1. The cable specification and model number are written on the insulation cover of each cable, so you can first understand it through the insulation cover. 2. The cable specification model actually represents the number of cores and cross-sectional area of the cable, and is also a reference data...

The wire cross-sectional area algorithm is as follows: The cross-sectional area of the cylindrical wire=3.14*R*R.R is the radius of the wire. For example, a wire with a diameter of 2MM has a cross-sectional area=3.14*1*1=3.14 square millimeters. Cross-sectional area of cuboid wire = height *...

4. Multiple Listing, Multiple Accreditation or Multiple Rating Services: When a UL applicant obtains the above-mentioned listing, accreditation or grading services, and its products are produced in the name of another company to meet the needs of sales, it can apply for multiple listing,...

The types of UL's product certification and testing services can be divided into listing, accreditation and classification. 1. LISTED: In general, listing only applies to complete products and various components and devices that are replaced or installed in the field by qualified personnel....

UL is mainly engaged in product safety certification and operating safety certification business. Its ultimate goal is to obtain products with a relatively safe level for the market, and to contribute to the assurance of personal health and property safety. In terms of product safety...

A wire and cable used to connect security surveillance cameras and real terminals (computers or monitors, etc.) Surveillance video cable is a wire and cable used to connect security surveillance cameras and real terminals (computers or monitors, etc.), and its function is to transmit image data...

With the development of high-definition video networks, the development and application of 12G-SDI has brought people a new visual experience, but many friends do not know what 12G-SDI is, so let me popularize it for everyone. 12G-SDI is a transmission for 2160p*60p (commonly known as true 4K)...

A new performance evaluation index has been determined for Category 6 cables. The single-core bare copper with a specification of 23AWG is used as the conductor, the polyethylene polymer material is used as the insulator, and the outer skin material is made of flame retardant polymer material,...

SDI is an acronym for serial digital interface, a digital video interface standard developed by the SMPTE (Society of Motion Picture and Television Engineers) organization, which has been widely adopted by many industries for Transmission of uncompressed, unencrypted digital video signals....

The most direct reason for the low service life of the cable is the breakdown of the insulation reduction. There are many factors that reduce the insulation of the guide-sensitive cable. According to the actual operation experience, it can be divided into the following situations: 1. External...

Cryolite (Na3AlF6) and alumina (Al2O3). 1. The main principle is the Hall-Elu aluminum electrolysis method: using pure alumina as raw material to make aluminum by electrolysis, because pure alumina has a high melting point (about 2045 ° C), it is difficult to melt, so molten aluminum is used in...

Difference Between Fiber Optic and Cable

Development trend of wire and cable industry 1. Steady economic growth and the implementation of major national strategies promote the continuous development of the wire and cable industry One of the six "new" goals of economic and social development during the "14th Five-Year...

Wire and cable market status 1. Wire and cable market size In recent years, with the steady growth of the domestic economy and the continuous advancement of industrialization and urbanization, industries such as electric power, petroleum, chemical industry, urban rail transit, automobiles,...

Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications, and are telecommunication cable assemblies that utilize one or more optical fibers in a sheathing as the transmission medium and can be used individually or in groups. Optical cables are...

When the copper surface is just cut, it is red-orange with metallic luster, and the element is purple-red. Copper salts are the most common copper compounds. Their hydrated ions are usually blue, while the chloride ligands are green. They are the source of the color of minerals such as blue...

There are not only many types of wire and cable products, but also many types of conductors. The following 7 types are commonly used: Conductor, wire: An element in a cable that has the specific function of conducting current. Solid Conductor, Solid Conductor: A conductor made of a single round...

Category 7 Cat7 cable, which can achieve higher transmission performance than previous Ethernet standards. This twisted pair is fully shielded, so it can also be called shielded twisted pair (SSTP) or shielded twisted pair (SFTP) wiring. Alien crosstalk interference is completely eliminated,...

Ethernet is the most common type of computer network in the real world. There are two types of Ethernet: the first is classic Ethernet, and the second is switched Ethernet, which uses a device called a switch to connect different computers. Classic Ethernet is the original form of Ethernet,...

The advantages of TPE cable material compared with ordinary cable material are as follows: Material selection: replace PVC and traditional vulcanized rubber with high-performance TPE, TPE has soft touch, high elasticity, mild texture, adjustable surface gloss and brightness, low smoke,...