Lighting wire usage 1.5 m2. The load power of general household lighting will not be too large. There are almost 6-8 lights in dining room, living room, master bedroom, balcony, kitchen and bathroom, which are controlled within 1500 watts, and 1.5 square GB copper wire is enough.

2 water heater socket line

Water heaters are relatively large in household appliances. It is recommended to use a 4 square line. The maximum allowable load of four square copper core wires is 7000-8000 watts, and the limit value is 8000 watts. So even if you turn on the water heater or Yuba at the same time, there will be no big problem, even if it is overloaded, it will just trip.

Air conditioning socket 3 line

Air conditioning is also considered as a high-power electrical appliance at home, so the socket is also a 4-square wire, and of course a 6-square wire is also acceptable, but the construction difficulty will increase, and the area occupied by the socket bottom box will also increase, and wiring will become a very troublesome thing.

4 ordinary socket wires

Ordinary sockets at home can use 2.5 square meters of wires, and the general load is controlled within 2500 watts. But if you often use high-power appliances, I suggest you choose 4 square meters of wires.

5 wire for kitchen socket

It is recommended to use a 4 square meter wire for kitchen sockets, on the one hand, because there are many kitchen appliances, and on the other hand, because of the high frequency of use. Some kitchens run a square wire on top, then arrange sockets below, and connect the fire with a square wire of 2.5. All the sockets are connected separately from the square wire. So there is no problem with this practice.