At present, there is no corresponding national standard definition for fireproof cables in the country. The cable industry is used to refer to cables with certain fireproof performance such as flame-retardant cables, fire-resistant cables, and mineral-insulated non-combustible cables as fire-resista... READ MORE
XLPEDue to the above-mentioned twisted pair characteristics, when the microphone cable is welded with the corresponding Canon connector, the twisted pair will cross at 2.3 feet, which is easy to cause the plastic to melt during welding and cause a short circuit. Therefore, some manufacturers have in... READ MORE
The DC standard resistance of the cable can be calculated according to the following formula:R20=ρ20(1+K1)(1+K2)/∏/4×dn×10In the formula: R20——the branch current standard resistance of the cable at 20℃ (Ω/km)ρ20——The resistivity of the wire (at 20℃) (Ω*mm/km)d——diameter of each core wire (mm)n——the ... READ MORE
Composition and OrderThe model composition and sequence of wires and cables are as follows:1: Category, use][2: Conductor][3: Insulation][4: inner sheath][5: Structural features][6: outer sheath or derivative][7: Using Features]Items 1-5 and 7 are represented by pinyin letters, polymer materials are... READ MORE
3. DC resistanceThe DC loop resistance consumes part of the signal and converts it into heat. It refers to the sum of the resistance of a pair of wires. The DC resistance of the 11801 twisted pair must not be greater than 19.2 ohms. The difference between each pair should not be too large (less than... READ MORE
For twisted-pair cables, users are most concerned about several indicators that characterize its performance. These indicators include attenuation, near-end crosstalk, impedance characteristics, distributed capacitance, DC resistance, etc.1. AttenuationAttenuation is a measure of signal loss along t... READ MORE
The following introduces the most basic method of making straight-through Category 5 cables. The methods of making other types of network cables are similar. The only difference is that the jumper method is different.Step 1: Use twisted pair network cable pliers (of course, you can also use other cu... READ MORE
5) Category 5 cable (CAT5): This type of cable has increased winding density and a high-quality insulating material. The maximum frequency bandwidth of the cable is 100MHz, and the maximum transmission rate is 100Mbps. It is used for voice transmission and the maximum transmission rate is 100Mbps da... READ MORE
Classification according to frequency and signal-to-noise ratioTwisted-pair wires are commonly classified into three types, five types and super five types, and six types. The former has a small diameter and the latter has a thick diameter. The specific models are as follows:1) Category 1 line (CAT1... READ MORE
Classified according to whether there is a shielding layerAccording to whether there is a shielding layer, twisted pair is divided into shielded twisted pair (STP) and unshielded twisted pair (UTP).The shielded twisted pair has a metal shield between the twisted pair and the outer insulating sheath.... READ MORE
English
