annex-------------- Explain some of the places in the diagram: NVC lighting air conditioning socket lighting electric water heater house decoration living room kitchen cabinet door bedroom bedroom bedroom lamp TECLIC , https://www.teclicfloors.com
1. First of all, from the gate, the size of the gate is only an example. As for the size, I think it should be based on the size of the entrance line and the size of the upper circuit breaker (ie, a miniature circuit breaker behind a single household meter) or the size of the meter. The current house entrance line requires 10 square meters or more, and the three square lines with 10 square lines are under the PVC pipe concealment mode (with the line length ignored), and the long-term safety ampacity at 30 degrees is 46A. The following 16 squares are 61A; of course, the data given by different manufacturers and standard setting units will be somewhat different, but the difference should be small, according to the conditions of the electric current of the electric wire safety current carrying capacity “circuit breaker rated currentâ€, I think 10 squares and 16 It is reasonable and safe to use the 40A and 50A circuit breakers in the square entry line respectively. The bigger the total switch is, the better. The total current of household electricity is not so great. You can't open all the electric appliances together. . Another method to determine the size of the indoor gate is to look at the circuit breaker behind your home appliance downstairs. The rated current of the indoor total gate can only be less than or equal to it. It cannot be larger than it, otherwise the lower switch is bigger than the upper one. no point. You can also look at the maximum rated current of the meter to determine the total size of the indoor gate. For example, the parameter on your meter is 10(40)A. The number in parentheses indicates that the maximum current the meter can withstand for a long time is 40A. In this upper limit value, the measurement error of the internal meter will be within the specified range. If it exceeds this value, metering will be inaccurate or the meter will be burned. Therefore, if the meter is used with the above parameters, then your line of entry should also be 10 square, the indoor gate can only use 40A.
2. They also said that in order to save money and save trouble, some people have to make sure that they don’t carry the missing guarantees. This is unreasonable. If one point leaks, the whole gate will jump open and the entire house will be cut off. It’s okay during the day. But it must be dark at night. So it's more reasonable to have outlets with leakage insurance. There may be people who want to split the road and the total gate leakage protection. This is not impossible, but the leakage current of the main gate must be more than 2 times larger than the road, and it is a model with delay (such as tapping 30MA leakage Value, instantaneous type, that the total gate leakage protection will have a leakage value of 100MA, delay type), otherwise after a leakage, an opening and closing gate may trip at the same time; as mentioned before, if the total gate leakage guarantees 100MA, Downstairs unit total leakage circuit breaker is 100MA? It was impossible to cooperate with them. And so matching will increase costs, home improvement is not necessary.
3. The purpose of lighting in two directions is to facilitate the use of power in the event of a breakdown. All the way to lighting can be used in another way. There is no need to touch the black spot to find a flashlight. (Some people will say that it can be divided into all the way. If the lighting is broken, you can use the socket lamp. Of course, but before the plug-in lamp has to be plugged in black, the desk lamp has a limited range of illumination. If it is a small apartment, such as one room and one room layout, lighting all the way is also possible, specifically want to sub-cost or to spend a little more than two-way or their own ideas. As for how to divide the two roads, it can be based on actual space. The simple point is the one on the south or the other on the north and the other on the bedroom hall. There are also points separated by north and south. This is very flexible and can be based on the needs of oneself. However, no matter how the points should be mastered certain principles, first, all the lighting lines must be strictly separated from the outlet line (otherwise the outlet leakage protection will not be used), the second is the power of the two road lighting should be roughly the same, the third is the bathroom does not belong to the lighting range.
4. The bus for the lighting circuit should be 2.5 squares, which is stipulated in the corresponding specifications. Each single luminaire can only use power of 1.5, as long as the power is not excessively large. But the lighting and all the outlets should be grounded. The original lighting is not equipped with a ground wire. Now the formal method is to bring it, because now the home is basically using type I lamps, and the regular manufacturers produce lamps. There are ground terminals on the ground. In fact, more than a few dollars can be added to the ground line, and the main reason is that it can guarantee the safety during maintenance. Circuit breakers do not have leakage protection, and DPN circuit breakers are suitable.
