A 4-core aluminium cable is a type of electrical cable that features four separate conductive cores made from aluminium, which are typically used for transmitting electrical power. Aluminium is chosen for its lightweight and cost-effective properties, although it has a lower conductivity compared to copper. This makes it an ideal choice for applications where weight reduction is essential and where copper is too expensive.

The four cores are usually insulated individually, and the cable may be further wrapped in a protective outer sheath. These cables are commonly used in power distribution, especially in industries such as construction, manufacturing, and utilities. They are suitable for both underground and overhead installations and are used for connecting various electrical devices like motors, control panels, and generators.

Aluminium cables are also more resistant to corrosion and offer better strength-to-weight ratios compared to other materials. However, proper connectors and maintenance are crucial to ensure long-term performance, as aluminium is more prone to oxidation. Despite these challenges, the affordability and versatility of 4-core aluminium cables make them a popular choice for many electrical applications.