Now that we have a fair idea of sizes and types of wires/cables we are to select for our house wiring, it is now save to go to the market and select ORIGINAL cables otherwise called “Nigerian cables”.
To demonstrate how to determine the right wire/cable, we shall examine the reason why a roll of wire of single core 2.5mm2 “Nigerian cable” is sold for N14, 500 and another roll of wire of single core 2.5mm2, also called Nigerian cable is sold for N3, 800.
We now know that cables and wires are mostly made with copper and aluminum materials. In this section, we shall focus on copper wires, the most widely used in house wiring, know some types of wires and examine the reasons for selections of those wires in house wiring. Most of the guidelines given below are for general applications as a guide; the qualified Electrical Engineer/Technicians must be consulted when big electrical installation work is to be carried out.
As explained in earlier editions of this series, electricity occurs as a result of electrons flowing in a particular direction. Electrons can however not travel through all mediums. Some media or materials permit the movement of electrons and so they are called Conductors, while some materials do not allow the free movement of electrons and so they are called Insulators. Examples of conductors are basically all metals and human beings, while examples of insulators are dry wood, bricks, ceramics, glasses, plastics and so on.
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