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Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part 2: Dimensional compatibility requirements for pin and contact-tube accessories
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GB/T 11918.2-2025
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| GB/T 11918.2-2014 | English | 155 |
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Plugs, socket-outlets and couplers for industrial purposes -- Part 2: Dimensional compatibility and interchangeability requirements for pin and contact-tube accessories
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GB/T 11918.2-2014
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Basic data | Standard ID | GB/T 11918.2-2025 (GB/T11918.2-2025) | | Description (Translated English) | Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part 2: Dimensional compatibility requirements for pin and contact-tube accessories | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K30 | | Classification of International Standard | 29.120.30 | | Word Count Estimation | 74,742 | | Date of Issue | 2025-10-05 | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 11918.2-2014 | | Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China | GB/T 11918.2-2025: Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part 2: Dimensional compatibility requirements for pin and contact-tube accessories
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 29.120.30
CCSK30
National Standards of the People's Republic of China
Replaces GB/T 11918.2-2014
Industrial plugs, fixed or portable sockets and appliances
Input sockets, Part 2.Electrical sockets with pins and sockets
Size compatibility requirements for accessories
(IEC 60309-2.2021, MOD)
Released on October 5, 2025; to be implemented on May 1, 2026.
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface V
Introduction VII
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.General Requirements 2
5 Standard Ratings 2
6 categories 3
7.Mark 3
8 Dimensions 5
9.Protection against electric shock 23
10 Grounding measures 24
11 Terminals and connectors 24
12 interlocking 25
13.Aging resistance of rubber and thermoplastic materials 25
14 Structure 25
15.Structure of a fixed socket 27
16.Structure of plugs and removable sockets 28
17 Structure of appliance input sockets 28
Protection level 28
19 Insulation resistance and electrical strength 29
20 breaking ability 29
21 Normal operation 29
22°C temperature rise 29°C
23 Flexible cables and their connections 29
24 Mechanical strength 30
25 Screws, current-carrying components and connectors 30
26 Creepage distance, clearance, and sealant penetration distance 30
27 Heat resistant, flame retardant and electrical tracking resistant 30
28 Corrosion resistance and rust prevention 30
29 Short-circuit current withstand test 30
30 Electromagnetic compatibility 30
References 64
Figure.201 Check the dimensions of 16/20A, 32/30A, 63/60A, and 125/100A sockets with rated operating voltages exceeding 50V.
General specifications for d1, d2, and l1 (10)
Figure 202 Check the dimensions of 16/20A, 32/30A, 63/60A, and 125/100A sockets with rated operating voltages exceeding 50V.
Stop gauges 11 for d1 and d2
Figure 203 Inspect 16/20A, 32/30A, 63/60A and 125/100A plugs and appliances with a rated operating voltage exceeding 50V.
The input socket dimensions d2, d4 and l1 are specified in the standard gauge 12.
Figure 204 Inspect 16/20A, 32/30A, 63/60A and 125/100A plugs and appliances with a rated operating voltage exceeding 50V.
Input socket dimensions d2, d4, stop gauge 13
Figure 205 Gauge 14 for checking the compatibility of 16/20A and 32/30A sockets with a rated operating voltage not exceeding 50V.
Figure 206 Check the compatibility of 16/20A and 32/30A plugs and appliance input sockets with a rated operating voltage not exceeding 50V.
Gauge 15
Figure 207 Inspect 16/20A, 32/30A, 63/60A and 125/100A plugs and appliances with a rated operating voltage exceeding 50V.
Input socket stop gauge 16
Figure 208 Inspection of thermoplastic materials for 16/20A and 32/30A plugs and appliance input sockets with a rated operating voltage not exceeding 50V.
Gauge 17 for the stiffness of the casing under humid and warm conditions
Figure 209 Test apparatus for non-solid pins 18
Figure 210.Use a no-go gauge to check 16/20A, 32/30A, 63/60A, and 125/100A sockets with a rated operating voltage exceeding 50V.
Test setup 19
Figure 211 Gauges for inspecting 16/20A, 32/30A, 63/60A, and 125/100A sockets with rated operating voltages exceeding 50V.
Figure 212 Inspecting the thermoplastic housing of 16/20A and 32/30A sockets with a rated operating voltage not exceeding 50V in a humid environment.
Stiffness gauge under warm conditions 21
Figure 213 Gauge 22 for inspecting phase wire holes
Figure 214 Experiment 22 of phase wire hole
Figure 215 shows an inspection of sockets where it is impossible to insert a single pole of a 10/16A 250V two-prong plug into a receptacle with a flexible or thermoplastic housing.
