芯及以下电缆优先选用的色谱为： ——两芯电缆：无优先选用色谱； ——三芯电缆：绿／黄组合色、蓝色、棕色，或者蓝色、黑色、棕色； ——四芯电缆：绿／黄组合色、蓝色、黑色、棕色，或者蓝色、黑色、棕色、灰色或橙色； ——五芯电缆：绿／黄组合色、蓝色、黑色、棕色、灰色或橙色，或者蓝色、黑色、棕色、灰色、橙色或其他不同的颜色。 当对色谱有特殊要求或其他芯数电缆需要采用着色绝缘识别时，由供需双方协商确定电缆的色谱。需方未做要求时，由供方确定电缆的色谱。 各种颜色应易于识别并耐擦，擦拭后的颜色应基本保持不变。 6.2.3 电缆绝缘线芯的数字识别 6.2.3.1 一般要求 当电缆绝缘线芯采用数字识别时，绝缘应为同一种颜色并按数序排列，但绿／黄组合色绝缘线芯（若有）除外。 数字应用阿拉伯数字印刷在绝缘线芯外表面上。数字颜色应相同，并与绝缘颜色有明显反差。字迹应清晰，油墨印刷的数字应耐擦，擦拭后的标志应基本保持不变。 6.2.3.2 标志的排列方法 数字识别标志应沿着绝缘线芯以相等的间隔重复出现，相邻两组数字标志应彼此颠倒。 当标志由单个数字组成时，应在数字的下面加横线。当标志由两个数字组成时，应上下排列，并在后面数字的下面加横线。相邻两组数字标志的间距di不应大于50 mm。数字识别标志的排列方式见图1。 图1 绝缘线芯数字识别标志的排列方式 7 技术要求和试验方法 7.1 导体 7.1.1 导体材料 导体材料应是退火铜线，导体中的单线可以不镀锡或镀锡。 7.1.2 导体结构 硬结构电缆的导体应采用GB／T 3956—2008中第1种圆形实心导体或第2种圆形绞合导体。 软结构电缆的导体应采用GB／T 3956—2008中第5种软铜导体。 7.2 绝缘 7.2.1 绝缘材料 绝缘材料应为表4所列的各类绝缘混合物中的一种，不同类型绝缘混合物电缆的导体最高温度见表4，绝缘的机械物理性能要求及试验方法见表5。耐火控制电缆的绝缘应具备耐火特性，否则应在导体和绝缘之间设置耐火层。