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GB/T 11918.1-2025: Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part 1: General requirements
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GB/T 11918.1-2025	English	1639	Add to Cart	10 days [Need to translate]	Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part 1: General requirements
GB/T 11918.1-2014	English	145	Add to Cart	0--9 seconds. Auto-delivery	Plugs, socket-outlets and couplers for industrial purposes -- Part 1: General requirements
GB/T 11918-2001	English	RFQ	ASK	7 days [Need to translate]	Industrial plugs and sockets and couplers -- Part 1: General requirements
GB/T 11918-1989	English	RFQ	ASK	9 days [Need to translate]	Plugs, socket-outlets and couplers for industrial purpose--General requirement

GB/T 11918.1-2025: Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part 1: General requirements

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ICS 29.120.30 CCSK30 National Standards of the People's Republic of China Replaces GB/T 11918.1-2014 Industrial plugs, fixed or mobile sockets and Appliance Input Sockets Part 1.General Requirements purposes-Part 1.General requirements Published on 2025-10-05 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface V Introduction IX 1.Scope 1 2 Normative References 1 3 Terms and Definitions 4.General Requirements 9. 5 Standard rating 10 6 categories 10 7.Mark 11 8 Size 14 9.Protection against electric shock 15 10 Grounding measures 18 11 Terminals and connectors 19 12 Interlocking 31 13.Aging resistance of rubber and thermoplastic materials 31 14 Structure 32 15.Structure of a fixed socket 32 16.Structure of plugs and removable sockets 33 17.Structure of appliance input socket 34 18 Protection level 34 19.Insulation resistance and electrical strength 35 20 breaking capacity 36 21 Normal operation 38 22°C temperature rise 39°C 23 Flexible cables and their connections 41 24 Mechanical strength 46 25 Screws, current-carrying components and connectors 52 26 Creepage distance, clearance, and distance to sealant penetration 54 27 Heat resistant, flame retardant, and resistant to electrical tracking 56 28 Corrosion resistance and rust prevention 57 29 Short-circuit current withstand test 57 30 Electromagnetic compatibility 61 Appendix A (Normative) Guidelines and Instructions for Test Apparatus 63 References 70 Figure 1.Schematic diagram of the uses of electrical accessories 4 Figure 2.Column-type terminal 5 Figure 3 Screw terminal 5 Figure 4 Bolt terminal 6 Figure 5 Saddle-type terminal 6 Figure 6.Terminal 6 Figure 7.Cover-type terminal 7 Figure 8.Unthreaded terminal 7 Figure 9.Insulation piercing terminal 8 Figure 10 Test piston 14 Figure 11.Probe "A" for inspecting the protective door. 17 Figure 12.Probe "B" for inspecting the protective door. 18 Figure 13.Gauge used to check the insertability of an untreated round conductor with the maximum specified cross-sectional area. Figure 14 Schematic diagram of bending test 25 Figure 15 Terminal test configuration 28 Figure 16 Circuit diagram for disconnection operation and normal operation 37 Figure 17 Cable fixing component test device 43 Figure 18.Configuration for mechanical strength testing of plugs and removable sockets 49 Figure 19 Bending test apparatus 50 Figure 20 shows the test circuit diagram used to verify the short-circuit current withstand capability of a two-pole device under single-phase AC or DC conditions. (59) Figure 21 Test circuit 60 used to verify the short-circuit current withstand capability of the triode device Figure 22 Test circuit used to verify the short-circuit current withstand capability of a four-pole device 61 Figure A.1 Impact testing apparatus --- pendulum assembly 65 Figure A.2 Impact testing apparatus – Pendulum mass (quantity. 