However, a variety of good has brought China wire and cable industry blind investment and exacerbate serious excess capacity, less than half the average operating rate, especially in recent years, the production scale of investment out of control, all types of cable lines everywhere, the vast majority of serious oversupply of products , low bid, market management deficiencies, leading to fierce competition in the market, coupled with rising raw material to bring the operating pressure, so fake, shoddy, shoddy, shoddy phenomenon is not uncommon, the industry level of product quality situation is very grim, for here, the wire and cable industry authorities say China wire and cable industry has been plunged into a state of disorder. The following is a method to identify the good and bad points of wire and cable.
1 wt. Good quality wires, generally within the specified weight range. Like the common cross-sectional area of 1.5 mm2 single strand of plastic insulated copper wire, each 100 m weight of 1.8 ~ 1.9 kg; 2.5 mm2 single strand of plastic insulated copper wire, each 100 m Weight to 2.8 ~ 3.0 kg; 4.0 mm2 single strand of plastic insulated copper wire, each 100 m weight of 4.1 ~ 4.2 kg and the like. Poor quality of wire weighs less than, or * is not enough, or too much copper core wire impurities.
2 copper. Qualified copper wire copper core should be purple, shiny, soft touch. The inferior copper wire copper core of purple, yellow or white, impurities, poor mechanical strength, poor toughness, that is a little harder to be broken, but often the cables break phenomenon. Check, you just put a stripped wire 2 cm, and then a piece of paper on a copper core rub a little bit, if there is a black substance on the white paper, described in Tongxin more impurities. In addition, shoddy wire insulation may seem very thick, in fact, mostly with recycled plastic, a time *, the insulating layer will be aging and leakage.
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Post time: Apr-05-2017