Gauge 23
Figure 216 Example 26 of a device for checking pull-out force
Table.201 Rated Current 3
Table 202 Series I Marking Examples 3
Table 203 Examples of Series II Markings 4
Table 204 Electrical accessories with a rated operating voltage exceeding 50V 5
Table 205 Electrical Accessories with Rated Operating Voltage Not Exceeding 50V 6
Table 206 Holding Device 6
Table 207 Forces acting on go gauges and no-go gauges 7
Table 208 General Purpose Electrical Accessories with Rated Voltage Not Exceeding 50V 7
Table 209 Special Electrical Accessories with Rated Voltage Not Exceeding 50V 8
Table 210 Grounding Contact Locations 8
Table 211 Test Force 16
Table 212 Maximum displacement of the gauge 19
Table 3 Connecting conductor dimensions 24
Table 213 Test force on terminals 24
Table 214 Test plug pin diameter 25
Table 215 Maximum Pull-out Force 26
Table 216 Pull-out force 27
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 2 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 replaces GB/T 11918.2-2014 "Industrial plugs, sockets and couplers - Part 2.Electrical appliances with pins and sockets".
The "Requirements for Dimensional Compatibility and Interchangeability of Parts" differs from GB/T 11918.2-2014 in that, apart from structural adjustments and editorial changes, the main technical aspects are...
The changes are as follows.
---Added a definition for solid pins (see 3.202);
---Added IP codes (see 5.201), providing information on the mechanical interlocking mechanisms, plugs, and appliance input sockets corresponding to the new IP codes.
Standard loose-leaf (see Standard Loose-leaf 2-V, 2-IX, 2-IXa);
---The classification method has been changed (see 6.2, Chapter 6 of the.2014 edition);
---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).
---Added dimensional requirements for non-solid pins (see 8.2.2.3, 8.2.2.4);
---The requirement for "threaded terminals defined by terminal size" has been removed (see 11.101 in the.2014 edition), along with the corresponding standard leaflet.
(See the.2014 edition of standard loose-leaf pages 2-X, 2-XI, 2-XII, and 2-VIII);
---Added the requirement that sockets should undergo breaking capacity testing using solid pins, and that plugs and appliance input sockets with solid pins should not...
Instructions for conducting the breaking capacity test (see Chapter 20);
---Added instructions regarding not performing normal operation tests on plugs and appliance input sockets with solid pins (see Chapter 21);
---The list of chapters requiring repeated trials has been removed (see Appendix A of the.2014 edition).
This document is modified to adopt IEC 60309-2.2021 "Industrial plugs, fixed or mobile sockets and appliance input sockets - Part 2"
Section. Size compatibility requirements for electrical accessories with pins and sockets.
The technical differences between this document and IEC 60309-2.2021, and the reasons therefor, are as follows.
---Added. "This document specifies the dimensions of industrial plugs with pins and sockets, fixed or mobile sockets, and appliance input sockets."
Technical requirements such as inch compatibility requirements (see Chapter 1) shall be met to comply with the requirements of GB/T 1.1-2020;
---IEC 60309-1.2021 (see Chapters 2-30) has been replaced with the normatively referenced GB/T 11918.1-2025 to conform to [the relevant standard].
To improve operability and suitability for my country's technological conditions;
---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 60364-4-41 (see 8.1) has been replaced with the normatively referenced GB/T 16895.21 to adapt to my country's technical conditions and add...
Operability.
The following editorial changes have been made to this document.
---The representation of surface roughness in section 4.201 has been modified to better suit my country's technological conditions and increase operability;
---Based on the actual correspondence, Tables 206, 207, and 208 in 8.6 are revised to Tables 208, 209, and 210, respectively;
---Based on the actual correspondence, change Figure 210 in 8.2.3.1 to Figure 211, and change the first Figure 211 in 8.2.3.2 to...
Figure 210 and Table 209 are changed to Table 211.
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. VKC Certification & Testing Co., Ltd., Hangzhou Hongyan Electric Co., Ltd., and Mannecos Industrial Electric (China) Co., Ltd.
The company, Jiangsu Tongling Technology Co., Ltd., Guangdong Weipu Electric Co., Ltd., Water Transport Research Institute of the Ministry of Transport, and Taizhou Baoluda Electric Technology Co., Ltd.
Technology Co., Ltd., Jiangsu Jianlong Electric Co., Ltd., China Electric Power Research Institute Co., Ltd., Bull Group Co., Ltd., China
Quality Certification Center Co., Ltd., Boson Technology (Jiangxi) Co., Ltd., Shenzhen Yonggui Technology Co., Ltd., Jiaxing Weikai Testing Technology Co., Ltd.
Company, Xiamen Weien Electric Co., Ltd., Guangdong Open University, Breakthrough Electric (Tianjin) Co., Ltd., Hefei Weijing Electric Co., Ltd., Guangzhou Gong
Cheng Technical Vocational College, Zhejiang Delixi International Electric Co., Ltd., Wenzhou Chint Smart Home Technology Co., Ltd., and NARI Technology Co., Ltd.