4) 66 Figure A.3 Impact testing apparatus --- pendulum shaft end 67 Figure A.4 Impact testing apparatus---pendulum anvil 67 Figure A.5 Impact testing apparatus --- pendulum shaft 68 Figure A.6 Impact testing apparatus --- pendulum pivot 68 Figure A.7 Rear plate and mounting plate of the impact testing device 69 Table 1 Preferred value of rated current 10 Table 2 Color Code 14 Table 3 Connectable conductor sizes 21 Table 4 Forces in the Bending Test 26 Table 5 Bending values of copper conductors under mechanical load tests 28 Table 6 Tensile test values 29 Table 7 Test current values for voltage drop test 30 Table 8 Electrical Strength Test 35 Table 9 Breaking capacity 38 Table 10 Normal Operation 39 Table 11 Test current and conductor cross-sectional area for temperature rise test (40) Table 12 Types and Nominal Cross-sectional Areas of Flexible Cables 41 Table 13 Approximate cable outer diameter 44 Table 14 Tensile Force and Torque Values Exerted by the Cable 46 Table 15 Impact Energy 47 Table 16 Test force 50 for bending test Table 17 Force applied to the wrench 51 Table 18 Insulating cap test tensile force 52 Table 19 Test torque value 53 Table 20 Creepage Distance, Clearance and Through-Seal Distance 54 Table A.1 Impact Test Release Angle 66

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document is Part 1 of GB/T 11918.GB/T 11918 has the following parts published. ---Industrial plugs, stationary or mobile sockets and appliance input sockets - Part 1.General requirements; ---Industrial plugs, fixed or mobile sockets and appliance input sockets Part 2.Dimensions of electrical accessories with pins and sockets Size compatibility requirements; ---Industrial plugs, fixed or mobile sockets and appliance input sockets - Part 4.Sockets with or without interlocking switches; ---Industrial plugs, sockets and couplers, Part 5.Plugs, sockets and marine couplings for low-voltage shore power connection systems (LVSC systems) Size compatibility and interchangeability requirements for connectors and marine input sockets; ---Industrial plugs, sockets and couplers Part 6.DC plugs, sockets and connectors for marine shore power systems. This document supersedes GB/T 11918.1-2014 "Industrial plugs, sockets and couplers – Part 1.General requirements", and is consistent with GB/T 11918.1- Compared to.2014, aside from structural adjustments and editorial changes, the main technical changes are as follows. ---This document does not include accessories for single-pole electrical appliances (see Chapter 1); ---The terminology and definition of fixed sockets have been changed (see 3.1, 3.1.1 of the.2014 edition); ---The terminology and definition of portable outlets have been changed (see 3.3, 3.2.1 of the.2014 edition); ---The terminology for interlocking has been changed (see 3.8, 3.9 in the.2014 edition); ---The terminology and definition for insulated piercing terminals have been changed (see 3.17.8, 3.18.8 in the.2014 edition); ---The definition of the clamping element has been changed (see 3.18, 3.19 in the.2014 version); ---The definition of "cover" has been changed (see 3.21, 3.22 in the.2014 version); ---Added "Main Components", "Protective Doors", "Insulating Caps", "Contacts", "Control Contacts", "Compatibility/Integration", and "Trained Personnel" The terminology and definition of "skilled technician" (see 3.5, 3.22, 3.23, 3.24, 3.25, 3.26, 3.27, 3.28); ---The following terms have been removed. "plugs and sockets", "cable couplers", "appliance couplers", "mechanical switches", "sockets with switches", and "integral switches". "Turn off electrical appliances" (see sections 3.1, 3.2, 3.3, 3.6, 3.7, and 3.8 of the.2014 edition); ---The descriptions of the rated operating voltage range and preferred rated operating voltage values have been revised (see 5.1,.2014 edition of 5.1); ---The description of the classification by cable connection method has been revised (see 6.4, 6.1.4 in the.2014 edition); ---Added classifications by protective door and by insulating cap (see 6.9, 6.10); ---The wording of "interchangeability" has been changed to "compatibility" (see 7.1,.2014 version 7.1); ---Added explanations for using the AC and DC symbols (see 7.2); ---Added marking requirements for other indicators of neutral terminals and/or grounding terminals, and added marking requirements for control conductor terminals. Please remove the explanation that R1, S2, and T3 can be used to replace L1, L2, and L3 (see 7.5,.2014 version 7.5). ---The testing method for the marking has been changed, and chemical reagent annotations, safety requirements for the use of chemical reagents, and specific testing procedures have been added (see...). 