What line is used for the main line of 140 square family safety electricity

For home use, 4 square copper core wire is fine.

Home decoration wiring is generally divided into lighting wiring and electrical wiring, 140 square meters of home lighting part with square copper core wire is enough, and electrical appliances are generally wired according to 2 parts: air conditioning and daily household appliances (refrigerators, washing machines, televisions, computers......And so on).

4 square copper core wires can be used for daily household appliances;

The air conditioning part can use 6 square copper core wire;

The square millimeter copper core wire can withstand the load of 2200W, the square millimeter copper core wire can withstand the load of about 3500W, the 4 square millimeter copper core wire can withstand the load of 5200W, and the 6 square millimeter copper core wire can withstand the load of 8800W

General requirements for modern home decoration: the main line of the power supply is a copper core single strand of 6 square millimeters. The secondary main line is a single strand of 4 square millimeters of copper core, and the line below the square millimeter of lamps and lanterns is sufficient. If there are special requirements for electrical equipment, the requirements of the manual shall prevail!

Depending on how much load you have, there are generally one or two air conditioners to take a 4-square-meter line.

The kitchen takes a 4-square-meter line, and other lines can be used, because there are more kitchen appliances.

According to the design of 2002, 10 square copper wires enter the household, which is enough according to the existing electrical appliances.

To determine how many wires are needed for a 140 square meter house, it needs to be considered on a case-by-case basis, including the following factors:

Electricity load: Determine the electricity load based on factors such as the purpose of the house and the number of occupants. For example, the type, quantity, and power of electrical appliances that need to be supplied with electricity.

Wire Specifications: Calculate the wire specifications required for high branches based on the electrical load. Different wire specifications can withstand different currents and powers, so it is necessary to choose the appropriate wire size according to the specific situation.

Wiring method: According to the structure and use of the house, determine the wiring method of the wire. For example, if you need to route wires through walls, floors, ceilings, etc., you need to consider the length and number of wires.

Considering the above factors, we can roughly estimate how many wires Qi Ximin needs for a 140-square-meter house. Generally speaking, ordinary homes need to use or 4mm wires, and if you need to connect high-power appliances, you may need to use larger gauge wires. The specific number of wires needed also needs to be calculated according to the actual situation.

It is recommended that you have an electrical engineer conduct a site survey and design to ensure that the wires are safe, reliable and reasonable.

Under normal circumstances, a home circuit with 10 square wires is sufficient.

When laying out the home circuit, the key is to correctly select the right size of wires, divide the electrical circuits in the home, and calculate the current required for each circuit. Choose the right wires and switches according to the amount of current. Before arranging the circuit, it is necessary to divide the electrical circuit in the home, so that the size of the wires and switches of each circuit can be reasonably determined.

Generally speaking, there are four types of switches in the distribution box at home: main switch, socket circuit switch, high-power circuit switch, and lighting circuit switch. The household voltage is 220V, and the power of household appliances is different, according to the current calculation formula P=UI, the current carrying capacity of each circuit can be accurately calculated, for example, the power of 2 HP air conditioner is about 1500W, and the required current carrying capacity is.

1。Apart from the air conditioner, you didn't specify whether there are other high-power appliances, I mean that all high-power appliances should have separate circuits.

2。There is no need for the socket in each room (note that it is a socket, lighting to be set separately) separately divided, generally speaking, the guest and dining room share a line of electricity, and a few bedrooms share a line of electricity on the line, otherwise your distribution box location may not be enough and the cost is larger.

3。In terms of circuit distribution, your home can have one circuit for each air conditioner (4 square lines, air conditioners can also use square lines), one circuit for the kitchen (4 square lines), one circuit for each bathroom (4 square lines), ordinary sockets in other spaces are divided into two circuits (square lines), and lighting is divided into two circuits (square lines). In addition, except for the lighting circuit and the hanging air conditioning circuit, the other circuits should be controlled by leakage protection circuit breakers.

Each circuit should have a ground wire.

Single-core square wire (refers to BV single-strand copper core wire) is used for lighting fixtures.

Single-core square wire (refers to BV single-strand copper core wire) is used for switch sockets.

Single-core 4 square wire (usually referred to as BV single-strand copper core hard wire) is used for air conditioner or water heater or withstand voltage in 5000km-7000km

For the above electrical appliances, the single-core wire 6 square wire (usually refers to the BV single-strand copper core hard wire) is used for the total incoming wire.

Two-color wires of various specifications are generally used as grounding wires.

The two-core three-core sheathed wire (usually referred to as copper sheathed BVVB, or aluminum sheath) is used as an open wire, which is mostly used for construction on the construction site, and is not used for home decoration.

Three-core sheathed wires squared wires (usually copper-sheathed BVVB wires) can be used for cabinet air conditioners.

When decorating, try to use red as the finch closed fire line, green, yellow, blue and black as the zero line, and two-color line as the ground line.

Half of the wires used in home decoration are single-strand copper core wires, and there are three main specifications of its cross-sectional area, namely square millimeters, square millimeters and 4 square millimeters, and there are 6 square millimeters specifications, but they are mainly used for the main trunk line of the household, and they are almost not used or used very little in the home decoration.

4 square millimeter specification.

It is mainly used for the main circuit line and air conditioning, electric water heater, etc., and must take a special line. It is best to use 4 square millimeters of kitchen wires. Due to the large number of kitchen appliances and the large power consumption, in order to ensure normal use, choose a wire of 4 square millimeters.

Square millimeter specification.

It is mainly used for the power supply and some branch lines of the old year's blue socket, and the refrigerator or small number air conditioner can also be safely used in the case of a special line.

Square millimeter specification.

It is mainly used for lighting and switch wires, and half of the ground wires in the circuit will also use this specification.