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Road vehicles - Automotive cables - Part 7: Dimensions and requirements for 30 V a. c. or 60 V d. c. round, sheathed, screened or unscreened multi or single core copper conductor cables
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Basic data
| Standard ID | GB/T 25085.7-2026 (GB/T25085.7-2026) |
| Description (Translated English) | Road vehicles - Automotive cables - Part 7: Dimensions and requirements for 30 V a. c. or 60 V d. c. round, sheathed, screened or unscreened multi or single core copper conductor cables |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | T36 |
| Classification of International Standard | 43.040.10 |
| Word Count Estimation | 26,220 |
| Date of Issue | 2026-02-27 |
| Date of Implementation | 2026-09-01 |
| Older Standard (superseded by this standard) | GB/T 25087-2010 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 25085.7-2026: Road vehicles - Automotive cables - Part 7: Dimensions and requirements for 30 V a. c. or 60 V d. c. round, sheathed, screened or unscreened multi or single core copper conductor cables
---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 43.040.10
CCST36
National Standards of the People's Republic of China
Replaces GB/T 25087-2010
Road vehicle electrical cables, Part 7.
30V AC or 60V DC, round, sheathed
Shielded or unshielded, multi-core or single-core copper conductor
Cable dimensions and requirements
(ISO 19642-7.2019, IDT)
Released on February 27, 2026; to be implemented on September 1, 2026.
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction V
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4 General Requirements 2
4.1 General Test Conditions 2
4.2 Safety Precautions 2
4.3 Voltage Range 2
4.4 Temperature Rating 2
4.5 Conductor Materials 2
4.6 Conductor 2
4.7 Sheath thickness 2
4.8 Outer diameter of the wire core 2
4.9 Representative conductor specifications for the test 2
4.10 Test items and requirements according to GB/T 25085.2-2024 2
5.Technical requirements for a single cable core 4
6.Technical requirements for round, sheathed, shielded or unshielded, multi-core or single-core cables. 4.
6.1 General Requirements 4
6.2 Dimensional Inspection 5
6.3 Electrical performance test 5
6.4 Mechanical property test 6
6.5 Environmental Testing 6
Appendix A (Informative) Preferred Structure Dimensions 9
Appendix NA (Informative) Product Model List 15
References 16
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 7 of GB/T 25085 "Road Vehicle Cables". GB/T 25085 has already published the following parts.
---Part 1.Terminology and Design Guidelines;
---Part 2.Test Methods;
---Part 3.Dimensions and Requirements for Single-Core Copper Conductor Cables of 30V AC or 60V DC;
---Part 4.Dimensions and Requirements for Single-Core Aluminum Conductor Cables of 30V AC or 60V DC;
---Part 5.Dimensions and Specifications of Single-Core Copper Conductor Cables for AC 600V or DC 900V and AC 1000V or DC 1500V
Require;
---Part 6.Dimensions and Specifications of Single-Core Aluminum Conductor Cables for AC 600V or DC 900V and AC 1000V or DC 1500V
Require;
---Part 7.Dimensions and Specifications of 30V AC or 60V DC Round, Sheathed, Shielded or Unshielded, Multi-core or Single-core Copper Conductor Cables
Require;
---Part 8.Dimensions and Specifications of 30V AC or 60V DC Round, Sheathed, Shielded or Unshielded, Multi-core or Single-core Aluminum Conductor Cables
Require;
---Part 9.AC 600V or DC 900V and AC 1000V or DC 1500V Circular, Sheathed, Shielded or Unshielded
Dimensions and requirements for shielded, multi-core, or single-core copper conductor cables;
---Part 10.Circular, Sheathed, Shielded or Unshielded Types of AC 600V or DC 900V and AC 1000V or DC 1500V
Size and requirements for shielded, multi-core or single-core aluminum conductor cables.
This document replaces GB/T 25087-2010 "Road Vehicles Circular, Shielded and Unshielded 60V and 600V Multi-core Sheathed Electrical Units".
Compared with GB/T 25087-2010, the main technical changes in the "Cable" standard, apart from structural adjustments and editorial modifications, are as follows.
---All terms conform to GB/T 25085.1-2024 (see Chapter 3 and 4.4);
---All test methods conform to GB/T 25085.2-2024 (see 4.1, 4.10, Table 1 and 6.5.1);
---Added the requirement for "cable outer diameter during manufacturing" (see 6.2.4);
---The requirement for "surface transfer impedance (line injection method)" has been removed (see 6.3.3 of GB/T 25087-2010);
---Change "radiation attenuation" to "shielding attenuation---absorbing clamp method" (see 6.3.3.4, 6.3.5 of GB/T 25087-2010);
---A requirement for "flexibility" has been added (see 6.4.3);
---The requirement for "wear resistance" has been removed (see Chapter 9 of GB/T 25087-2010).
