This part specifies the symmetrical pair or star twisted cables for digital communication The definition, requirements, and test methods of (hereinafter referred to as "cables"). The cables specified in this section are applicable to digital communication systems such as local area networks. 2 The definitions and test methods specified in this section are also applicable to symmetrical cables used for wiring in other user buildings. 2 Normative reference documents The following documents are essential for the application of this section. For dated reference documents, only the dated version applies to this document. For undated reference documents The latest version of the referenced document (including all modification orders) applies to this document. GB/T 2421.1-2008 Environmental Testing for Electrical and Electronic Products - Part 1: Overview and Guidelines (IEC 60068.l, IDT) GB/T 2951.11-2008 General Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables - Part 11: General Test Methods - Measurement of Thickness and Boundary Dimensions - Mechanical Performance Testing (IEC 60811-1-1, IDT) GB/T 2951.12-2008 General Test Methods for Insulation and Sheath Materials of Electric and Optical Cables - Part 12: General Test Methods - Thermal Aging Test Method (IEC 60811-1-2, IDT) GB/T 2951.13-2008 General Test Methods for Insulation and Sheath Materials of Electric and Optical Cables - Part 13: General Test Methods - Determination of Density - Water Absorption Test - Shrinkage Test (IEC 60811-1-3, IDT) GB/T 2951.14-2008 General Test Methods for Insulation and Sheath Materials of Electric and Optical Cables - Part 14: General Test Methods - Low Temperature Test (IEC 60811-1-4, IDT) GB/T 2951.31-2008 General Test Methods for Insulation and Sheath Materials of Electric and Optical Cables - Part 31: Special Test Methods for Polyvinyl Chloride Mixtures - High Temperature Pressure Test - Resistance to Cracking (IEC 60811-3-1, IDT) GB/T 2951.41-2008 General Test Methods for Insulation and Sheath Materials of Electric and Optical Cables - Part 41: Specific Test Methods for Polyethylene and Polypropylene Mixtures - Environmental Stress Cracking Resistance Test - Melt Index Measurement Method - Direct Combustion Method for Measuring Carbon Black and Mineral Filler Content in Polyethylene - Thermogravimetric Analysis (TGA) Method for Measuring Carbon Black Content - Microscopic Method for Evaluating Carbon Black Dispersion in Polyethylene (IEC60811-4-1, IDT) GB/T 2951.42-2008 General Test Methods for Insulation and Sheath Materials of Electric and Optical Cables - Part 42: Specific Test Methods for Polyethylene and Polypropylene Mixtures - Tensile Strength and Elongation at Break Test after High Temperature Treatment - Winding Test after High Temperature Treatment - Winding Test after Air Thermal Aging - Determination of Mass Increase - Long term Thermal Stability Test - Copper Catalytic Oxidation Degradation Test Method (IEC 60811-4-2, IDT) GB/T 3953-2009 Round Copper Wire for Electrical Purposes (IEC 60028, NEQ) GB/T 4910-2009 Tinned Round Copper Wire GB/T 6995.2-2008 Identification and Marking Methods for Electric Wire and Cable Part 2: Standard Colors GB/T 7424.2-2009 General Specification for Optical Fiber Cable Part 2: Basic Test Methods for Optical Fiber Cable (IEC 60794-1-2, MOD) GB/T 11327.1-1999 Polyvinyl Chloride Insulated Polyvinyl Chloride Sheathed Low Frequency Communication Cable Part I: General Test and Measurement Methods (IEC 60189-1, NEQ) GB/T 14733.2-2008 Telecommunications Terminology - Transmission Lines and Waveguides (IEC 60050.726, IDT)
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