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Identification of the power cord
2011-04-05 20:37:46
 

Identification of the power cord

1 component. The quality of a good power cord, common components are within the confines of the rules. Such as the commonly used cross-sectional area of ​​1.5mm2 single strand of plastic insulated copper wire, 100m of each component is 1.8 ~ 1.9kg; 2.5mm2 single strand of plastic insulated copper wire, each component is 2.8 ~ 100m 3.0kg; 4.0mm2 single strand of plastic insulated copper wire, each component is 4.1 ~ 4.2kg 100m and so on. The lack of poor quality component cables, or the length of inadequate or excessive impurities in copper wire.
2 copper. Pass copper copper power cord should be purple red, shiny, feel soft. The shoddy copper for the purple copper wire, yellow or white side, impurities, poor mechanical strength, toughness, Qian An, that will break a little harder, and often broken wire within the scene. Reflection, you only need to wire a peel 2cm, and then use a white paper about the copper rub on a little, if white with black material to clarify copper impurities in the match more. Other, inferior wire insulation seems very thick, in practice mostly made of recycled plastic, a long time, the aging of insulating layer leakage.
3 manufacturers. Pretending to fake the power cord is often the "three no product," but there are also unconvinced above the origin of such identification, such as China, the Chinese province or city in manufacturing, this practice is not equivalent to standard origin.
4 price. Because the power lines posing shoddy manufacturing capital is low, therefore, when the vendors sell in the hair, often under the guise of cheap low-fat sell, deceive.


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