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PVC insulated wire and cable products for fixed wiring with non sheathed cables for fixed wiring cable sheath, light sheath soft cable, general purpose sheath soft cable, installation with wire and shielded wire, special purpose sheath soft cable, PVC flame retardant insulation resistance, fire cable and other products.
Wire and cable industry is an important supporting industry of our country's economic construction, widely used in various fields of national economy, occupy a quarter of China's electrical industry industry, mechanical industry is only to the auto industry's second largest industry. Among them, the use of indoor decoration wires are mainly rated voltage 450/750V and the following PVC insulated cables, also known as cloth wire [1].
The examination of the quality of the wire is mainly carried out by the professional inspection agency, the main technical indicators in the report are the following:
1 conductor DC resistance. Directly reflects the current carrying capacity of the wire, which is generally said to be able to bring much of the load. This index is related to the conductor material, the cross-sectional area of the conductor (wire size).
2 finished pressure test. Mainly check whether there is leakage of the external insulation of the wire. This index is related to the insulation material and manufacturing process.
3 insulation (sheath) thickness and mechanical properties, etc.. Main assessment of wire service life and the use of the environment. The insulation thickness is too thin or thin, easy to install or use in the thin position in the occurrence of damage, the formation of leakage. Wires using poor insulation materials are short in service life.