5. Hanging air conditioners also use DPN circuit breakers, which do not require leakage protection, because the air conditioners are plastic housings, the installation location is also high, and the human body is not easy to touch. I think that no matter how big the machine is, it's better to use 4 square meters. The air conditioner operates in a poor environment with high currents. The starting momentary current is also very large. With 4 squares, the wire aging rate can be reduced, and the wires and sockets can be guaranteed. There is a large contact area between the terminals, reducing contact resistance and temperature rise. Now, some homes use electrical fires because of socket quality problems or poor contact between terminals and wires. Each time a high-power appliance such as an air conditioner is started or stopped, the inserts and wires are heated up, and the temperature is continuously circulated. The tightness or contact surface is not enough or the wire diameter is not enough. A long time is a hidden danger. Of course, 2.5 for small power air conditioners can also be used, as long as the quality of the wires, sockets and wiring is guaranteed. According to the size of the house, reduce the number of air conditioners by one bedroom.
6. Common sockets, and and lighting, and generally divided into two, the same reason with the lighting shunt, of course, very small units can be all the way, large units and many electrical appliances have to consider more than two ways. The difference is that there should be an earth leakage circuit breaker (DPN VIGI in the figure means a DPN type leakage circuit breaker), and a wire of 2.5 square meters is more appropriate because the power consumption of such sockets is generally not too large and The probability of using all the sockets on the road at the same time is very low.
7. Each bathroom is a separate way, which is well understood. First, there are bath heaters, heaters, electric water heaters, and hair dryers, which are relatively high-power electrical appliances. Second, it may introduce fault potentials if they are in the same circuit as the outlets in other places. The separation of the host and guest circuits is also intended to use another bathroom when one of them fails. Here also use leakage circuit breakers and 4 square wire. In addition, if the instant-type electric water heaters are to be separately allocated to such water heaters in the distribution box. When there is only one guard, it is also reduced accordingly.
8. In general, the kitchen will only be enough, but some people have too much power in the kitchen appliances. A friend said that the total power of kitchen appliances it is preparing to purchase exceeds 10,000W (more than 7,000 W for an electric stove). Therefore, according to the actual situation to be divided, less than enough electrical appliances, more than two points. Each circuit here is also used with an earth leakage circuit breaker and 4 square lines.
9. The living room air-conditioner cabinet machine, most people use 3P, the current cabinet machine As far as I know only Mitsubishi Electric's 2.5-inch cabinet machine is with a plug, it's only with the power cord, the relevant manufacturer's instructions are also The tag is directly controlled by the circuit breaker. So here I think that in the wall of the cabinet near the location of the body to bury a separate 4-bit small open box instead of socket, which is fitted with 25A leakage circuit breaker, or according to the recommended value of air-conditioning manufacturers to buy (some manufacturers recommend 32A , but from the Gree Smurfs 3P cabinet machine actually used down 25A enough, winter and summer full power operation is no problem). Small open boxes are sold in the outlets where the outlets are sold; the reason for the use of leak protection is that the cabinet has metal parts, and it is easy for people to touch the metal side boards that may have leakage current.
Additional points:
1. The above figure shows the form of single-phase electricity entrance. If three-phase electricity is used, this is different from this.
2. All circuits should be ground (including lighting), and the wire diameter should be the same as the live wire zero line.
3. Except for the main gate, all air-openings using DPN-type (with VIGI letters indicating leakage-type circuit breakers) are better. They can automatically cut off the live and neutral wires in the event of overload, short-circuit and leakage, and are more reliable and occupy space. small.
4. The principle of selection of the circuit breakers and wires is described in the first paragraph of the above paragraph. In general, the 1. 5 square line is generally used for the sub-line of the lighting circuit and can only be opened with 10A. The 2. 5 square line is generally used for the common power socket circuit with 16A; 4 square lines are generally used for high power. Electric circuit, mainly with 20A, a few circuits with 25A; 6 square line separate circuit (such as instant electric water heater) with 32A.
4. Personally think that this is a more formal luxury configuration, if you want to be more economical, air conditioning and lighting circuit 1P circuit breaker can be used, according to the actual reduction of some loops, hanging air conditioning can be used small wires and so on.
5. Some people want to set up a separate refrigerator, because the long-term out of the other circuit breakers closed, leaving only the refrigerator to work. This of course can be, but personally think that is not significant, and increase the cost of wiring and the use of missing insurance.