7.6 (2014 version 7.6); ---The voltage range of the electrical indicator in the electric shock protection test has been changed (see 9.1,.2014 edition of 9.1); ---Added requirements and test methods for electric shock protection of electrical accessories with protective shutters (see 9.4); ---The grounding requirement for sockets installed in the output circuit of isolation transformers has been removed (see 10.1 in the.2014 edition); ---Added "Excludes screws, nuts, washers, U-clamps, clamping plates and similar parts" and "Other corrosion resistance properties are no less than copper and..." Other metals with suitable mechanical properties should be considered for evaluation (see 11.1.4); ---Added the requirement that "terminals and ends should be protected to prevent rotation" (see 11.1.6); ---Added "If the clamping device has a conductor mounting guide, the terminals should be tested after the device is installed" (see 11.5.1); ---Added. "Test points should be as close as possible to the terminal clamps. If this is not possible, the voltage drop between the conductors at the two test points should be considered." Remove the test value (see 11.6); ---Added additional conditions, based on consultation between the manufacturer and the laboratory, to allow for joint aging tests of rubber and thermoplastics. (See Chapter 13); ---Added requirements for contact structure (see 14.2); ---The requirements that the appliance input socket pin should not rotate and that there should be no special devices that allow connection of more than one connector have been removed (see...). (Pages 17.1 and 17.4 of the.2014 edition) ---The requirement has been added that "tests should be conducted in accordance with the requirements of GB/T 2423.3 and the parameters specified in this document" (see 18.3); ---Added electrical strength test methods applicable to DC systems (see 19.5); ---A new heading, "Tension and Moment Tests," has been added (see 23.3); ---Added bending test requirements for electrical accessories with a rated current greater than 32A (see 24.4); ---Increased mechanical strength requirements for protective doors and insulating caps (see 24.6, 24.7); ---The general requirements for creepage distances and clearances have been changed (see 26.1,.2014 edition); ---The requirements for immunity to interference and transmission have been changed (see 30.1, 30.2,.2014 edition of 30.1, 30.2). This document is modified to adopt IEC 60309-1.2021 "Industrial plugs, fixed or mobile sockets and appliance input sockets - Part 1" Part. General Requirements. The technical differences between this document and IEC 60309-1.2021, and the reasons therefor, are as follows. --- Added "This document specifies the requirements for industrial plugs, fixed or mobile sockets, and appliance input sockets (hereinafter referred to as 'Electrical Accessories')." The technical requirements for the structure, mechanical properties, electrical properties, etc. of the components (see Chapter 1) shall comply with the requirements of GB/T 1.1-2020; ---ISO /IEC Guide 51 (see 4.1) has been replaced with the normatively referenced GB/T 20002.4 to adapt to my country's technical conditions, and has been expanded. Increase operability; ---IEC 60664-1.2020 (see 4.1, 26.1.3, 26.1.4, 26.1.5) has been replaced by the normatively referenced GB/T 16935.1-2023. 26.1.6), to adapt to my country's technological conditions and increase operability; ---IEC 60112 (see 4.1, 26.1.5, 27.3) has been replaced with the normatively referenced GB/T 4207 to adapt to my country's technical conditions, and additional... Increase operability; ---IEC 60227 (all parts) (see 4.2.6) has been replaced with the normatively referenced GB/T 5023 (all parts) to adapt to my country's national standards. Technical conditions, increasing operability; ---The requirement to include the document number in the marking requirements has been added (see 7.1) to adapt to my country's technical conditions and increase operability; ---IEC 60417 (see 7.2) has been replaced with the normatively referenced GB/T 5465.2-2023 to adapt to my country's technical conditions, and the following has been added. Operability; ---The letter E and/or yellow-green can also indicate grounding in the marking requirements (see 