Standard hydropower installation drawing
1 Before construction, there should be electrical (strong current and weak current), water supply and drainage design and construction drawings.
2. It is strictly prohibited to lay wires directly in walls, floors, floors or ceilings without any protection.
3, different voltages, different circuits, different signal lines are strictly prohibited to wear in the same threading pipe.
4, the installation of lamps and lanterns should be carried out after the completion of painting. When installing lamps and lanterns on brick-concrete structures, it is forbidden to use wooden wedges, hooks, bolts or expansion bolts. There shall be no less than 2 bolts (or screws) for fixing lamps. Lamps and lanterns shall not be installed on combustible components.
5. The switch of lamps and electrical equipment must be installed on the "phase line" (that is, the control phase line), otherwise, after the switch is turned off, lamps and electrical equipment will still be charged, which is easy to cause electric shock.
6. There are two protection methods for power system: grounding protection and neutral point protection. At present, grounding protection is widely used in China. Note that in the same system, it is forbidden to use two protection methods at the same time, otherwise it will cause safety accidents.
7. It is forbidden to use the mobile switch beside the bed. If the lamp uses a screw cap, the central spring tongue of the screw cap should be connected to the control phase line.
8, line interface should be smooth, even the board connection should be firm. The junction box of the power inlet box shall be protected by a protection ring (lock nut).
9. In order to update and maintain the conductor in the future, the radian (i.e. cold bending radius) of the bend of the conduit buried in the wall, underground or ceiling should be 5~ 10 times the diameter of the conduit.
10, it is forbidden to connect wires in the threading tube, that is, when the length of wires is not long enough, the connectors of wires cannot be in the threading tube, and wires should generally be connected in junction boxes such as switches, sockets and lamp holders.
1 1. The conduit should be of a certain size (thickness), so that the conductor can pass through it and enough open space should be left to dissipate the heat generated when the conductor passes through a large current. The ratio of the cross-sectional area of general conductor to the cross-sectional area of threading pipe is 1/3~ 1/2. It is forbidden to block the threading pipe with wires.
12.PP-R pipes and copper pipes can be used for water supply.
13, hidden water supply pipeline must strictly check whether all connection parts are installed tightly, firmly and in the right direction, and then do water pressure test and test the water for a period of time before embedding.
14, the horizontal pipe of the drainage pipe should have a certain slope, and the socket should be closely connected to ensure no leakage. The distance between the bracket and elevator for fixing the pipeline is reasonable and firm.
15, sanitary ware installation position should be accurate, bracket, bracket installation should be smooth and firm. The floor drain should be installed at the lowest point of the ground and 5 mm deep into the ground. The joint between the toilet and the ground or the nozzle should be sealed with sludge or silica gel. If the cement is not suitable, it will expand and cause the bottom of the toilet to crack.
16. The hot water faucet in the hot and cold faucet should be installed on the left side. Electric water heaters should have grounding protection devices. When it is used for the first time, the air in the bladder should be removed, and it can only be electrified after it is filled with water.
Matters needing attention in hydropower installation
1, calculate the approximate dosage.
Before installing water pipes, estimate the consumption before purchasing materials, so as to avoid waste or lack of materials and affect the installation process.
2. Inspection of water pipes and fittings
Before installation, check the water pipes and their fittings to see if there are any problems such as damage and leakage. The connection between water pipes and fittings must be correct and firm, and installed after testing.
3. Direction of water pipes
It is suggested that the water pipe top is the safest. The main reason is that most of the waterway reconstruction adopts concealed pipes, and the water is characterized by downward flow. If the pipeline is underground, once it leaks, it is difficult to find it in time. Only when water overflows Jinshan or the floor is deformed and leaks downstairs will it be found, and because the water pipe is buried underground, it is difficult to find out the leaking place. At this time, the huge loss is irreparable, and even seriously affects the friendly neighborhood relations; If the water pipe reaches the top, the cost of water reform may be higher, but it is still worthwhile as a long-term investment. Even if the water pipe leaks, it can be found in time, with convenient maintenance and less loss.
4. Test after installation
After installation, pressure test must be carried out. The pressurization test is generally carried out under the condition of 1.5 times of water pressure, and there should be no water leakage during the test.
1) Close the main water valve. (that is, the water pipe switch in front of the water meter)
2) Turn on the faucet in the room for 20 minutes, and then turn off all the faucets after ensuring that there is no dripping.
3) Turn off the water inlet switch of toilet water tank, washing machine and other equipment with water storage function.
4) Open the main water valve.
5) After opening the main valve for 20 minutes, check whether the water meter moves, including moving slowly. If there is any movement, it is leaking. If you don't move, you may be fine. If there is something wrong with the water meter or the water pipe leaks slightly, it may be difficult to determine. Therefore, it is suggested that the water pressure test must be carried out after the construction, generally 8 kg for 20-30 minutes. (You'd better see for yourself)
5. Draw a channel map
After the water pipe is installed, you should draw a room waterway map to facilitate future maintenance.
The above is the complete introduction of standardized hydropower installation drawing, hoping to bring help to everyone. Water and electricity installation is a part of the house, and its safety and convenience have a great relationship with the comfort of everyone's house. I hope everyone knows the relevant knowledge of water and electricity installation, and then you can pay attention to some details when installing water and electricity! Ensure the safety of water and electricity at home!