Three-core flex cable refers to an electrical cable that consists of three conductors (cores) typically insulated and sheathed together. It is designed to be flexible, making it suitable for applications where the cable needs to bend or move easily.

Three-core flex cable is used in a wide range of applications, including:

• Appliances: Such as washing machines, refrigerators, and other household appliances.
• Power Tools: For connecting power tools to mains electricity while allowing movement.
• Extension Cords: Providing flexibility for temporary power connections.

The conductors (cores) of 3-core flex cable are typically made of copper due to its excellent electrical conductivity and flexibility.

Three-core flex cables are available in various sizes (cross-sectional area) and ratings, typically ranging from 0.75mm² to 2.5mm² for domestic and light industrial applications. The size and rating depend on the current-carrying capacity required for the specific application.

Three-core flex cable can be used outdoors if it is specifically rated and designed for outdoor use. Outdoor cables require additional weatherproofing and insulation to withstand exposure to moisture, sunlight, and other environmental factors.