7.5) to adapt to my country's technical conditions. Increase operability; ---IEC 60320 (all parts) (see 8.3) has been replaced with the normatively referenced GB/T 17465 (all parts) to adapt to my country's national standards. Technical conditions, increasing operability; ---The voltage range of the electrical indicator in the electric shock protection test has been changed (see 9.1) to ensure consistency throughout the document; ---IEC 61032 (see 9.1, 24.7.1) has been replaced with the normatively referenced GB/T 16842 to adapt to my country's technical conditions, and the following has been added. Operability; ---The test temperature range for the protective doors of sockets and appliance input sockets with thermoplastic housings and bodies has been changed (see 9.4). To adapt to my country's technological conditions and increase operability; ---ISO 1456 (see 11.1.4) has been replaced with the normatively referenced GB/T 9797 to adapt to my country's technical conditions and increase operability. Actual nature; ---ISO 2081 has been replaced with the normatively referenced GB/T 9799 (see 11.1.4) to adapt to my country's technical conditions and increase operability. Actual nature; ---ISO 2093 has been replaced with the normatively referenced GB/T 12599 (see 11.1.4) to adapt to my country's technical conditions and increase operability. Actual nature; ---IEC 60309-4.2021 (see Chapter 12) has been replaced with the normatively referenced GB/T 11918.4 to adapt to my country's technical requirements. Add components to increase operability; ---IEC 60068-2-78 (see 18.3) has been replaced with the normatively referenced GB/T 2423.3 to adapt to my country's technical conditions and add [further details needed]. Operability; --- An electrical strength test method applicable to DC systems has been added (see 19.5) to adapt to my country's technical conditions and increase operability; ---The bending test requirements for electrical accessories with a rated current greater than 32A have been added (see 24.4) to adapt to my country's technical conditions. Operability; ---IEC 60068-2-14 (see 24.7.2) has been replaced with the normatively referenced GB/T 2423.22 to adapt to my country's technical conditions, and has been expanded. Increase operability; ---IEC 60664-3 (see 26.1.3, 26.1.6) has been replaced with the normatively referenced GB/T 16935.3 to adapt to my country's technical conditions. Increase operability; ---IEC 60695-10-2 (see 27.1) has been replaced with the normatively referenced GB/T 5169.21 to adapt to my country's technical conditions, and the following has been added. Operability; ---IEC 60695-2-11 (see 27.2) has been replaced with the normatively referenced GB/T 5169.11 to adapt to my country's technical conditions, and the following has been added. Operability; ---IEC 60269-2 (see 29.2.1) has been replaced with the normatively referenced GB/T 13539.2 to adapt to my country's technical conditions and add [further details needed]. Operability; ---IEC 61000-6-2 (see 30.1) has been replaced with the normatively referenced GB/T 17799.2 to adapt to my country's technical conditions and add [further details needed]. Operability; ---IEC 61000-6-3 (see 30.2) has been replaced with the normatively referenced GB/T 17799.3 to adapt to my country's technical conditions and add [further details needed]. Operability. The following editorial changes have been made to this document. ---Notes have been added to the terminology and definition of "interlocking" (see 3.9) to adapt to my country's technical conditions and increase operability; ---A note has been added to Table 1 of the preferred standard rated current values, indicating the use of Sequence I recommended in my country (see Table 1), to adapt to Chinese technical standards. Improve technical conditions and increase operability; ---Added annotations for classification by protection level (see 6.2) to adapt to my country's technical conditions and increase operability; ---Based on the actual experimental content, Chapter 14 in 7.6 has been changed to Chapter 18 (see 7.6); ---For easier reference, a note has been added. "GB/T 11918.2 provides some standard loose-leaf pages" (see 8.1); ---Based on the actual test content, change 2A in 10.2 to 