Tutorial materials of household water and electricity installation specification

Specification sticker for water and electricity layout of home decoration

A, drainage engineering

Water supply and drainage works include the installation of pipeline accessories and various nozzles, angle valves, water supply fittings and indoor drainage works.

Basic requirements:

1, the horizontal line must be tested before entering the site to check whether the original water pipe is unblocked;

2. The original household power supply (meter capacity, incoming line size), telephone line and broadband information network can be adjusted;

3, on-site inspection of household appliances, lamps and switches, sanitary ware position is consistent with the drawings or whether there is any omission, if there is any discrepancy, should be adjusted according to the actual situation;

4. Unless otherwise specified in the design, the hot and cold water pipes are all made of steel-plastic pipes, with a unified head of 20mm and a charge of Ф16mm; Check whether the pipeline is unblocked before installation;

5. Don't arbitrarily change the nature and location of waste and sewage discharge such as drainage pipes, floor drains and toilets. (except in special circumstances) the drain pipe must have a trap to prevent odor from coming up;

6. All steel pipes are connected with threads and lined with hemp, thick paint or raw materials. The acceptance of the pipeline shall meet the requirements of Supercharging; = 0.6Mpa for 20 minutes, the pressure in the pipe will drop.

7, pipe installation should be horizontal flat vertical, laid firmly, PVC sewer pipe must be glued, the slope meets the requirements of 35/ 1000;

8, pipe installation shall not be close to the power supply, and under the wire tube, crossing the need for excessive bridge bending, water pipe and gas pipe spacing should be not less than 50mm；;

9. The water pipes leading to the balcony must be valved to avoid joints;

10, the distance between hot and cold water pipes and their heads must be determined according to the actual size of the faucet. Two leads (the center of the exposed lead must be extended by 30 mm with galvanized pipe to ensure parallel installation in triangle valve in the future) must be on the same horizontal plane; The exposed guide plate shall be leveled and not less than 10- 15mm, and fixed with cement mortar. The depth of hot water management entering the wall should ensure that there is a cement mortar protective layer above 15mm outside the pipe to avoid hot glaze cracking (except in special circumstances). Long-distance hot water pipes must be treated with heat preservation materials.

1 1. Normal height of exposed head (all net dimensions)

Shower 1000 mm

Shower room 1000 mm

Bathtub 650 mm washbasin (under the stage) 500 mm

Kitchen sink 600 mm

Wash basin (below the stage) 600mm washing machine machine height +200mm.

Water heater (1200- 1600 mm)

(or on-site decision)

12. After the preliminary project is completed, install 1-2 temporary faucet on site (low faucet is the best period), and provide a list of materials (specifications, quantity and types) needed in the later period, so that customers can arrange their own time to purchase.

13, sanitary ware installation must be firm, not loose, smooth drainage, everywhere connection seal without leakage; Water for 2 hours after installation, and check by visual inspection and hand feeling method;

14, toilet installation must be sealed with putty or silica gel and butter roll. It is forbidden to use cement mortar to fix it. Swimming pool launching and bathtub drainage must be connected by hard pipes.

15, all sanitary wares and their accessories should be inspected before and after installation to see if they are damaged. After the installation of the project, all water sanitary wares shall be thoroughly inspected;

Second, the electrical engineering

Basic requirements:

Electrical products and materials must meet the requirements of product standards and safety standards, and electrical construction personnel should hold relevant certificates.

1, the size of distribution box set for each household must be determined according to actual needs; Every household must be equipped with a master switch (two poles)+leakage protector (the position is required to be 4 single-chip microcomputer, and the circuit breaker is a qualified product). Each open circuit and wiring should be set in strict accordance with the drawings, and each open circuit should be marked with the old circuit. Distribution box installation must have a reliable grounding connection;

2. Confirm the brand of switch and socket with the landlord, verify whether the doorbell and door light are electrified, and check whether the drawings are consistent with the site. If not, it should be adjusted and signed with the consent of the customer;

3. Single copper wire of Zhongce BV is used for electrical wiring, and BBR soft copper wire is used for grounding wire. Buried in PVC (except hollow floor and cast-in-place roof slab), horizontal and vertical, along the corner of flat roof. There is no suspended ceiling, but there is an 80mm paste Yinjiao line, the time limit is 20mm, Ф15 mm, and it is forbidden to put pipes on the ground. Wiring in strict accordance with the drawings (lighting trunk line 2.5mm2, branch line 1.5mm2). There should be no joints and kinks in the pipeline, and a new pipeline should be used. The old line shall be delivered to the owner at the time of acceptance. It is forbidden to bury wires directly in the ash layer (BVV sheath line is used when encountering mud and concrete);

