Tips for home decoration wire purchase beware of h

2022-07-22
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Electricity safety is related to the life and health safety of every family member. In addition to the intuitive building materials such as switches and sockets, it is more important to hide the wires of the project. When purchasing wires, it is inevitable to encounter unqualified products. So how to buy high-quality wires? What are the precautions for choosing wires? Let's get to know

electricity safety is related to the life, health and safety of every family member. In addition to intuitive building materials such as switches and sockets, it is more important to hide the wires of the project. When choosing wires, it is inevitable to encounter unqualified products. So how to choose high-quality wires? What are the precautions for choosing wires? Let's get to know

I. wire purchase channels

users who are not too price sensitive can purchase wires in regular shopping malls. After all, they can contact the real objects, which is more intuitive. They can identify the trademarks, specifications, voltages, etc. printed on the wires to prevent errors

if you want to buy high cost-effective wires, you can only choose online shopping channels. Some brands have also opened brand flagship stores on Taobao, which are directly operated by the government. You can rest assured that the biggest advantage is that the price is much cheaper than offline shopping malls, because it saves links such as venue rent, health care fees and price increases of agents at all levels

II. Wire types

the two main wire types in home decoration wires are BV and BVR wires. At present, BV wires are used more than BVR wires in home decoration

the hardness of BV wire is higher than that of BVR wire, and the inner core is 99.99% oxygen free copper

bv:

advantages: long service life, not easy to oxidize, and resistant to short-circuit current impact due to the small ratio of cylindrical area/cross-sectional area. It is generally used in shielding engineering; In some places with strict requirements, such as the secondary outgoing line of current transformer, the specification clearly indicates that BVR line is prohibited

disadvantages: the wire is hard, and it is difficult to straighten after bending. Repeated bending straightening is easy to be injured, and it is labor-intensive when inserting small tubes. It is mostly used in fixed and buried environments

bvr:

advantages: because the line is soft, it is mostly used in active electric field and temporary electric field, and it is convenient to install, drag and drop and move

disadvantages: short service life. Due to the large ratio of cylindrical area/cross-sectional area, the oxidation speed is fast. If impacted by short-circuit current, the surface will be seriously oxidized after high temperature, and the effective cross-section will be greatly reduced. It is easy to have problems such as broken core and local heating, so it should be replaced in time for the sake of safe power use

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