About the cable, the most difficult to control the four indicators introduced

Combating the illegal behavior of fake and inferior wires and cables, improving the overall quality of wire and cable, and ensuring the safety of people's lives and property。

According to reports, at present, there are several prominent problems in the production, operation and supervision of wire and cable:

First, the phenomenon that the construction project bidding is lower than the reasonable cost price is common.

Second, the implementation of the main responsibility of the enterprise is not enough. 

Some suppliers produce and supply products that have problems such as cutting corners, counterfeiting, failing to qualify for non-compliance, and failing to meet the standards for safeguarding human health and personal and property safety.

Third, the engineering construction materials check system is not perfect. 

In the key projects, the building materials products will be sent to the supervision unit and the supplier for inspection, and the sampling department of the supervision department is lacking.

Fourth, departmental supervision has not yet fully formed synergy. 

Wire and cable products are used for production and circulation to construction sites. 

Different departments are responsible for the supervision, supervision power is dispersed, information exchange is not timely, and the coordination mechanism is still not perfect.

In terms of quality control, the main unqualified items of wire and cable include 20 °C DC resistance, insulation eccentricity, smoke density, and bundle burning test.

Insulation eccentricity is an important indicator for medium and high voltage power cables. 

When the insulation thickness of power cables is uneven and eccentric, the electric field distribution inside the insulation layer is no longer uniform, and the deteriorated electric field will be concentrated in the thinner insulation. 

The thinner the insulation, the greater the electric field strength, which affects the mechanical stress resistance, chemical resistance, and electrical performance of the cable. 

In severe cases, insulation breakdown can occur.

In addition, if the smoke density of the cable is unqualified, if the cable is misfired, the corrosive nature of the acid gas in the smoke will cause corrosion to the surrounding electrical equipment, resulting in serious "secondary hazard", causing huge losses and very serious accidents.

In major engineering, the wire and cable are in a relatively closed space. 

The two items of flame retardant and smoke density are unqualified. 

If the cable burns, it will consume oxygen sharply, and the generated smoke will also cause people to lose their way of escape. 

This is also a disaster. 

If you have any interest in our cable products, you can email us at info@zmscable.com or contact us via the "Contact Us" section of the website.