RVVP shielded and sheathed wire production company explains the wire and cable to be emphasized

RVVP shielded sheathed wire production company in the purchase and use of plastic wires to pay attention to a few points: 1, when buying plastic wire products, it is best to consult an experienced professional electrician, because the conductor's current-carrying capacity is related to the cross-section of the wire, but also with the conductor's material (aluminum or copper), model, laying method (open or through the tube, etc.) and the ambient temperature and so on. 2, choose a good quality and reputation, with the After-sales service enterprises to produce products. 3, check the appearance of the product. Regular product appearance should be smooth, rounded, uniform color, wire outer plastic skin color bright, fine texture, conductor using electrolytic copper, the outer layer of bright and slightly soft; informal products using recycled plastics, dull color, loose texture, conductor copper black and hard, is a regeneration of miscellaneous copper, resistivity, conductivity is poor, the use of the temperature will rise and unsafe. 4, use scissors to dial down a small section of the insulation layer to check whether the thickness is uniform (not biased core), and the thickness is uniform. Thickness is uniform (not partial core), the plastic is dense without air holes. 5, in the use of plastic wires, RVVP shielded sheathed wire production company suggests that we must be wired correctly, generally the best by a professional electrician wiring, wiring, pay attention to the wire joints, should be firmly connected, do not simply wrap the tape, so that the joints are easy to heat up after the power is turned on. 6, pay attention to the identification of the product. General plastic wire product labeling should be marked with the factory name, factory address, rated voltage, specifications, length, "3C" certification number, inspection and qualification chapter, date of production, etc., especially in the cable wire should be printed on the continuity of the logo, including the factory name, rated voltage, model number, etc. RVVP shielded and sheathed wire production company of the cable hot! The impact of the expansion and contraction of the safe operation of the cable to illustrate a few points: (1) tunnel laying, cables are generally placed on the bracket, not rigidly fixed, so the thermal expansion and contraction of the cable is large, easy to slip phenomenon when laying on an incline; in the cable is easy to bend at the serious displacement; RVVP shielded sheathed wires production company that the cable with the continuous changes in cable temperature, there will be repeated bending deformation, so that the cable metal sheathing Fatigue strain. (2) direct burial laying, the cable is restricted by the surrounding soil, the whole cable can not produce displacement, the core will be thermo-mechanical forces under the action of the two ends of the line to produce a large thrust, resulting in the end of the end of the displacement, thus posing a great threat to the safety of cable accessories. (3) municipal bridge laying, if the cable is laid in the bridge pipe, there are the same problems with the pipe laying; if the cable is laid in the bridge box girder, there are the same problems with the tunnel laying, except for the laying of cables on the bridge will also be affected by the bridge expansion and contraction, vibration, thus accelerating the damage to the cable metal sheath. (4) haiku pipe laying, the cable is not subject to lateral constraints, in the thermo-mechanical forces under the action of the cable will produce bending deformation; cable with the continuous changes in the temperature of the cable, the bending deformation occurs again and again, so that the metal sheath of the cable to produce fatigue strain. (5) shaft laying, RVVP shielded sheathed wire production company that the self-weight of the cable and thermal mechanical forces may cause excessive strain on the metal sheath, which will shorten the service life of the cable.

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