>>>Related Links: Five Precautions for Hydropower Construction
In home circuit construction, special attention needs to be paid to the following points:
A. Construction personnel should have a post operation certificate issued by the local labor department within the validity period.
B. The materials used should be national standard products or have safety certification marks (Beijing Great Wall mark) to ensure the safe service life.
C. Construction shall strictly comply with the specifications and process standards.
1. When carrying out various line shift transformations, first determine the position of the line terminal socket, and draw the exact position and size on the wall surface. Then, proceed to the nearest similar socket lead and the lead method is: if the socket is in the wall The upper part of the wall is vertically slotted upwards to the top of the wall where the decorative corner line is installed; if it is in the lower part of the wall, it is vertically slotted downward to the bottom of the skirting board. The groove depth is about 15 mm, the wire conductor is loaded into the sheath, and it is placed in the wall groove and smoothed with cement mortar to fix it in the wall. If the original socket is reserved, reinstall it in its original position. If it is not retained, block it with cement mortar after filling it with bricks. The wire along the ground, when installing the skirting board, lies on the inner side of the bottom of the skirting board. The wire along the top corner is concealed inside the decorative corner line when the decoration line is installed.
2. The construction specifications of the circuit renovation project should be consistent in terms of the depth of the trench and the top of the slot line. After the control line is ejected on the wall, the wall surface is cut with a marble machine to manually slot. When installing the circuit, the bushing must be added. The connection of the bushing should be tight and smooth. The corner inside the corner should be cut and the arc-shaped interface on one side of the incision should be cut and installed. After the wire is installed into the casing, the wire fixing clamp should be used. After the wire is fixed in the wall and the wall surface, it is concealed by plastering or concealed by the skirting board and the decorative corner line. The installation of the outlet box shall be preceded by a hole in the wall. After the wire is inserted into the box, the box is placed into the hole and the wire is fixed to the panel and the panel is fixed on the box. The method of installing the power switch is the same as that of the outlet box.
3, copper wire should be used, and according to the use of capacity to configure. Not too thin. It is recommended that the wire diameter of the air conditioner should be 4 square millimeters of wire; the socket should use 2.5 square millimeters of wire; and the general lighting fixture should use 1.5 square millimeters of wire. When wires are routed through the hollow floor, they must be piped; wires of different voltages such as lighting lines, telephones and television lines must not be put in the same pipe; the power outlet panel should be the left zero line, the right phase line, and the upper ground line. Wrong; zero line, phase line, ground wire with different colors.
4, the wiring application of the dark pipe wiring construction, electrical wiring, the dark pipe laying requires the use of PVC pipe, open wiring must use PVC trunking. Avoid cracks on the wall caused by the pick-off during construction to destroy the wall structure. When laying, the number of conductors used in the pipe should be changed according to the number of conductors. Within the same pipe, it should not exceed four. It is forbidden that the conductors will occupy the space in the pipe. Air conditioners, lighting, and outlets should be shunted and controlled, usually at least four ways. Lighting goes all the way, air conditioning goes all the way, socket goes three to four ways. The advantage of this is that once a circuit has a short circuit or other problem, the scope of power outage is small and it will not affect the normal operation of other circuits.
The distance from the power line to the telephone line and TV line should be greater than 50 cm. The pipeline should be fixed with the structure. The junction box should be installed at all switches, sockets, and lamp positions. In addition, if the pipeline is too long or there are too many corners, a junction box should be set at a certain distance. No wire connector is allowed in the pipe. The bent position of the wire protection tube should use the matching elbow tool or matching elbow, and there should be no folds. The distribution control switch should be reasonably configured according to the specifications. If the configuration is too small, it will cause inconvenience in use. If it is too large, it cannot guarantee the safe use of electricity. Another important point is that during construction, the pipeline should be installed first, and then the conductors should be used. This avoids the possibility that the wire cannot be twitched when the line is changed in the future. Also to remind you is that when your home improvement project is completed, don't forget to ask the construction unit for a set of electrical circuit completion drawings for your future maintenance.
First, how to do waterproof experiment?
