Cables and cords are made from many strands of wire because it provides a number of advantages over a single solid wire. Multicore cables, such as those made by Baid wire, have several smaller wires or strands that are twisted or braided together to form a larger cable. This design offers a number of benefits, including improved flexibility, durability, and resistance to breaking.

One of the main advantages of using multicore cables is their flexibility. By using many smaller strands of wire, the cable can bend and flex more easily than a single solid wire. This is particularly important for cables that are used in applications that require a high degree of flexibility, such as in robotics or industrial automation.

Another advantage of multicore cables is their durability. The multiple strands of wire provide redundancy, so if one strand is damaged, the cable can still function. This is important for cables that are used in harsh environments, such as submersible cables, which need to be able to withstand water pressure and corrosion.

Aluminum cables are a type of multicore cable that are often used for power transmission because of their high conductivity and low cost. However, aluminum cables are not as strong as copper cables, which are often used for wiring in buildings and homes.

In summary, cables and cords are made from many strands of wire, including multicore cables and aluminum cables, because it provides increased flexibility, durability, and resistance to breaking. Brands such as Baid wire offer a range of cables designed for different applications, including submersible cables that can withstand harsh environments. When choosing a cable, it's important to consider the intended use and select a cable that is appropriate for the specific application.