Limited Liability Company, Zhejiang Shangman Electric Technology Co., Ltd., Wenzhou Institute of Quality and Technical Testing, China Certification & Inspection Group (Shanghai) Testing Technology Co., Ltd.
Limited Liability Company, Shenzhen Toplink Technology Co., Ltd., Yueqing Rongsheng Imported Electric Appliance Co., Ltd., Zhejiang Yuehua Telecommunications Co., Ltd.
Guangxi Fuhong Technology Co., Ltd.
The main drafters of this document are. Cai Jun, Yao Zhiguo, Wang Yue, Yan Hua, Chen Zanhui, Yang Rui, Liu Yuanyuan, Liu Yang, Yu Mingfeng, Huang Yibin, and Zhang Weijun.
Liu Shuiqiang, Liu Qi, Shu Meijun, Zhao Yi, Peng Jianwen, Fei Ping, Xu Qian, Li Jin, Xiong Honghuang, He Jian, Wang Zhiyan, He Shengli, Wang Longjun, Chen Jixuan
Wu Min, Chen Ping, Xiao Lan, Chen Kai, Wang Sheng, Cai Chengmiao, Liu Dazhuang, Jiang Hua, Chen Heng, Lin Haiqing.
The release history of this document and the document it replaces is as follows.
---First published in 1989 as GB/T 11919-1989, revised for the first time in.2001;
---The second revision was carried out in.2014, and the standard number was adjusted to GB/T 11918.2-2014;
---This is the third revision.
Introduction
GB/T 11918 aims to standardize the types and sizes of plugs, fixed or mobile sockets, and appliance input sockets used in industrial applications.
To ensure product safety, the dimensions are to be determined and the product 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 berthing in port, cooperate with the construction of port shore power facilities, and ensure compliance with IEC /PAS80005-3.2014 regarding...
Requirements for plugs, sockets, and marine couplers (marine connectors and marine input sockets), and the application of shore power facilities in my country.
Furthermore, to promote interchangeability and compatibility between ships and low-voltage shore power facilities, plugs and sockets are used in low-voltage shore power connection systems (LVSC systems).
The requirements for size compatibility and interchangeability are clearly defined for marine connectors and marine input sockets.
---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 plugs with pins and sockets used in industrial applications with a rated current not exceeding 125A, whether fixed or mobile.
The types and dimensions of movable sockets and appliance input sockets improve product size compatibility and ensure that the products are compatible with all types of devices.
Industrial plugs, fixed or portable sockets and appliances
Input sockets, Part 2.Electrical sockets with pins and sockets
Size compatibility requirements for accessories
1 Scope
This document specifies the dimensional compatibility requirements for industrial plugs with pins and sockets, fixed or mobile sockets, and appliance input sockets.
Technical requirements, etc.
This document applies to products primarily intended for industrial use, indoor or outdoor, with a rated operating voltage not exceeding 1000VDC or 1000V.
AC plugs, fixed or mobile sockets and appliance input sockets with a frequency not exceeding 500Hz and a rated current not exceeding 125A.
These electrical accessories are intended to be installed and used only by trained personnel or skilled technicians.
Note 1.All contents of electrical accessories with a rated current exceeding 125A in GB/T 11918 do not apply to this document.
This document applies to electrical accessories with standard-structured latches and sockets.
This document applies to electrical accessories used in environments where the ambient temperature is typically between -25°C and 40°C.
The possibility of using these electrical accessories in construction sites, agriculture, commerce, and household use cannot be ruled out.
This document applies to series I products with unthreaded terminals or insulated piercing terminals, and rated current not exceeding 32A, and series II products with rated current not exceeding 32A.
Electrical accessories with a current of no more than 30A.
Sockets or appliance input sockets installed in or fixed to electrical equipment fall within the scope of this document. This document also applies to
Electrical accessories in extra-low voltage devices.
Note 2.This document does not apply to household and similar general-purpose electrical accessories.
In special locations, such as on a ship or in places prone to explosion, there may be additional requirements.
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 11918.1-2025 Industrial plugs, fixed or mobile sockets and appliance input sockets – Part 1.General requirements
This chapter of (IEC 60309-1.2021, MOD) applies with the following modifications.
Increase.
GB/T 11918.1-2025 Industrial plugs, fixed or mobile sockets and appliance input sockets – Part 1.General requirements
(IEC 60309-1.2021, MOD)
GB/T 16895.21 Low-voltage electrical installations – Part 4-41.Safety protection against electric shock (GB/T 16895.21-2020)
IEC 60364-4-41.2017, IDT
3 Terms and Definitions
Chapter 3 of GB/T 11918.1-2025 is applicable after the following modifications.
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GB/T 11918.2-2025: Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part 2: Dimensional compatibility requirements for pin and contact-tube accessories
Status: Valid
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