4. The total cross-sectional area of wires in the tube shall not exceed 40% of the cross-sectional area of the inner diameter of the tube. Several roads with similar lighting can penetrate into a tube, but the total number of wires in the tube shall not exceed 8;

5. Incoming lines of telephone lines, TV lines and computer lines shall not be moved or closed. It is forbidden to install weak current and wires in the same pipeline (including cross switch, socket box and its cassette), and the pipeline is straight from the corner of the ground;

6. It is forbidden to change the position of gas pipeline and header at will. The distance between the conduit and the gas pipeline shall not be less than 100mm in the same plane and not less than 50mm in different planes, and the distance between the electrical socket switch and the gas pipeline shall not be less than150 mm; ;

7. The reserved conductor length in the box is 150mm, and the reserved flat top line must be labeled. The connection is that the phase line enters the switch, the zero line enters the lamp holder and the zero line enters the lamp holder. When facing the socket, ground left and right; Switch socket installation must be firm, in the right position, close to the wall. In the same room, the boxes are on the same level;

The normal height of switch and socket (calculated by the old floor) must be based on the horizontal line when installing.

Type general fission

Air conditioning vertical

Air - conditioned room

Television program distribution

The bedside lamp of the range hood is plugged into the kitchen with a special socket and switch.

(power supply) socket

Height 300mm 2200mm 300mm 700mm 2200mm (intermediate deviation1500mm) 600mm1100mm. Adjust according to drawings or actual conditions.

Turnout height 1300mm.

9. During the preliminary working hours, lighting lamps and sockets, distribution boxes and protection switches are installed in each room, all power sources are connected, and wires and pipes are led out. And provide the later material list (specification, brand, quantity, model) to facilitate the landlord to arrange time to buy;

10, lamps, plumbing and kitchen hardware distribution, anti-fog mirror (common mirror installed by carpenters) enter the site and check again to see if there is any damage.

1 1. Live working is strictly prohibited (when live working is required under special circumstances, one person must be present). After the installation of the project, all lamps, electrical appliances, sockets, switches and electric meters shall be tested and inspected, and their positions shall be accurately marked on the distribution box and arranged in sequence.

12. When the concealed works are accepted, the drawn lighting, sockets, weak current diagrams and pipes will be printed into drawings with the help of the designer after being signed by the customer, and one copy will be submitted to the engineering department and the customer (keep a low draft);

13, the team leader must work on site and be present at the acceptance. After the completion of the early and late projects, it is necessary to do a good job of cleaning up so as to clean up after work.

14, before the paint enters the site, conduct a comprehensive re-inspection on the strong current and weak current;

Code for acceptance of hydropower technology

Project standards and test tools requiring test methods

Pipelines, pipe fittings or valves shall not be loosened, and the pipes shall be firmly fixed. The distance between water pipes and gas pipes shall be coplanar > 100mm, and different surfaces > = 50 mm Visual inspection, hand feeling and water test shall be conducted.

1, whether the pipeline layout meets the design requirements, and randomly select 3 places.

2, pipe installation is fixed, comprehensive inspection without looseness.

3. The downpipe shall be unblocked and the water meter shall operate normally.

4, the pipeline is unblocked, the connection is free of leakage, and the faucet and valve are flexible to open.

5, water pipe installation shall not be close to the power supply, water pipe and gas pipe spacing with a steel tape measure.

6, pipe installation horizontal flat vertical, slope meets the requirements, and in a timely manner with pipe wood fixed random three horizontal dimensions.

7. The water pipes leading to the balcony must be checked visually with valves.

8. The pressure test of the pipeline is about 0.6Mpa for 20 minutes, and the pressure drop in the pipeline is less than 0.05Mpa. The pressure pump is fully inspected for pressure test.

electrical engineering

1, all kinds of electrical switches and distribution boxes must be installed with complete electrical inspection certificates.

2. Check the electrical circuit before sealing the groove.

3. Indoor wiring should be tested before laying a comprehensive inspection and sealing groove.

4, the power cord, telephone line, TV line, computer line is strictly prohibited in the same tube full inspection steel tape measure.

Inspection before groove sealing

5, insulation resistance test full inspection megohmmeter

6, installation panel comprehensive inspection visual inspection

7, socket height from the ground fully visual and feel.

steel tape measure

8, wire, switch connector and gas pipeline spacing (mm) with a steel tape comprehensive inspection.

9, it is forbidden to use zero line and grounding line mud, the position of the leakage grounding line is fixed, and in accordance with the provisions, choose the same color full inspection tester.

10, telephone line, network line, TV line, speaker Check all multimeters and testers.

