The power of the electrical equipment is 2500W, and the operating current at 220V power supply is: I=P/U=2500/220=11.4A2. The safety current of the copper wire: I1 is 6-9 amps per square millimeter. Count as 6. 3. The cross-sectional area of ??the copper wire: I/I1=11.4/6= 1.9 square millimeters 4. Therefore, the cross-sectional area of ??the copper wire is selected: 2.5 square millimeters

2.5 square meters of copper core wire can be used for open wire installation , 4 square meters of copper core wire should be used for laying hidden wires, and the power socket should be 16A. It is best to use a power socket with a 16A switch to avoid frequent plugging and unplugging of power plugs that may cause poor contact.