25A (see 10.2); ---Referring to the requirements for electrical strength testing in other electrical accessory standards, Notes 2, 3, and 4 (see 19.5) have been added to 19.5 to adapt to... Given my country's technological capabilities, this increases operability; ---The temperature rise test now includes the requirement that "temperature be measured using melting particles, color-changing indicators, or thermocouples; these measuring instruments should be selected and properly placed..." The effect of the placement on the measured temperature is negligible (see Chapter 22), in order to adapt to my country's technical conditions and increase operability; ---Based on the actual test content, the heading of section 23.3 is changed to "Tension and Moment Tests" (see 23.3); ---Based on the actual test content, a new heading, "Insulating Caps," has been added (see 24.7); ---Based on the actual test content, "PTI" should be changed to "CTI" (see 27.3); ---The order of two figures in Figure A.4 has been changed to suit my country's technical conditions and increase operability; ---IEC 60884-1.2002 has been replaced with GB/T 2099.1-2021 (referenced in reference material) to adapt to my country's technical conditions, and [further details are needed]. Operability; ---IEC 60050-195.1998 has been replaced with GB/T 2900.73-2008 (referenced in reference material) to adapt to my country's technical conditions, and [further details omitted]. Increase operability; ---IEC 60998-2-2 has been replaced with GB/T 13140.3 (referenced in the literature) to adapt to my country's technical conditions and increase operability. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Technical Committee on Standardization of Electrical Accessories (SAC/TC67). This document was drafted by. China Electric Power Research Institute Co., Ltd., China Automotive Technology and Research Center Co., Ltd., and the Ministry of Transport. Ministry of Transport Research Institute, Bull Group Corporation, Manex Industrial Electric (China) Co., Ltd., Guangdong Weipu Electric Co., Ltd. Company, Hangzhou Hongyan Electric Co., Ltd., Weikai Testing Technology Co., Ltd., Jiangsu Xinlian Intelligent Technology Research Co., Ltd., Taizhou Baoluda Electric Technology Co., Ltd., Xiamen Weien Electric Co., Ltd., Jiangsu Jianlong Electric Co., Ltd., Shantou Kerun Electromechanical Equipment Co., Ltd., and Breakthrough Electric... Gas (Tianjin) Co., Ltd., Jiangsu Tongling Technology Co., Ltd., Bosuo Technology (Jiangxi) Co., Ltd., NARI Technology Co., Ltd. China Quality Certification Center Co., Ltd., Jiaxing Weikai Testing Technology Co., Ltd., Wenzhou Chint Smart Home Technology Co., Ltd., Guangdong Open University, Hefei Weijing Electric Co., Ltd., Zhejiang Delixi International Electric Co., Ltd., Zhejiang Jirun Automobile Co., Ltd., Zhejiang Zhongxun Electronics Co., Ltd. Limited Liability Company, Zhejiang Shangman Electric Technology Co., Ltd., Ningbo Yilanke Electric Co., Ltd., Zhongren Shangdong (Shanghai) Testing Technology Co., Ltd. Yueqing Rongsheng Electric Appliance Co., Ltd., Yueqing Jinlong Electronic Industry Co., Ltd., Jinmao Power Holding Co., Ltd., Zhejiang Yuehua Telecommunications Limited Liability Company, Zhangzhou Hetai Electric Light Source Technology Co., Ltd., Wenzhou Jinhong Electric Co., Ltd., Shenzhen Lingke Electric Co., Ltd., and Kedu Electric Joint-stock limited company. The main drafters of this document are. Gu Zebo, Cai Jun, Xu Xiao, Liu Yang, Yang Rui, Zhang Weijun, Wang Yue, Chen Zanhui, Yao Zhiguo, Cheng Xiangdong, and Yu Mingfeng. Liu Yuanyuan, Xiong Honghuang, Huang Yibin, Ding Liang, Zhao Yi, Yan Hua, Peng Jianwen, He Shengli, Xu Qian, Liu Shuiqiang, Zhang Mei, Shu Meijun, He Anmin, Meng Yongchang Sun Liangzhong, Wang Longjun, Xu Zengyu, Chen Ping, Sun Ting, Chen Kai, Wu Jinlong, Wu Jizhen, Wang Sheng, Zhang Wupeng, Fang Chenguang, Lin Shunhua, Wang Jiaojiao, Jiang Hua, Lin Haiqing, Chen Heng, and Li Ziping. The release history of this document and the document it replaces is as follows. ---First published in 1989 as GB/T 11918-1989, revised for the first time in.2001; ---The second revision was carried out in.2014, and the standard number was adjusted to GB/T 11918.1-2014; ---This is the third revision.

