XSD Tell You, How To Choose The Good Quality And Cheap Wire And Cable

I think we all know that the quality of wire and cable is mainly expressed in the quality of the appearance of this commodity, no matter what kind of cable, we pay great attention to the appearance of quality in manufacturing, there is strict management and inspection, sheath is the appearance of power engineering cable, its appearance is defined as bright and lustrous, glossy proportional, no eccentricity, shall not be higher than the required error, no damage to mechanical equipment, not flattened, no visible dirt, Air bubbles, sand holes, obvious particles, round bamboo shape, large twist shape, etc. In addition to the above quality standards, the thickness of the sheath is critical to the quality of power engineering cables.

If the thickness of the sheath is less than the specifications will not pass, but if the thickness exceeds the specifications do not meet the standards. For example, the cable model specification is ZR-KVVP4*1.5mm2, the measured average thickness of the sheath is 1.6 mm, and the model specification refers to GB9330-88, the thickness should be 1.2 mm; therefore, this cable is judged to be unqualified. Power cable failure generally leads to the following problems, even product quality problems.

Shorten the service life

After the cable is laid, it needs time to be plugged in, which will generate energy. The permissible working temperature of electrical conductors is 70℃, and the long-term working temperature of polyethylene cannot exceed 65℃. If the working temperature may increase in summer, this temperature may be released according to the outer sheath and the sheath thickness will increase, making it impossible to release the energy and possibly endangering the service life of the cable. Due to the thermal effect of polyethylene, a series of physicochemical reactions will occur within the cable sheath, resulting in the loss of the inherent high quality properties.

Disadvantages of raw material performance

Raw material performance is not based on thickness. According to GB8815-2002, if one of its index values fails, and the raw material of flame retardant polyethylene is less than 30.

Problems in cable construction

If the relative density of electric conductor, cable sheath and hand braid are controlled according to the regulations, and the suitable filler is chosen to make it shine, how can the sheath be squeezed so thick?

Increase the difficulty factor of cable laying

Now the cable laying to cable bridges or threading tube is the main. Now many companies will advocate cable regulations tight, small diameter, in the whole laying process can have gaps, release energy, to ensure that the cable outer sheath is not destroyed, otherwise it will bring some difficulties to the construction unit and cable laying.

In general, the thickness of the cable sheath in power engineering should be controlled according to the specifications, which can not only save energy, reduce material consumption, improve efficiency, but also to ensure the quality of the cable in power engineering, creating a good value for money wire and cable.

Well, the above is about "XSD tell you, how to choose a good price wire and cable" is introduced, I hope it can help you! We recommend to continue to pay attention to XSD cable, to learn more information.