European standards for network cables
European countries have a strict and unified set of European standards (EN standards) for network cables (information technology comprehensive wiring). These standards are mainly formulated by the European Committee for Electrotechnical Standardization (CENELEC) and cover various aspects from system design, installation specifications, testing requirements to specific cable and connector specifications.
The following is an introduction to the core standards related to European network cables:

1. Integrated wiring system standards (EN 50173 series)
This is the most core IT wiring standard in Europe, which stipulates the architecture, performance and configuration requirements of the general wiring system, and is divided into several parts according to different application scenarios:
EN 50173-1: General requirements.
EN 50173-2: Office space wiring.
EN 50173-3: Industrial space wiring.
EN 50173-4: Home residential wiring (covering ICT and broadcast communication technologies).
EN 50173-5: Data center wiring.
EN 50173-6: Distributed building service wiring.
2. Installation and testing specifications
EN 50174 series: Specifically for wiring planning and installation. For example, Part 1 stipulates installation specifications and quality assurance, and Parts 2 and 3 respectively address the planning and practice of installation in buildings and outdoors.
EN 50346: Specifically for the testing requirements of installed wiring, ensuring that the construction quality meets the standards.
3. Cable and connector specification standards (EN 50288 and EN 60603 series)
European standards define the specific physical specifications, frequency bandwidth and connectors of various network cables:
EN 50288 series: Defines the specifications of multi-core metal communication cables. For example, Cat 6 (250 MHz), Cat 6A (500 MHz), Cat 7 (600 MHz), Cat 7A (1000 MHz), and Cat 8 (2000 MHz) cables with shielding and non-shielding specifications are all detailedly specified in this standard.
EN 60603 series: Specifies electronic device connectors (such as common RJ45 connectors and multimedia connectors), and stipulates corresponding connector standards for different types of network cables (such as Cat 5 to Cat 8).
4. Optical fibers and broadband network standards
In addition to traditional copper cable network cables, Europe has also formulated standards for optical fibers and broadband access:
EN 60794 series: Specifies the general norms, types and testing procedures of optical cables.
EN 50700: Wiring standard for building distribution access networks (PDAN) supporting optical fiber broadband networks (such as FTTH and FTTB).
5. Grounding, data centers and other related standards

EN 50310: Specifically for grounding and equipotential connection (Bonding) specifications in IT networks.
EN 50600 series: Covers all aspects of data centers, where Part 2-4 specifically address telecommunications wiring infrastructure.
Overall, the European country's network cable standard system is very complete, not only stipulating the physical performance of network cables (such as bandwidth, shielding), but also setting strict regulatory requirements for the design, construction, testing and supporting infrastructure (such as grounding, data center environment) of the entire wiring project.