The first step of hydropower transformation is hydropower positioning, which is to determine the position of switch socket and waterway interface in the whole house according to your needs. The plumber should draw the line between the outlet pipe and the electric wire on the wall according to the faucet position of the switch socket, that is, arrange the lines well. Remember to ask your decoration team for the water and electricity diagram, and let the plumber explain the route direction to you according to the diagram. Don't be afraid of trouble, the plumber will certainly meet your requirements. If you don't sign after the hydropower transformation, the plumber can't get it from the decoration team leader.

After hydropower positioning, the next step is to make a trough. The grooves made by good beauticians are basically straight lines, and there are basically no bristles on the edges of the grooves. Note that before slotting, be sure to ask the plumber to mark all the hydropower trends on the wall, and remember to compare them with the hydropower map to see if they are consistent.

There are several points to be noted about hydropower transformation:

1, it is best to indicate the brand of wires used for circuit transformation in the contract.

2, the switch of the whole house should be basically in the same horizontal position.

3. The sockets in the whole house should be in the same horizontal position as far as possible, except for special sockets such as air conditioners and refrigerators and those with special requirements.

4. The colors of phase line and zero line in circuit transformation should be the same in every room. If possible, it is best to indicate the colors of live wire, zero wire and control wire in the contract, and the protection wire is yellow-green.

5. It is best to use 3 wires with more than 4.0 strands for socket wires (including air-conditioned refrigerators) and 2 wires with more than 2.5 strands for lighting wires.

6. The bottom box is buried underground. If possible, you'd better buy the bottom box yourself. Please report the installation fee to the decoration team.

7. As for audio cable, if you are not a professional enthusiast, it is best not to install audio cable: the housing area in Shenzhen is basically around 100 square meter, and the living room area is generally not very large. Ordinary people really don't need to install sound effects in such an area. Air traffic control is also silver.

Regarding the waterway reconstruction, I think it is necessary to say: regarding the boiling water, in terms of the weather in Shenzhen, do washbasins and kitchen sinks need boiling water? If you need hot water, just turn on the water heater. When decorating, I only sigh that it is so easy to make money and spend money!

Finally, it should be noted that it is best to indicate in the contract that carpenters must enter the site after the completion of hydropower transformation. The advantage of this is that you don't have to pay attention to two things at the same time. Hydropower transformation is a very important expenditure in decoration, and it is also a large part of the profit of decoration company. Moreover, the hydropower transformation is very hidden. If carpenters enter the site at the same time, it will distract you from the hydropower transformation. When the waterway is rebuilt, pay attention to the cleanliness of the surrounding area. When signing a waterway reconstruction contract, it is best to indicate the materials used for waterway reconstruction. In addition, attention should be paid to the size of the original sewer in waterway reconstruction, and the pipes connected with the original sewer in the house should be matched with the original sewer.

In the circuit transformation, attention should be paid to where the lamps in the whole house are installed in advance to determine the position of the switch socket, and at the same time, attention should be paid to the different prices of newly buried wires and replaced wires. It is best to buy a wireless doorbell when buying a doorbell.

Please note the following points:

1. Availability: Whether the position of the switch panel is convenient to use and reasonable should be considered comprehensively.

2. Availability: hydropower home improvement projects account for a large proportion in the expense report, generally around 1/5 (basic decoration), and avoiding impractical wiring can save a lot of money.

3 correctness of wiring: when wiring water and electricity, try to shorten the wiring distance and reduce unnecessary waste. However, care should be taken to ensure that wiring on walls and floors is horizontal and vertical. When laying pipelines, bending should be minimized. When the length of the straight line section of the line exceeds 15m or there are more than three right-angle bends, an intermediate junction box shall be added. Ensure convenient and straight maintenance in the future.

4. Stability: the circuit wiring should be protected by PVC pipes, and there should be enough distance between strong and weak current to avoid affecting weak current signals. Indoor wiring of TV, telephone and network cable is not allowed to connect in series.

5. Safety: The water supply pipeline shall be subjected to pressure test and the drainage pipeline shall be subjected to leakage test.

6. Finally, there should be a road map or real photos of the water circuit for reference when installing other electrical appliances in the future to prevent damage.

* Basic requirements

You must hold an electrician certificate issued by the competent administrative department of the state before you can take up your post, and you must operate and construct in strict accordance with the relevant national electrician specifications and hydropower technical specifications.

We must actively seek the opinions of the owner, patiently listen to the requirements of the owner, and determine the positions of power switches, water level gauges, hot and cold faucets, etc. Construction can only be started after the owner is satisfied, so as to avoid rework caused by poor communication.

All the main materials and auxiliary materials in the circuit and waterway reconstruction adopt national certified products.

Strong and weak current lines and waterways should be laid in the wall with a spacing of more than 500MM, and exposed threads should be bandaged during construction.

