Hydropower acceptance considerations
1. Whether electrical products are qualified products that meet relevant standards.
2, the use of fire-retardant dark pipe laying, wire should not have knots and kinks in the pipe.
3. It is forbidden to directly bury the wires in the plaster layer.
4, "Fire line into the switch, the zero line into the lamp", socket wiring should meet the "left zero right fire ground on the" provisions.
5, air conditioning and high-power electrical appliances should be set up alone, the line should use 4 square millimeters line.
6, power lines, television lines, telephone lines must not be installed in the same pipeline.
7. The switches and sockets are firmly installed and the position is correct. The cover plate is upright, close to the wall, and there is no gap around. After the installation of electrical engineering, electrical power should be provided, lighting test light, switch control and so on. After the completion of the project, the customer shall be provided with wiring drawings showing the wire specifications and directions.
8. The elbow should not be bent at the turning point of the electric pipe. It must be inserted into the pipe by a spring. The number of elbows under normal conditions should not exceed 3.
9, the color of the wire should also be implemented in accordance with the specification. Should be: red, blue, two-color line, white.
Pipeline installation
1. The pipelines are arranged reasonably, laid firmly, horizontally and vertically, and the switches and valves are installed neatly, which is flexible and convenient to use.
2. Hidden project, first close after acceptance, on the one hand you know how much to do, on the other hand know how to do it. For example, the water reform project does not do waterproofing after tanking. After the pressure test, “press to 8 pressures,†whether there is leakage, whether the water is smooth, and whether the water meter is operating normally. Water supply pipelines and accessories are not strictly connected. These hidden projects cannot cause problems, problems arise, and maintenance is difficult. Therefore, regular companies pay special attention to this piece. They often have specialized hydropower construction teams responsible for installation. Special equipment testing. Some small companies and decoration teams do not have pressure testing equipment, and they are often replaced by tap water. The quality is difficult to guarantee. The water pipes should use quality products such as Longsheng Pipe.
3, kitchen, bathroom to do waterproof, to do 24 hours closed water experiment, do not leak can not do. Re-spreading or installing ware breaks the waterproofing to redo. The shower area is 1.8 meters high.
4, the floor of the bathroom should be tilted to the ground drain, so that water can flow into the floor drain, no water.
Questions about construction
1. The power supply pipeline must not save money, especially the wall-buried pipeline, otherwise it will be a problem at the time, and it is difficult to repair it.
2. If it is permissible for wall-buried pipelines, it is better to use prefabricated pipelines. Prefabricated pipelines are independent of all pipelines. There are no three-channel pipelines. In this case, even if you want to replace lines or add lines, it is easy to use pipeline guidance lines. can be realised;
3, power, data, television, audio pipeline separate, due to the AC power magnetic field phenomenon, regardless of the pipeline, prone to signal interference, I think some people do not know why the TV is not clear, do not know why they want to go online Redial
4, the power line must not be able to use multi-stranded wire (core wire stranded by multiple strands of fine copper wire), multi-strand wire one bad heat, single core load capacity is poor, the most important thing is that it is prone to electrical corrosion (oxidation ), once the oxidation is easy to break the core, fever;
5, the power line must be into the pipeline, one to protect the power cord, and 2 to prevent moisture and short circuit;
6, buy a power cord must buy 2 layers of protective skin power cord, such a power cord will affect the cooling, but I believe we do not want their own circuit short circuit happen?
