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12

2023

The purpose of outdoor water blocking lines

1、 Definition and characteristics of outdoor water blocking lines Outdoor water blocking line is a type of electrical wire specifically designed to provide protection for electrical equipment and circuits in outdoor environments. Its characteristic is excellent waterproof performance, which can withstand the erosion of natural factors such as wind, rain, sun, and rain in outdoor environments, and avoid the occurrence of moisture, oxidation, and other situations on the wires. At the same time, it also has characteristics such as temperature resistance, wear resistance, and weather resistance, and can work stably for a long time in outdoor environments. 2、 The application scope of outdoor water blocking lines Outdoor water blocking lines are mainly used in the following scenarios: 1. Outdoor lighting system: such as street lights, landscape lights, etc. 2. Power equipment: such as switchgear, box transformers, cable trays, etc. 3. Communication equipment: such as telephone poles, television antennas, etc. 4. Security equipment: such as surveillance cameras, turnstiles, etc. 5. Other outdoor equipment: such as billboards, signage, etc. 3、 The advantages of outdoor water blocking lines The use of outdoor water blocking lines has the following advantages: 1. Protect electrical equipment from natural factors such as rainwater and moisture, and extend the service life of electrical equipment; 2. Prevent safety accidents such as short circuits and leakage of electrical wires, and ensure personal and property safety; 3. Possess good weather resistance, temperature resistance, wear resistance and other characteristics, and adapt to complex outdoor environments; 4. It is easy to install, has a long service life, and is economical and practical in maintenance and replacement. 4、 Precautions for selecting outdoor water blocking lines When selecting outdoor water blocking lines, the following points should be noted: 1. Choose products with excellent waterproof performance to ensure that the wires work properly in complex environments; 2. Confirm that the temperature resistance and wear resistance of the wires meet the actual requirements; 3. Choose products produced by legitimate manufacturers to ensure reliable quality; 4. Reasonably select and match the size and length of the wires according to the usage requirements; 5. Follow electrical safety regulations and operating procedures, and correctly install and use outdoor water blocking lines. 【 Conclusion 】 Outdoor water blocking wire is a type of wire with excellent waterproof performance. Its application can ensure the normal operation of electrical equipment, avoid safety accidents, and have good durability and economy. When selecting and using, attention should be paid to safety and regulations to ensure the normal operation of outdoor electrical equipment.

12

2023

The difference between RVV and RVVP

RVV wires and cables and RVVP, RVV refers to unshielded sheathed power lines, and RVVP refers to shielded sheathed power lines. P represents shielding, which means that RVVP has an additional layer of shielding layer (aluminum foil+shielding mesh) compared to RVV, with the main effect of anti-interference (external signal interference). The specific choice between using RVV or RVVP should be based on the performance of the wires and cables and the required usage. 1. Different definitions The full name of RVV cable is copper core PVC insulated PVC sheathed flexible cable, also known as lightweight PVC insulated polymer, commonly known as soft sheathed wire, which is a type of sheathed wire. RVV wires and cables are two or more RV wires with an additional layer of sheath. RVV wires and cables are the most commonly used cables in weak current systems, with an indefinite number of core wires, two or more, and a PVC sheath on the outside. There are no special requirements for the arrangement of core wires. The letter R represents flexible wire, and the letter V represents insulated polyvinyl chloride (PVC), The full name of RVVP is copper core polyvinyl chloride insulated polyvinyl chloride sheathed shielded flexible cable, where R represents flexible wire; V polyvinyl chloride insulation; V polyvinyl chloride sheath; P shielding. RVVP is a type of cable with a soft conductor PVC insulated wire and a shielding layer and PVC sheath. It is a copper core PVC insulated shielded PVC sheathed soft cable, also known as an electrical connection anti-interference soft cable. Rated voltage 300/300V. 2. Different colors RVV is black and white. RVVP is black. 3. Different uses RVV wires and cables are mainly used for power lines, control lines, and signal transmission lines in electrical appliances, instruments, electronic equipment, and automation devices. They can be specifically used for anti-theft alarm systems, building intercom systems, household lighting connection lines, etc. RVVP is suitable for communication, audio, broadcasting, audio systems, anti-theft alarm systems, intelligent automation systems, automatic meter reading systems, fire protection systems, and other data transmission cables that require anti-interference line connections and are efficient and safe. The advantage of RVVP is to minimize the interference of external signals.