Plug the floor drain of the kitchen and bathroom, add water not less than 2 cm deep inside the room, and see if it leaks after 24 hours.
Second, the following situations do you want to waterproof?
1, hydropower reform, slotted to destroy the original waterproof layer, to redo waterproof.
2. The rough room has been waterproofed. Does it need to be destroyed and re-do it? After doing the water shut-off test first, you can do nothing if you do not leak.
3, after the bathroom tile knocked out do not have to do waterproof? The original waterproof has been destroyed to re-waterproof.
4, the kitchen should do to prevent water? It's best to do it just in case you miss someone's home and cause trouble.
Third, how to do waterproof?
The self-leveling layer returns 30 cm to the wall. Shower and walls with waterproof requirements, back 180 cm high. The waterproof coating should be applied completely, without omissions, and it must be firmly bonded to the grass roots, without cracks, without bubbles, and without falling off. The brushing height is the same. The thickness must meet the product requirements. Acrylic waterproof coating in paint is better than polyurethane waterproof coating. It is a new type of paint, no pollution, anti-aging, good toughness.
4. After the construction of the kitchen, bathroom, and waterproof layer is completed, a water seepage test must be done, and the company and the owner can determine the surface layer after passing the test results. If you do not do a water shut-off test or if the test is not qualified, you will make a surface layer. When leaking water in the future, only the surface layer will be completely removed and you will start again. Therefore, whether the concealed project is in progress or completed, the customer must carry out measurement and acceptance, clarify the responsibility and avoid hidden dangers.
5. In the construction and transformation of water pipes, it is necessary to prevent the clogging of sewers. Before construction, it is necessary to do a closed protection for the outlets and floor drains to prevent the entry of cement, gravel and other debris. Once the cement and mortar block the passage, it will be extremely difficult and will cause great trouble.
Sixth, water reform project
Pay attention to the direction of the pipeline. The wall in the house is not allowed to be slotted, and the wall with insulation after the slotting, it is easy to cause cracking on the surface, and in the ground slot, we must be careful not to damage the floor, to the residents downstairs Create trouble.
7. What kind of pipe quality is the best for the water supply and drainage project?
Experts said that at present, copper pipes are the most used in the world. Copper pipes have obvious advantages in terms of high and low temperature resistance, strength, environmental protection and hygiene. Copper pipes occupy a monopoly in water supply and drainage systems in developed countries or regions. For example, in Hong Kong, copper pipes account for about 70% of the market, and domestic water systems in residential buildings are required to use copper pipes. Older developed countries such as the United Kingdom have higher copper penetration. However, in China, the use of copper pipes has been low. In the Beijing market, there is an optimistic estimate of about 10% utilization rate, mainly concentrated in high-end users such as five-star hotels and high-end residential communities. However, the cost of copper pipes is high.
As the galvanized pipe is apt to rust, foul, not keep warm, and will be frozen, it will be phased out. At present, the most used are plastic aluminum composite pipes, plastic steel pipes and PPR pipes. These tubes have good plasticity and toughness, and the insulation does not crack or foul. The use of special copper joints or thermoplastic joints guarantees quality assurance and low energy consumption. However, at present, there are many counterfeit and inferior products in the PPR pipeline. The market is not standardized and must not be greedy and cheap.
8. The movement of the gas pipeline gas pipeline and the installation of the water heater must be carried out by the gas company to ensure that no gas is leaked. It should not be too hidden to prevent gas leaks.
Nine, check whether the drainage is smooth. It is mainly the place where the bathroom and the kitchen are drained, so the ground leveling should have a certain slope (2%) to ensure that the water collects on the surface into natural water flow and eventually flows to the floor drain. However, care should be taken not to overemphasize the slope simply for the smooth flow of water, because the slope will be over-sloped, which will affect the appearance and non-slippage.
Tenth, we must do a good pressure test. Use a press to hit 6 to 8 atmospheres (0.6 to 0.8 Pa) for 30 minutes with no leakage. Can not be replaced by tap water (usually because the construction team does not have this equipment, it is often used to trick customers).
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