Control cable bidding price is relatively low, with the market price and all kinds of raw material prices have risen substantially. If the enterprise according to the industry standard gb production, strict implementation of the process, certainly will should be greatly losses. Wire and cable production process is not complicated, need two kind of material, one is the conductor copper or aluminum, another kind is the parcel out of plastic. Driven by the interests of, some enterprises in order to save the interest began to ignore raw materials into the factory checks, some even deliberately use inferior raw material, however bad cable sheath life is only 1/10 of the product according to industry sources, many manufacturers use copper scrap replace good copper, copper a ton of 60000 yuan, copper scrap only 54000 yuan, good copper directly from the ore extraction, resistance is low, accord with national standard; Copper scrap contains copper plating, impurity, resistance is big, the serious influence electric wire electric cable performance and life. In order to deceive the public, some manufacturers producer even with good copper-clad bad copper or copper clad steel, copper clad aluminum to cable. Inferior cable, wire, it is generally difficult to identify, such as family use wire, some with brass do conductor, great resistance. This kind of inferior wires, is professionals don't instrument also distinguish don't come out. For plastic material, manufacturers also do jerry method, such as low price to buy scrap DiaoZhen bottle, DiaoZhen pipe and so on medical waste, or import of waste plastic, qualified products with two hundred and thirty skin is no problem, and inferior plastic two or three years will be aging off. In addition, waste plastic also contain iron, copper scrap material, if used for buried cable, easy ooze water even electric, cause serious safe hidden trouble. So rampant manufacturer to do STH without authorization reduce production capital, deliberately cut corners, affirmation will directly lead to conductor resistance, degree of crosslinking, and other key indicators can not reach the standard requirement. So now product line diameter is not eligible, superimposed tolerance and jerry or reworked material do sheath phenomenon is quite common. Main problems in said insulation or sheath weightlessness project unqualified, mechanical performance is not qualified, heat extension project unqualified. Mechanical properties of the product is unqualified, sheath or insulation in laying stress process easy to snap a short circuit, leakage discharge. Heat extension project unqualified easy in high temperature circumstances cause a short circuit accident. A lot of the personage inside course of study thinks, on the market of wire, cable specifications of quality can meet the national standard of less than 50%, the situation has been very serious is more worried about the quality of the wire, cable unqualified often cause serious fire and endanger the consumer life, wealth and peace.