Wire and cable unqualified reasons and precautions

Wire and cable are used for the transmission of electricity, the transmission of information, and the realization of electromagnetic energy conversion of a large class of electrical products.

If in the sampling process, found a large number of unqualified products, these poor-quality products for the normal operation of the power system have buried many hidden dangers.

The following is the ZMS cable for you to analyze the reasons for unqualified wires and cables and precautions.

Marked Unqualified Cable

Marking is the main way to identify the basic information of the wire and cable products.

According to the standard, the main content of the mark is the product model, specification, standard number, factory name, origin, and so on.

When the marking is unqualified, it will cause the construction personnel to identify the error, which may cause electrical accidents in serious cases.

Structural Dimensions of Unqualified Cables

The main problem of structural dimensions is sheath thickness and insulation thickness.

When the sheath and insulation thickness of the cable is substandard, it will seriously reduce the resistance strength of the wire and cable and shorten the service life of the wire and cable.

In serious cases, it can lead to wire and cable breakdown, and the insulation sheath layer can not play a normal protective role, resulting in electrical short circuits and fires.

Elongation Qualified Cable

Insulation sheath aging before the tensile strength and elongation is unqualified, directly and greatly shortening the service life of wire and cable.

And in the construction process or long-term energized high-temperature environment, the insulation layer is easy to break, resulting in the conductor being charged and exposed, there is a risk of an electric shock short circuit.

The main reason for its failure is the use of recycled material production to reduce product costs, and secondly, does not have the production qualifications of small enterprises.

Conductor Resistance of an Unqualified Wire

Conductor resistance is mainly to assess the wire and cable conductor material and the cross-section is in line with the important indicators.

When the conductor resistance exceeds the standard, the current through the line when the loss increases, exacerbating the wire and cable heating.

The main reason for unqualified conductor resistance is that to reduce costs, companies will shrink the copper material, which accounts for 80% of the cost of raw materials. 

Either reduce the cross-sectional area of the conductor or use recycled copper with excessive impurities.

Resulting wire and cable conductor resistance seriously exceeds the standard, in addition to easy to cause a fire in the use of the process, it will accelerate the coating in the wire outside the insulation layer aging.

Notes on the Purchase of Cables

First, observe the appearance of the wire.

Qualified products of the insulation sheath layer are soft and tough, and the surface layer is tight, and smooth, with no roughness.

If the plastic wrapping the wire is easy to peel off, there is a lack of plastic strength.

Second, observe the cross-section of the wire.

Qualified products should have a metallic luster on the surface of the copper core or aluminum core, the surface of the blackened copper, or the whitish surface of the aluminum that has been oxidized.

Finally, when buying wire pay attention to check the quality certificate.

If the quality of the wire is qualified, then the quality of its wire should also have been tested and will not be too big a problem.

To improve the safety of the electrical circuits in your home, ZMS Cables suggests that you use low-smoke halogen-free flame retardant cables as your home wiring when purchasing cables for wholesale.

ZMS cable production has always used high-purity oxygen-free copper as the core to eliminate the occurrence of overload.

At the same time, the use of self-developed environmentally friendly materials as insulation greatly reduces the risk of short-circuit leakage.

With the use of ground wire your family brings multiple protection, so in line with the national standards of the cable to truly protect our lives.

The use of cable must not take a chance, once the accident occurred, it is too late to regret it!