Electrical installations require two types of electrical wires, flexible and rigid, which serve different purposes. Stiff wires have to be manufactured with a single solid conductor to ensure that it provides strength and stability for fixed installations. Unlike stiff wires, flexible wires are made of multiple intertwined strands which allow a lot of twisting, meaning they are great for applications where movement is required. It is very important to know the difference between these two types of wire as it helps ensure safety and functionality of the project.