Wires are indispensable for home decoration. Nowadays, household appliances are more powerful, and if a small wire has a problem, it can instantly become a home security killer. As for the choice of wires, many people say, "I use 4 square wires in the whole house, so the load is bigger, it is safer!" In fact, this is wrong, the old electrician really advises you "really necessary"!
Why is it unnecessary?
There is a certain requirement in a wire to pass through a PVC pipe: the area occupied by the wire in the pipe must not exceed 40% of the pipe. Therefore, the ordinary tube can put up to six 2.5-square wires, and the four-square wire can only be placed three. If the whole house has 4 square meters of wire, it will definitely lead to insufficient position, and the number of sockets in the home will be greatly reduced.
The thicker the wire, the more expensive it is. The price of 4 square meters is much more expensive than 2.5 square meters, which is a waste in decoration funds. Just like a normal socket, it only needs 2.5 square meters, which is enough to meet most of the commonly used appliances in the home. There is really no need to use 4 square wires.
Three now many developers have also reserved the lines in advance, usually 2.5 square meters of wire. The larger the number of square wires, the less easy it is to construct. The excessive wear not only affects heat dissipation, but also has certain safety hazards. If you want to change the 4 squares, it will take time and effort.
Tian Taijun suggested that everyone: switch line with 1.5 square; lighting line, socket with 2.5 square; high-power electrical appliances (air conditioner, water heater, refrigerator, range hood, etc.) with 4 square wire; now home appliances are more, the household line uses 10 square feet is safer. Another thing to note is that the 16A socket can only be connected to a 4 square wire, while the 10A socket can only be connected to a 2.5 square wire.
It is only in the unused area that it is necessary to properly distribute the wires of different specifications in order to maximize its use and save money. It's best not to save time or worry about overloading, just use 4 square wires!