Power cable is a medium to distribute electrical energy. An electrical cable consists of an insulator and konduktor.Isolator here is that cable wrapping material usually made of polyvinyl material, while the conductor is made of solid copper or fiber. The ability to deliver the flow of electricity from a power cable is determined by CRC (current-carrying capability) has, since the electrical conductivity parameters specified in units of Ampere.
Current-carrying capability is determined by the cross sectional area of the conductor that is in electrical wires, while the provisions of the CRC electrical wires arranged in SPLN specifications. Classification conductor according to the material:
1. ordinary metal wire, for example: (a) BBC (Bare Copper Conductor), and (b) AAC (All Aluminum Alloy Conductor).
2. Wire alloys (Alloy), for example: (a) AAAC (All Aluminum Alloy Conductor), (b) metal alloy wire (composite), such as copper clad steel wire (Copper Clad Steel) and aluminum-coated steel wire (Aluminum Clad Steel).
3. Wire wrap mixture, namely wire windings consisting of two or more metals, for example: ASCR (Aluminum Cable Steel Reinforced).
Classification conductor construction according to:
1. The solid wire (solid wire) berpenampang round.
2. berlilit wire (standard wire) comprising 7 to 61 solid wire that is wound into one, usually layered and concentric.
3. The hollow wire (hollow conductor) is a hollow wire is made to obtain a large external diameter.
In addition, the power cord can be diklsifikasikan as bare conductor (without insulation), and insulated for example, HIS, NYY, and NYFGBY
Semiconductors
Based on research, the electrical properties of some materials can be changed depending on the conditions. Glass as an example is a good insulator at room temperature, but will become a conductor when heated at high temperatures. Gases in air, normally an insulating material also will be conductive when heated at high temperatures. Some metals into a poor conductor when heated, and become good conductors when cooled. Many conductive material becomes conductive perfectly and called superconductivity at very low temperatures.
In addition to conductors and insulators as described above, also known as a type of electrical material that has unique properties that semi-conductors. The resistance value of the semiconductor material is above the resistance value of the conductor material but below the resistance of insulating materials. That is why it is called a semiconductor material. Conductivity of semiconductor materials are very unique. Below is given the various ways in semiconductor materials can conduct electricity.