Multi-wire electrical cables

Copper is a material that is widely used as an electrical conductor in cables used in the electrical plant building field and beyond but there are various types of semi-finished products whose characteristics can considerably change the end result. For example, multi-core copper cable is an excellent alternative to single-core because the structure has more wires, allowing for more flexibility so the cables can be used in more challenging conditions with bends and small spaces.

Multi-core copper cable can contain a number of wires ranging from 6 to 28 with combinations that allow for nominal diameters of between 0.2 and 1.05mm and elongation between 19% and 24%.

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Multi-core copper cable: uses

There are several different uses of multi-core copper cable: as a semi-finished product, it is mainly used inside stranded electrical cables and for the production of flexible rope. The greater the number of wires, the higher the class in the IEC 60228 table, which means that the cable can be more flexible.

When highly malleable conductive cables are required, it is possible to switch from class 2 strands to class 5 and 6 conductors, which allow for easy installation even in cases where there is a smaller range of movement.

Multi-core hard-drawn and annealed copper cable

Multi-core copper cable can be annealed or have different degrees of work hardening (referred to as hard-drawn or half-hard multi-core cable). The annealing process consists of bringing the material close to its melting point and keeping it at a high temperature for a certain amount of time, to make the copper more ductile and easier to work.

Multi-core hard-drawn cable is the hardest and most difficult to bend. Therefore, in specific situations like bends and small spaces, it might not be advisable to use it because the cable could become damaged. Where these types of problems exist, it is better to use multi-core cable in annealed copper, which, thanks to the process described above, is more flexible than hard-drawn copper and is easier to lay in more challenging conditions.

To ensure that you choose the right multi-core copper cable and assess the right level of annealing or work hardening, we recommend consulting specialist companies that can offer solutions that are suitable for various requirements. This will help to achieve an end product with the best flexibility tailored to meet the customer’s needs.