Why 2.5mm cable can be used for a ring circuit?

A 2.5mm² cable can be used for a ring circuit because it is capable of carrying sufficient current to meet the demands of typical household appliances, while also providing a suitable level of protection against overloads and short circuits. The ring circuit design allows the cable to be connected in a loop, effectively doubling the available current-carrying capacity. This configuration also helps to reduce voltage drop and improve overall circuit efficiency. However, it is essential to ensure that the installation complies with local electrical regulations and standards.