4mm x 4-core flexible cable is used for connecting appliances and equipment, especially those needing multiple power or control phases, and is suitable for residential, commercial, and industrial applications such as powering air conditioners, submersible pumps, and various lighting and equipment connections, particularly in settings with movement or vibration. Its flexible design allows for easy routing and installation in tight spaces, making it a versatile choice for powering devices and distribution lines within a 450/750V range.