This document is equivalent to ISO 19642-7.2019 "Road vehicles - Automotive cables - Part 7.Circular cables - AC 30V or DC 60V".
Dimensions and requirements for copper conductor cables of various shapes, sheaths, shielded or unshielded types, and multi-core or single-core configurations.
The following minimal editorial changes have been made to this document.
---Based on the specific clauses cited in the text, ISO 19642-1 and ISO 19642-2 should be changed to include the date (see Chapter 3).
4.1, 4.4, 4.10, Table 1, 6.5.1 and Tables A.1 to A.6);
---The section "6.2.3.1 Purpose" in Table 1 has been deleted. This item appeared in Table 1 "Tests" of ISO 19642-7.2019 due to a typo.
The "6.2.3.1 Purpose" is meaningless;
---The footnote symbol 'e' in Table 1 of ISO 19642-9.2019 that was not explained has been deleted, and subsequent footnote symbols have been automatically moved to the front;
---Appendix NA (Informative) "List of Product Models" has been added to facilitate the use of this document.
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 Ministry of Industry and Information Technology of the People's Republic of China.
This document is under the jurisdiction of the National Automotive Standardization Technical Committee (SAC/TC114).
This document was drafted by. Shanghai Fuxin Cable Co., Ltd., Changsha Automotive Electrical Testing Center Co., Ltd., and BYD Automotive Engineering Co., Ltd.
Li Auto Technology Co., Ltd., Shanghai Li Auto Technology Co., Ltd., Great Wall Motor Co., Ltd., Zhejiang JK Automotive Research and Development Co., Ltd.
Guangzhou Automobile Group Co., Ltd., Chongqing Changan Automobile Co., Ltd., Dongfeng Motor Group Co., Ltd., and Xiaomi Automotive Technology Co., Ltd.
The company's Shanghai branch, Geely Automobile Research Institute (Ningbo) Co., Ltd., SAIC Motor Corporation Limited, and China FAW Group Corporation Limited
Limited Liability Company, Changchun Fuchs Automotive Wire Co., Ltd., Henan Tianhai Electric Co., Ltd., Chongqing Yufeng Technology Co., Ltd., Guangdong Mingji High-Tech Electric
Subsidiary company.
The main drafters of this document are. Wang Yadong, Huo Tianyu, Lu Xiaolong, Liu Siting, Chen Lingling, Xia Sanbao, Wu Chunfen, Chen Lingfeng, and Geng Weifeng.
Shen Zhimin, Yang Guoke, Gou Rongfei, Huang Yuhua, Ding Weixiang, Shi Hongwei, Bian Fanquan, Sun Yan, Wang Peng, Wang Zhiguang, Li Zhijun, Wang Chengfu.
The release history of this document and the document it replaces is as follows.
---First published in.2010 as GB/T 25087-2010;
Introduction
Automotive cables are an indispensable part of the electrical systems of road vehicles, undertaking the vital task of transmitting electrical energy, signals, and data.
The quality of automotive cables used in road vehicles directly affects the performance and safety of these vehicles. To ensure the quality of automotive cables used in road vehicles...
In terms of quantity, my country needs to establish a complete standard system for automotive cables used in road vehicles.
GB/T 25085 "Road Vehicle Cables" is proposed to consist of 12 parts.
---Part 1.Terminology and Design Guidelines. The purpose is to provide terminology and design guidelines related to automotive cables for road vehicles.
Other parts of GB/T 25085.
---Part 2.Test Methods. This section describes the test methods for automotive cables used in road vehicles, including tests for single-core cables.
Test methods for cables including sheaths and/or multi-core cables, as well as low-voltage and high-voltage cables and radio frequency data cables.
Experimental methods.
---Part 3.Dimensions and requirements for single-core copper conductor cables of 30V AC or 60V DC. The purpose is to specify the dimensions and requirements for cables used in road vehicles.
Performance requirements for low-voltage, single-core copper conductor automotive cables.
---Part 4.Dimensions and Requirements for 30V AC or 60V DC Single-Core Aluminum Conductor Cables. The purpose is to specify the dimensions and requirements for cables used in road vehicles.
Performance requirements for low-voltage, single-core aluminum conductor automotive cables.