12

2023

What is the difference between a fire line and a regular line

1、 The material of fireproof wire is different from that of ordinary wire Fireproof wires are usually made of flame-retardant materials, which can effectively slow down the speed of wire burning, thereby reducing the occurrence of fires. Ordinary wires may not necessarily be made of flame-retardant materials. 2、 The structure of fire lines is different from that of ordinary lines The structure of fire wires usually adopts a double-layer insulation structure, and the space between the inner and outer layers can reduce the heat generation and heat transfer rate of the wires. This structure can effectively reduce the heat and duration generated by electric sparks, and reduce the possibility of fire. Ordinary wires only use a single-layer insulation structure. 3、 The safety performance of fire wires is different from that of ordinary wires Due to the fire resistance of fire wires, the internal fireproof materials can effectively suppress the generation of electric sparks and prevent the occurrence of fires in the event of wire failure or overload. When ordinary wires experience faults or overload, they are prone to generating electrical sparks inside, which can easily lead to fires. In summary, there are differences in materials, structure, and safety performance between fireproof wires and ordinary wires. Choosing fire prevention lines can effectively prevent the occurrence of fires and improve the safety performance of electrical equipment. Therefore, when selecting wires, suitable fire-resistant or ordinary wires should be selected according to the actual situation to ensure the safety of life and work.

12

2023

Application of RVVP power cord

RVVP is a type of cable with a soft conductor PVC insulated wire outer layer and PVC sheath. Copper core PVC insulated PVC sheathed soft cable, also known as electrical connection anti-interference soft cable. RVVP cables are suitable for efficient and safe transmission of data in communication, audio, broadcasting, audio systems, anti-theft alarm systems, intelligent automation systems, automatic meter reading systems, fire protection systems, and other areas that require anti-interference line connections. What kind of wire is rvvp The rated voltage of RVVP cable is 300/300V, and the commonly used number of cores is 2-24. The commonly used core wires include: 0.5 square, 0.75 square, 1.0 square, 1.5 square, 2.5 square, 4 square, 6 square, etc. RVVP cable is somewhat different from RVV cable. RVVP cable uses copper wire weaving, which has better electromagnetic compatibility characteristics. Therefore, it is particularly suitable for installation sites with harsh electromagnetic environments and small installation distances. RVVP cable products can be installed in cable trays and hoses for indoor installation. RVVP cables come in two types: flame retardant and fire-resistant: RVVP flame-retardant cables are not easily ignited and are used in situations with high requirements for flame retardant performance. RVVP fire-resistant cables can maintain a certain period of safe operation even under combustion conditions. They are used in situations where there are high requirements for cable fire resistance characteristics, and customers can choose different types of cables according to different requirements.

12

2023

What audio cable should I choose for the sound system? Does audio cable affect sound quality

What are the common audio cables? Audio cable is actually a type of cable that transmits sound. For example, Canon plug, red and white lotus plug, small Samsung plug, large Samsung plug, low-frequency cable (subwoofer cable), and so on It is used for a connection between different devices to transmit a signal of sound. Each type of audio cable is compatible with a different device, so when buying a cable, it is important to see what interfaces your device supports. When some devices support multiple audio interfaces, you should try to choose the wire with a lower loss rate of oxygen free pure copper, because the sound quality loss rate is higher during the transmission process. A good audio cable can allow the device to play the best effect!

12

2023

Why are high-end audio cables made of single crystal copper

Why do high-end wires often use single crystal copper as conductive wire cores, and what is the difference between them and oxygen free copper. The main differences are as follows: 1、 Different purities OFC (oxygen free copper): Copper with a purity greater than 99.95%, an oxygen content not exceeding 0.003%, and a total impurity content not exceeding 0.05%. OCC (Monocrystalline Copper): Single crystalline copper with a purity of over 99.996%, manufactured using the "high-temperature hot casting mode continuous casting method". Single crystal copper is further divided into sub categories such as PC-OCC and UP-OCC. 2、 Different structures Single crystal copper is a type of high-purity oxygen free copper, in which the entire copper rod is composed of only one grain and there is no "grain boundary" generated between the grains (the "grain boundary" will reflect and refract the passing signal, causing signal distortion and attenuation). Oxygen free copper is pure copper that does not contain oxygen or any residual deoxidizers. The characteristics of single crystal copper: 1. The purity of single crystal copper reaches 99.9999%; 2. The resistance is 8% to 13% lower than that of ordinary copper materials; 3. High toughness, ordinary copper can break after 16 turns of twisting, and single crystal copper can twist 116 turns. Such advantages make single crystal copper products a material for producing high fidelity audio and video signals, high-frequency digital signal transmission cables, and ultra-fine wires used in the microelectronics industry. They can be used in fields such as mobile phones, audio systems, and computers, resulting in better performance, smaller size, and longer lifespan of microelectronic devices. Single crystal copper is very popular in the audiovisual industry due to its excellent conductivity and conductivity.