7, copper wire more than 220V AC, the general case of the next square can safely pass 3-4A of electricity, according to this principle, estimate their own electrical power, and then set aside a bit of redundancy, to buy the right size of the power cord In general, the use of household power cords is mostly 4 square lines and 2.5 square lines;
8, the power line should be divided according to the function of processing:
(1), air conditioning all the way, wire diameter 4 square;
(2), water heater all the way, wire diameter 4 square;
(3) Socket all the way (2.5 end / 4 square start);
(4), lighting all the way 2. 5 square;
9, and then separate according to different regions: 1, the kitchen line is recommended to use 4 square line, because the kitchen there are many high-power appliances, such as refrigerators, disinfection cabinets, dishwashers, range hoods, etc.; 2, the best bathroom lines Independence, because the area is very watery;
10, in the wiring cabinet to be installed on the air switch and leakage switch, generally said the kitchen, bathroom, electric water heater, socket, these lines need to add leakage switch, lighting is generally not installed, only installed air switch on the line, the air switch capacity Based on estimated power usage;
11. When paving pipelines, be sure to check that all lines must be insured. The joints between the pipes must not be jointed. All power lines cannot be connected in the pipeline. Ensure that the power line in the pipeline is a complete line. Contacts should be located in exposed areas such as switches and sockets!
The common problems of the electrician series are mainly
The circuit breakers, roads, and television signals of the distribution lines are weak and the telephones receive interference. Why do you have these problems?
1, excessive line joints and improper handling of joints are prominent reasons. Some lines are too long and some joints will be produced when the electrician operates. However, due to the limitation of technical level or lack of sense of responsibility of some electrician masters, it is not easy to wire, insulate and moisture-proof the connectors, and disconnection and short circuit will occur. Prevention Tips: Route to minimize connectors. If wiring is necessary, the distribution line must be well-connected, insulated, and moisture-proof. If conditions permit (under the appropriate engineering quotation), you can also use “涮†or use terminal blocks; the coaxial cable connection of the TV antenna is best. With a splitter or junction box, the telephone line is similar to a TV line.
2. There is no casing for the concealed wiring. The bushing is used to protect the concealed circuit from damage. If the bushing is not used or an inappropriate bushing is used, damage to the circuit during construction or in future use will leave you hidden dangers. Prevention Tips: Use concealed PVC wiring on the concealed wiring of the wall. Pay attention to matching the wire number. Minimize ground traces. In case the cable is to be routed on the ground, considering that it will be under pressure for a long time and it will be affected during construction, it is better to use the inner pipe of the water gas pipe to re-arrange the PVC pipe and fix it so that it does not move.
3. The completed line was damaged by subsequent construction. The common ones are: the wall line is interrupted by an electric hammer, and the floor nail gun penetrates the PVC line pipe or sheath line. Preventive techniques: Make a mark on the well-conceived lines to avoid unintentional destruction by the construction personnel in the next process.
4. Distribution lines do not consider different rated wires have different rated currents. “Little Marathon†causes long-term overload of the line itself. The selection of distribution line wires should pay attention to its rated current.
5, all kinds of different lines go the same line. If the television antenna, the telephone line and the distribution line are threaded into the same casing, the reception of the television and the telephone is disturbed. The TV antenna line and the telephone line are respectively taken out of the casing.
6, as much as possible to reduce the unnecessary joints, the use of the appropriate line pipe, all the attention should be paid to the construction of the line. Plumbing series: Common problems include leakage of water pipes, odors in wash basins and vegetable sinks, small water flow in bathtubs, inconvenience in the use of sanitary ware, and so on.
pipe leakage
Assuming there are no quality problems in the water pipes and fittings, we introduce the reasons for the leakage of cold water pipes and hot water pipes, respectively. a. Cold water pipe leakage is generally very easy to understand, that is, water pipes and pipe fittings are not sealed when connected. The construction personnel may be required to bind the sealing material PTFE belt (commonly known as the raw material belt), and pay attention to some plumbers who use plastic bags to “hit thingsâ€. b. In addition to sealing the hot water pipe leak is not done well, the home generally refers to weak electricity for the telephone, television, broadband, etc., strong power for the power line. The two can not be worn together in a tube, parallel distance of 300mm or more.
Strong electricity (220V or 380V and other power lines) weak electricity (television and TV AV broadband alarm monitoring intercom and other transmission signal cables) can not be together when wiring! The parallel cable casing is laid more than 50CM apart and the outlet is more than 20CM apart. The TV is a weak signal and the higher frequency signal will affect the low frequency telephone and broadband signals.
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