What are the standards for wiring harnesses?

1, Definition of wiring harness standards
Wire harness standards refer to a series of technical requirements and specifications developed to standardize the design, manufacturing, testing, installation, and use of wire harnesses. These standards aim to ensure that the performance of the wiring harness meets the requirements of specific application scenarios, while ensuring personnel safety, stable equipment operation, and environmental friendliness. Wire harness standards are usually developed and published by international standardization organizations, national standardization bodies, industry associations, or enterprises based on their own needs.
2, Classification of wire harness standards
The wire harness standards can be classified according to different dimensions, mainly including the following aspects:
International and national standards: such as ISO (International Organization for Standardization), IEC (International Electrotechnical Commission), ASTM (American Society for Testing and Materials), UL (Underwriters Laboratories) and other international standards, as well as national standards developed by countries according to their own actual situations, such as China's GB/T series standards.
Industry standards: Standards developed by specific industry associations or organizations, such as SAE (Society of Automotive Engineers) standards for the automotive industry, ITU (International Telecommunication Union) standards for the communication industry, etc. These standards are usually customized for the characteristics and needs of specific industries.
Enterprise standards: Standards developed within an enterprise to meet its own product development and production needs. Enterprise standards may be supplemented or modified based on international standards, national standards, or industry standards to better adapt to the actual situation of the enterprise.
Functional standards: Classify according to the function of the wiring harness, such as power harness standards, signal harness standards, waterproof harness standards, etc. These standards focus on the performance requirements and testing methods of wiring harnesses under specific functions.
3, Key elements of wire harness standards
Material standard: The materials of the wire harness include wires, insulation layers, sheaths, connectors, etc. The material standards specify the materials, specifications, performance requirements, etc. of these components to ensure the electrical performance, mechanical performance, and environmental adaptability of the wiring harness.
Design and layout standards: The design and layout of wiring harnesses directly affect their performance and usability. The standard usually includes the selection of wire cross-sectional area, color coding specifications, bundling methods, protection level requirements, etc., to ensure the reliability, maintainability, and aesthetics of the wire harness.
Manufacturing process standards: Manufacturing process standards cover various aspects of the wire harness production process, such as wire cutting, stripping, crimping, welding, injection molding, etc. These standards specify process parameters, operating procedures, quality control requirements, etc. to ensure the manufacturing quality of wire harnesses.
Testing and Inspection Standards: The wiring harness must undergo a series of strict tests and inspections before leaving the factory to ensure that its performance meets the standard requirements. Testing and inspection standards include electrical performance testing (such as insulation resistance, withstand voltage testing), mechanical performance testing (such as tensile testing, bending testing), environmental adaptability testing (such as temperature cycling, humidity testing), etc.
Identification and documentation standards: The identification and documentation of wiring harnesses are important means of ensuring their traceability and maintainability. The standard usually specifies the identification method, label content, and user manual writing requirements for wiring harnesses, in order to facilitate users' correct installation, use, and maintenance of wiring harnesses.