Teach you how to choose cables. In the highly competitive cable industry, there are some low-tech technologies that use transmission voltage and current as the main cable model specifications, which makes the industry entry threshold low. Most people choose this type of cable as long as they look at the square of the conductor section, which is a very wrong view. We must first determine whether the conductor resistance is qualified. If the copper wire contains too many impurities, the square of the section will not be qualified. Because the resistance is large, the cable itself is prone to heat and damage the insulation and cause electric shock and fire. The second is to look at the insulating material. When the insulating material is used, the cable conductor and the external protective barrier are the only factors that are safe. It depends on whether the eccentricity, the thickness of the insulating layer, and the insulating material are good or bad. Qualified insulation materials have long service life and high pressure resistance. Inferior insulation materials often have peeling, breaking, and short use time, which can easily cause short-circuit faults and cause accidents. The three are armored to see the thickness of the iron and the outer layer of the iron is galvanized or painted. The fourth is to look at the outer sheath thickness, eccentricity, and material. Http://news.chinawj.com.cn Submission:
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