Electric wire is one of the most inconspicuous materials in the selection of materials for home improvement. Although the electric wire has a small "responsibility", it is important, and it is the guarantee of the safety of people's lives and property. Many fires in life are caused by the aging of wire and cable, unreasonable configuration, or the use of poor quality wires. Therefore, consumers must polish their eyes when purchasing electric wires, and carefully identify them to prevent them from happening. There are many types and specifications of wires on the market. How do you identify the advantages and disadvantages when buying? Mr. Bai Anju Anju: Consumers can identify from the following four aspects when purchasing: 1. First look at the coiled wire packaging brand, whether there is the "Great Wall Logo" and the production license number of the China Electrotechnical Product Certification Committee; see whether there is a quality system certification; see whether the certification is standardized; Factory address, inspection seal, production date; see if trademarks, specifications, voltage, etc. are printed on the wires. Also depends on the cross-section of the copper core of the wire. The superior copper is bright in color and soft in color. The copper core is reddish in yellow, indicating that the copper material used is of good quality, and the yellowing of the yellow copper is a reflection of low-quality copper. 2. You can take a wire head and bend it by hand repeatedly. Anything that is soft to the touch, has good fatigue resistance, has a high elasticity to the plastic or rubber feel, and has no cracks on the wire insulation is a superior product. The outer plastic skin of the wire should be bright in color and fine in texture, and there should be no open flame when lit with a lighter. 3. Take a section of insulation and see if its core is in the middle of the insulation. Not centered is the phenomenon of eccentricity caused by the low process. If the power is small, it can be safe. Once the power consumption is large, the thinner side is likely to be broken by current. 4. In the end, we must look at the length and thickness of the core to see if it has any hands or feet. What is the difference between lighting cables and air conditioning cables? Mr. Bai Anju Anju: Household power cords should use BVV2 × 2.5 and BVV2 × 1.5 types of wires. BVV is the national standard code for copper sheathed wire. BVV2 × 2.5 and BVV2 × 1.5 respectively represent 2 cores 2.5 square mm and 2 cores 1.5 square mm. In general, BVV2 × 2.5 is the main line and trunk line, and BVV2 × 1.5 is the single electrical branch line and switch line. BVV2 × 4 for one-way air-conditioning dedicated line, with special ground wire. Do you have to use a cable tube for home improvement wiring? Mr. Bai Anju Anju: The use of a wire tube can play a very good role in protecting the wire, avoiding the acid and alkali damage to the wire, and can prevent rodents and insects from eating the wire. When the wire is overheated and fires, it can effectively flame retard and prevent Fire occurred. The wiring of home decoration generally uses PVC plastic pipes as wire protection pipes. When laying the wire through the pipe, the total wire cross-sectional area of ​​the wire should not exceed 40% of the inner diameter of the pipe. When designing the wire laying, the wire and the signal wire cannot pass through the same tube to avoid mutual interference. Luggage Wheel Axle,Replace Luggage Wheels,Replacement Wheels For Luggage,Carry On Luggage Wheel VOLO silent wheel , https://www.volowheels.com