Components of electrical wiring Cables: A conductor or a group of conductors for transmitting electric power. 2.Connectors : Connectors are essential parts of a wiring harness as they facilitate the seamless connection between various electrical components. They come in different types such as plug connectors, socket connectors, terminal blocks. 3. Wires : Electric wires are made of copper or aluminum materials because they are conductors, and these electric wires are insulated outside. They provides a way for the flow of electricity from electrical power sources to appliances easily. quote it