What are the standards and requirements for network cables used in the United States?

　　Network cables used in the United States need to meet a series of standards and requirements, which are usually established by relevant agencies or industry organizations in the United States to ensure the performance, security and compatibility of network cables. Here is a detailed analysis of the standards and requirements of network cables in the United States:

　　Electromagnetic compatibility (EMC) and radio frequency (RF) radiation standards

　　FCC certification:

　　Network cables (such as Ethernet cables) in the United States need to pass through the Federal Communications Commission. Certified by the FCC to ensure compliance with U.S. electromagnetic compatibility (EMC) and radio frequency (RF) radiation standards.

　　FCC certification is a mandatory requirement for market access in the United States and applies to all electronic devices that may generate radio frequency interference.

　　The network cable itself usually does not require FCC certification, but if the network cable is used in combination with other devices (such as those with PoE capabilities) and may generate electromagnetic interference, FCC certification may be required.

　　II. Physical characteristics and performance standards

　　AWG standard:

　　AWG stands for American wire gauge. The SMaller the value, the larger the wire diameter, the smaller the resistance, and the smaller the voltage drop, making it suitable for long-distance transmission.

　　The AWG specification of the cable affects its transmission performance and stability. For example, a 23AWG cable can achieve Category 6 performance within 90 meters, while a 26AWG cable can only achieve it within 60 meters.

　　Transfer speed and bandwidth:

　　The transmission speed and bandwidth of the network cable are one of its key performance indicators.

　　With the continuous development of network technology, the requirements for cable transmission speed and bandwidth are also increasing.

　　In the United States, common cable types include Cat5e, Cat6, Cat6a, etc., which support different transmission speeds and bandwidths.

　　Impedance and attenuation:

　　The impedance and attenuation of the network cable are also important performance indicators.

　　Impedance refers to the resistance of a network cable to current, while attenuation refers to the loss of a signal as it travels through a network cable.

　　A high-quality cable should have low impedance and attenuation to ensure stable signal transmission.

　　III. Safety and environmental requirements

　　Flame retardancy:

　　The network cable needs to have a certain degree of flame retardancy to prevent greater losses in the event of an accident such as a fire.

　　In the United States, some specific application scenarios (e.g. data centers, high-rise buildings, etc.) have higher requirements for the flame retardancy of network cables.

　　Environmentally friendly materials:

　　With the increasing awareness of environmental protection, more and more network cables are being manufactured with environmentally friendly materials.

　　These environmentally friendly materials are not only environmentally friendly, but also enhance the durability and stability of the cable.

　　IV. Other requirements

　　Brand selection:

　　When purchasing a network cable, choose well-known brands and high-quality products.

　　Some brands pass authoritative certifications such as Fluke tests to ensure the quality and performance of their products.

　　Collocation and Compatibility:

　　The network cable should be used with accessories such as crystal heads and panels to ensure compatibility between them.

　　When selecting a network cable, it is necessary to consider its compatibility with other devices and systems to ensure the stable operation of the network.

　　In summary, the network cable used in the United States needs to meet a series of standards and requirements, including electromagnetic compatibility, physical characteristics and performance standards, safety and environmental protection requirements, and other requirements. When purchasing and using network cables, you should carefully understand these standards and requirements to ensure that the quality and performance of network cables meet actual needs.