Introduction

GB/T 11918 aims to standardize the types and dimensions of plugs, fixed or mobile sockets, and appliance input sockets used in industrial applications. To ensure product safety, it is proposed to consist of the following parts. ---Industrial plugs, fixed or portable sockets and appliance input sockets - Part 1.General requirements. The purpose is to specify industrial... The general technical requirements for the structure, mechanical properties, and electrical properties of plugs, fixed or movable sockets and appliance input sockets. ---Industrial plugs, fixed or mobile sockets and appliance input sockets Part 2.Dimensions of electrical accessories with pins and sockets Size compatibility requirements. The aim is to provide specifications for industrial plugs, fixed or mobile sockets and appliances with a rated current not exceeding 125A. Size compatibility requirements for input sockets. ---Industrial plugs, fixed or mobile sockets and appliance input sockets, Part 3.(Leave blank for later documents). ---Industrial plugs, fixed or portable sockets and appliance input sockets - Part 4.Sockets with or without interlocking switches. The purpose is to provide information on electric shock protection, interlocking, switches and their components, structure, and mechanics for industrial sockets with or without interlocks and switches. Technical requirements such as strength and electrical performance. ---Industrial plugs, sockets and couplers, Part 5.Plugs, sockets and marine couplings for low-voltage shore power connection systems (LVSC systems) Size compatibility and interchangeability requirements for connectors and marine input sockets. The aim is to reduce air pollutant emissions from ships berthing in port. Promote the use of shore power by ships when berthing, cooperate with the construction of port shore power facilities, and ensure compliance with IEC /PAS80005-3.2014 regarding plug-in... Requirements for heads, sockets, and marine couplers (marine connectors and marine input sockets), and the application status of shore power facilities in my country. To promote interchangeability and compatibility between ships and low-voltage shore power facilities, plugs and sockets for low-voltage shore power connection systems (LVSC systems) should be provided. Marine connectors and marine input sockets have explicit requirements for size compatibility and interchangeability. ---Industrial plugs, sockets, and couplers - Part 6.DC plugs, sockets, and connectors for marine shore power systems. The aim is to reduce... Shorten the charging time of ships at port, improve charging efficiency, promote the standardized and widespread application of DC charging in ship shore power systems, and cooperate with port authorities. The construction of port power facilities and the electrification retrofitting of ships promote the interchangeability and compatibility of ships and low-voltage shore power facilities, thus benefiting ship shore power. Safety technical requirements and size compatibility and interchangeability requirements are put forward for DC plugs, sockets, connectors and other components used in the connection system. This document will facilitate the standardization of universal safety requirements for plugs, fixed or portable sockets, and appliance input sockets used in industrial settings. Improve product quality and ensure product safety. Industrial plugs, fixed or mobile sockets and Appliance Input Sockets Part 1.General Requirements

1 Scope

This document specifies the structure, mechanism, and design of industrial plugs, fixed or mobile sockets, and appliance input sockets (hereinafter referred to as "electrical accessories"). Technical requirements such as mechanical performance and electrical performance. This document applies to products primarily intended for industrial use, both indoors and outdoors, with a rated operating voltage not exceeding 1000VDC or 1000V. AC electrical accessories with a frequency not exceeding 500Hz and a rated current not exceeding 800A. These electrical accessories are intended to be installed only by trained personnel or skilled technicians. The listed preferred ratings are not intended to exclude other ratings. This document applies to electrical accessories used in environments where the ambient temperature is typically between -25°C and 40°C. These electrical accessories are intended to be connected only to copper or copper alloy cables. This document applies to series I with a rated current not exceeding 32A and series II with a rated current not exceeding 30A, equipped with unthreaded terminals or Electrical accessories with insulating piercing terminals. It cannot be ruled out that these electrical accessories may be used on construction sites, or for agricultural, commercial, or household purposes. Fixed sockets or appliance input sockets installed in or fixed to electrical equipment are within the scope of this document. It is also applicable to electrical accessories intended for use in extra-low voltage devices. This document does not apply to electrical accessories primarily used in homes or similar general purposes. This document does not include single-pole electrical accessories. In special locations, such as on a ship or in places prone to explosion, additional requirements may be required.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 2423.3 Environmental testing – Part 2.Test methods – Test Cab. Constant damp heat test (GB/T 2423.3-2016) IEC 60068-2-78.2012, IDT GB/T 2423.22 Environmental testing—Part 2.Test methods—Test N. Temperature change (GB/T 2423.22-2012) IEC 60068-2-14.2009, IDT GB/T 3956-2008 Conductors of cables (IEC 60228.2004, IDT) GB/T 4207 Determination of Tracking Resistance Index and Comparative Tracking Index of Solid Insulating Materials (GB/T 4207-2022) IEC 60112.2020, IDT GB/T 4208-2017 Degrees of protection provided by enclosures (IP code) (IEC 60529.2013, IDT) GB/T 5013.4-2008 Rubber-insulated cables with rated voltage of 450/750V and below - Part 4.Flexible wires and flexible cables (IEC 60245-4.2004, IDT) GB/T 5023 (all parts) Polyvinyl chloride insulated cables with rated voltage of 450/750V and below [IEC 60227 (all parts)] Note. GB/T 5023.1-2008 Polyvinyl chloride insulated cables with rated voltage of 450/750V and below - Part 1.General requirements (IEC 60227-1. 2007, IDT) ...