One, commonly used conductive materials - copper and aluminum
Usually used to make the conductive material, it must have the following conditions: high conductivity, enough mechanical strength, not easy to oxidation and corrosion, easy processing and welding, rich in resources and cheap price. Copper and aluminum are basically in line with the above conditions, so it is commonly used in conductive materials
(1) the properties of copper
Copper has good electrical conductivity and mechanical strength at room temperature, with good ductility, easy processing, stable chemical properties, not easy to oxidation and corrosion, easy welding and other advantages, can be widely used.
(2) properties of aluminium
The conductivity of aluminium slightly inferior to copper, mechanical strength is lower than copper, but aluminum resources than copper rich so cheap and widely used. Aluminum as the conductive material is the only deficiency of the welding process is more complex, corrosion resistance than the copper. The long-term use of copper temperature shall not exceed 110 degrees Celsius, the short-term working temperature shall not exceed 250 degrees, the long-term working temperature of aluminum is not more than 90 degrees, the short-term operating temperature shall not exceed 120 degrees.
Two, the classification of electric wire and cables
The main use of wire and cable: electrical energy transmission, electrical communication, winding motor, electrical winding, etc.. Types of wire and cable, in accordance with the performance, structure and use of features into five categories
The classification of electric wire and cables(1) bare wires and bare conductor products (such as copper, lead, terminal etc.)
The classification of electric wire and cables(2) electromagnetic wire (transformer, motor winding, contactor coil)
The classification of electric wire and cables(3) electric wire and cable for electric equipment (electrical equipment and power supply, control circuit of power distribution cabinet)
The classification of electric wire and cables(4) power cable (our daily production of oil wells on the electricity, substation export cables, etc.)
The classification of electric wire and cables(5) communication electric wire and cable (common communication cable)
Commonly used in accordance with the meaning of:
In the back of the material with composite T: copper material (sometimes omitted)
In the back of the material with composite L: aluminum materials,
In the back of the material with composite R: soft,
When the material followed by letter Y said: hard.