power cables on the porch of my house

In the electrical world the type of electrical cable is mandatory to be known by technicians along with the size, function and better the proper application for each type so that its use in accordance with the existing capacity.
Understanding the electrical wiring is a medium consisting of conductor material whose function is to distribute electrical current to electrical equipment. There are many types of electrical cables are available and made for various functions of use with different specifications also different to be able to conduct electrical current.
And it must be known that electricians can not be arbitrary in choosing the type of cable lsitrik to be used, the reason is because to avoid the wrong type of cable installation and not in accordance with current capacity conditions that cause unwanted things, such as cables become overloaded / overload and become hot causing a fire.
The following basic cable construction is commonly used
For home installation is usually used cable consisting of conductor and isolator, the following detailed explanation

• Conductor is a copper core part of a kind of metal material usually copper in the form of fibers whose function is to drain the electric current. In addition to copper materials are also used other materials such as aluminum, silver and even gold but for special use of course the price is also very expensive. The capacity capacity of a cable to conduct electricity is largely determined by the size of the conductor used.
• Isolator is a kind of material that can not conduct an electric current so that it is used as a wrapping of conductor material so as not to harm and so that there is no direct connection (konslet) between phase and neutral. Materials often used for insulators are rubber, plastic and can also be from polymer material. The better the insulator level in inhibiting the electric current and retaining heat the better the insulator.