---Part 5.Dimensions and Specifications of Single-Core Copper Conductor Cables for AC 600V or DC 900V and AC 1000V or DC 1500V
Requirements. The purpose is to specify the performance requirements for high-voltage, single-core copper conductor automotive cables used in road vehicles and electric vehicles.
---Part 6.Dimensions and Specifications of Single-Core Aluminum Conductor Cables for AC 600V or DC 900V and AC 1000V or DC 1500V
Requirements. The purpose is to specify the performance requirements for high-voltage, single-core aluminum conductor automotive cables used in road vehicles and electric vehicles.
---Part 7.Dimensions and Specifications of 30V AC or 60V DC Round, Sheathed, Shielded or Unshielded, Multi-core or Single-core Copper Conductor Cables
Requirements. The purpose is to specify the requirements for low-voltage automotive electrical systems used in road vehicles, using round, sheathed, shielded or unshielded, multi-core or single-core copper conductors.
Cable performance requirements.
---Part 8.Dimensions and Specifications of 30V AC or 60V DC Round, Sheathed, Shielded or Unshielded, Multi-core or Single-core Aluminum Conductor Cables
Requirements. The purpose is to specify low-voltage, round, sheathed, shielded or unshielded, multi-core or single-core aluminum conductor automotive electrical components for road vehicles.
Cable performance requirements.
---Part 9.AC 600V or DC 900V and AC 1000V or DC 1500V round, sheathed, shielded or unshielded
Dimensions and requirements for shielded, multi-core, or single-core copper conductor cables. The purpose is to specify the dimensions and requirements for high-voltage, round, shielded cables used in road vehicles and electric vehicles.
Performance requirements for sheathed, shielded or unshielded, multi-core or single-core copper conductor automotive cables.
---Part 10.Circular, Sheathed, Shielded or Unshielded Types of AC 600V or DC 900V and AC 1000V or DC 1500V
Dimensions and requirements for shielded, multi-core, or single-core aluminum conductor cables. The purpose is to specify the dimensions and requirements for high-voltage, round, shielded cables used in road vehicles and electric vehicles.
Performance requirements for sheathed, shielded or unshielded, multi-core or single-core aluminum conductor automotive cables.
---Part 11.Dimensions and requirements for coaxial RF cables with specific analog bandwidths up to 6 GHz (20 GHz). The purpose is to regulate...
Define the performance requirements for coaxial radio frequency automotive cables used in intelligent connected vehicles.
---Part 12.Dimensions and requirements for unshielded twisted-pair RF cables with specific analog bandwidths up to 1 GHz. The purpose is to specify...
Performance requirements for unshielded twisted-pair radio frequency automotive cables used in intelligent connected vehicles.
Road vehicle electrical cables, Part 7.
30V AC or 60V DC, round, sheathed
Shielded or unshielded, multi-core or single-core copper conductor
Cable dimensions and requirements
Warning. Use of this document may involve hazardous materials, operations, and equipment. This document is not intended to address any potential hazards associated with its use.
All safety issues are addressed in this document. Users are responsible for developing appropriate safety procedures and determining the applicability of regulatory restrictions before use.
1 Scope
This document specifies the dimensions of round, sheathed, multi-core, or single-core copper conductor cables with a nominal system voltage not exceeding AC 30V or DC 60V.
Size and requirements.
This document applies to sheathed multi-core or single-core cables for general-purpose road vehicles, and also to sheathed multi-core or single-core cables in...
Core wire.
Note. A list of commonly used cable models mentioned in this document can be found in Appendix NA.
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 25085.1-2024 Road Vehicle Cables - Part 1.Terminology and Design Guidelines (ISO 19642-1.2023)
IDT)
Note. There are no technical differences between the content referenced in ISO 19642-1.2023 and the content referenced in ISO 19642-1.2019.
GB/T 25085.2-2024 Road vehicles - Automotive cables - Part 2.Test methods (ISO 19642-2.2023, IDT)
Note. There are no technical differences between the content referenced in ISO 19642-2.2023 and the content referenced in ISO 19642-2.2019.
ISO 19642-3 Road Vehicles - Automotive Cables - Part 3.Dimensions and Specifications of Single-Core Copper Conductor Cables for AC 30V or DC 60V
Note. GB/T 25085.3-2020 Road Vehicle Cables - Part 3.Dimensions and Requirements of Single-Core Copper Conductor Cables for AC 30V or DC 60V
Seeking (ISO 19642-3.2019, IDT)
3 Terms and Definitions
The terms and definitions defined in GB/T 25085.1-2024 apply to this document.
The URLs for the terminology databases maintained by ISO and IEC for standardization are as follows.
...
