How to choose wire and cable conductor material?

The basic structure of the cable:

How to select the conductor and cable? The basic structure of a cable generally consists of the following three parts: Conductive conductor for transmitting electrical energy or signal, insulating layer for guaranteeing that the power or signal is isolated from the outside along the conductive conductor and the power grid voltage, Cover the insulation layer to protect the sealing effect and can make the insulation properties of long-term protection layer. In addition, the slightly higher voltage level of the cable, in order to shield the electric field, magnetic field in the cable and protect the cable from the external electromagnetic field, generally outside the conductor and the insulating layer made of semiconductor or metal material shielding layer; in order to make the cable core Round, need to fill the gap of the insulated core.

Wire and cable conductor material selection:

The best conductive metal is silver, followed by copper, aluminum. Due to the high price of silver, in addition to the use of silver in special occasions and special purposes, the conductor commonly used in various cables is copper wire or aluminum wire, copper is a good conductor of electricity, the electrical conductivity is second only to silver, high mechanical strength , Easy to carry out rolling, drawing and welding and other processing, good physical and mechanical properties and excellent process performance.

Given the declining trend of copper and aluminum resources, copper is probably the earliest depleted mineral resource on earth. From the perspective of scientific development, taking aluminum as a substitute for copper is an inevitable development trend. In the case of a wire and cable conductor, it is difficult to draw a thin wire due to the low strength of aluminum. Currently, it is not practical to process a soft conductor or a very soft conductor. But the cross-sectional area of ?more than 4mm2 wire and cable can rest assured that the use of aluminum conductors, and vigorously promote the aluminum copper, both to ensure the transmission function, but also can reduce input costs, in line with the strategy of sustainable development.

How to select the conductor and wire and cable materials? Copper wire and cable should be used in the following situations:

1. Need to ensure reliable connection of long-term operation of the circuit, such as important power supply, an important operating circuit and the secondary circuit, the motor excitation, mobile equipment lines, the occasion of the vibration of the line.

2. Explosion hazard or fire danger lines.

3. Serious corrosion of aluminum and copper corrosion on the occasions light

4. Particularly important public buildings, military command center places, important government office buildings, subway stations.

5. High-temperature equipment next to the place

6. And emergency systems, fire systems related to the occasion

7. Fire-resistant cable

8. Working current larger, the need to increase the number of cable occasions.

In addition, high-rise buildings, large and medium-sized computer room building, important public buildings, foreign and domestic requirements to adapt to foreign engineering projects such as foreign capital should be preferred conductor copper wire, because the small cross-section aluminum conductor connector technology in our country Get a reliable solution, and aluminum conductor joints easily lead to fire accidents.

How to choose the conductor and wire and cable materials? After the above introduction, now we have understood it if you have any questions, please click consult us!