12

2023

How to distinguish network cable categories

The outside of the network cable is marked with various numbers and letters. Cat6 represents six types of network cables; Cat5e represents super five categories, and cat6a represents super six categories. UTP stands for Unshielded Twisted Pair; STP stands for shielded twisted pair cable; The shielding network cable has a stable and better transmission effect, but requires specialized switches and crystal heads. On the contrary, it is not as good as unshielded Ethernet cables, which have stronger adaptability and are more suitable for home use. The biggest difference between Category 6 network cables and Category 5 network cables is the addition of a cross insulated skeleton, where four pairs of cables are placed in the four grooves of the cross skeleton, and the diameter of the cables is also thicker. Also, a reminder: Category 5 Ethernet cables are Cat5e, while Category 6 Ethernet cables are Cat6A. Some cables labeled as Cat6e or Cat5a are not classified as standard Ethernet cables, and their transmission performance cannot be guaranteed. There is a possibility of counterfeit products, so please pay attention to identification.

12

2023

What is the difference between Category 5 network cables and Category 6 network cables

The main difference between the use of Category 5 and Category 6 cables is the maximum achievable speed. The transmission speed of various types of network cables can refer to the following figure: focus on Category 5 and Category 6. Because Category 5 cables have been basically phased out, while Category 6 cables are mainly used in offices, unless wealthy individuals, there is no need to purchase Category 6 cables for home use. The seven types are mainly used in environments with strong electromagnetic interference, such as telecommunications centers, television stations, hospitals, internet cafes, and so on. Ordinary households can blindly select up to six types of gigabit unshielded Ethernet cables, which are suitable for both home and office use. If you want to meet the needs of more than ten years of application in one step, you can choose over 60000 megabytes.

12

2023

How to truly distinguish the quality of cables and wires from inferior ones

It may be more difficult to detect foot movements in meters, as customers generally do not have equipment to actually measure meters. Similarly, using the weight measurement method can determine whether the cable is foot long. Alternatively, having the factory print the rice label during production is also a good method, but it should be noted that lines with a diameter less than 5mm cannot be printed with the rice label. Zufang copper is a precious metal. If there is a slight loss in the copper diameter, it can reduce a lot of raw material costs, which requires the use of a micrometer to measure the diameter of the copper wire. If there is no micrometer, a simpler method is to weigh the entire roll of wire and see if it is much lighter than high-quality cables. Alternatively, you can refer to the nominal weight provided by the factory. Some factories give lower nominal weights, which naturally cannot guarantee product quality. How to distinguish the quality inside wires and cables: High quality copper cables use high-purity oxygen free copper, with a bright copper core color and a relatively dull surface for poor copper wire. extruder Plastic plastics use high-quality native plastics with good bending performance. When bending cables, no texture will be produced. Poor recycled plastics will show obvious texture after bending a few times, and fracture will occur after bending multiple times. Cable equipment In order to ensure the roundness of the cable, for multi-core cables, fillers are added to the core and the sheath thickness is relatively thick. If the cable in hand is not round, it indicates that there is very little filler added and the sheath is thin. Cable equipment During production, multiple strands of copper wire are bundled to improve the tensile performance, roundness, electrical performance, and tightness with the insulation layer of the copper core. However, due to the increased use of copper, many factories omit this step. The method of differentiation is to cut open the core wire of the cable and see if the copper wires inside are twisted together in a regular manner. Weaving cables with copper mesh braiding layer accounts for a large part of the cable raw material cost, and the coverage of the braiding layer directly affects the electrical performance of the cable. At the same time, tight braiding layer can increase the strength of the cable and reduce the decrease in electrical performance of the cable in a bent state. So looking at whether the weaving layer has high coverage and uniform and dense weaving is an important means of distinguishing between good and bad cables.

12

2023

Cable types with high market demand in recent years

As a fundamental component of the industry system, cables are widely used. Therefore, with the rapid development of China's economy, the prospects of the cable market are also very promising. In the coming years, there will be significant development in some cable markets, and some cable products will meet a large market demand. The usage of overhead lines will significantly increase

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