After the water and electricity decoration is completed, the construction personnel shall draw the completion drawing of water and electricity transformation according to the actual location and submit it to the company for the record.

* electrician construction specification:

The temporary power supply on the construction site should be equipped with complete plugs, switches, sockets and leakage protectors, and cables should be used for temporary power consumption.

The power cord is divided into three colors: red is the live wire, blue is the zero wire and yellow is the ground wire. All one-way sockets shall be connected with "left zero and right fire in the middle" or "zero fire".

The power supply lines of sockets, kitchens, toilets and bathrooms in each room should use leakage protectors independently and must be connected with other power supply lines, and the zero line should not overlap with other lines.

High-power electrical appliances such as air conditioners must be equipped with special power supply circuits. The air conditioner adopts 4M2 power supply line, the lighting line adopts 1.5~2.5M2 power supply line, and all power outlets shall adopt 2.5M2 power supply line. Other power supply loads refer to this standard.

All wires entering the wall are buried with 20% PVC smoldering pipe sleeves, and connected with elbows, direct connectors and wiring connectors. There should be no connector at the bottom of the box, and the power cord should not be exposed on the ceiling or directly plastered into the wall with cement to ensure that the power cord can be pulled out or replaced.

Under special circumstances, when the power conduit passes underground, special attention should be paid to the close connection with the underground casing, and elbows must be applied where there is no joint source line in and out of the underground. Before the ground is closed, the PVC casing must be protected and not damaged. When laying floor tiles, PVC sleeves should be completely covered with sand. When nailing the wooden floor, the power cord should be laid along the corner to prevent the power cord from being damaged by nails.

The power cord shall be horizontal and vertical, and shall not be pulled obliquely, and avoid the installation position of wall mirrors, furniture racks, etc. to prevent damage by electric hammers and nails. When the power cord is buried underground, it should not be considered to keep a distance of more than 500MM from the electric heater, water tank, water pipe and weak current pipeline.

The power cord tube should be fixed in the wall groove in advance, and the surface of the sleeve should be recessed into the wall 13MM or more (the depth of the wall groove > > 33MM).

Upon inspection and approval, after the power cord connection is qualified, the wall should be wet and sealed with 1:2.5 cement mortar. The concrete surface shall be smooth and 2MM below the wall surface. The power box should be installed firmly, and the bottom of the panel should be flat and consistent with the wall.

The power supply of air conditioner should be 16A= = hole socket, the socket with protective door should be the height that children can reach (below 1.5M), and the bathroom should be splash-proof socket, with the installation height not less than 1.3M, and away from water sources. In order to live comfortably and conveniently, the bedroom should be equipped with double control switches, and the kitchen power socket should be connected in parallel.

There should be more strong and weak electrical outlets, and there should be power outlets and telephone outlets on both sides of the bed. There should be three power sockets near the computer desk in the living room and on the background wall of the TV cabinet, and corresponding sockets for TV, telephone, multimedia and broadband network should be set.

The switch box is generally1.2m above the ground, and a multi-purpose socket is used in one room.

The height of all sockets and switches from the ground shall be greater than 300MM, and the height of sockets and switches in the same room shall be the same (when installed side by side, the height difference < 5 mm is the height difference < 1 mm, which will not be blocked by sliding doors, furniture, etc.

The installation direction of the rocker switch is the same, and the lower end is pressed to turn it on, and the upper end is pressed to turn it off. When fastening the socket switch and panel, use matching screws, and do not use wooden gong nails or gypsum board screws to avoid damaging the bottom joints.

For lamps with metal shell, the metal shell should be reliably grounded: the live wire should be connected to the central contact of the nut; Spotlight has a high calorific value, so you should choose a lamp holder with a yellow wax tube on the wire. After connecting the wire, the wire of the lamp holder should be scattered.

The laying methods and requirements of weak current lines such as audio, television, telephone, multimedia and broadband network are the same as those of source lines. (Avoid high-voltage lines) Its socket or box is installed in parallel with the power socket, but weak and high-voltage lines are not allowed to be in the same pipe and set with an interval of more than 500MM.

What the bottom box needs to do is to let the sound line in and out of the wall, which is located behind the speaker and there is no open line on the wall. When not in use, the stereo can be placed in the bottom box and covered with a panel.

If the customer has no special requirements, the telephone lines in all rooms should be connected into one number. If there is a number box on the floor, the telephone line should be connected to the number box. At the joint of multi-core telephone line, the casing hole should be tightly wrapped with adhesive tape to avoid the telephone line from being damp and crosstalk.

Inspection method for installation quality of strong and weak current: one end of weak current line is short-circuited, and the other end is measured. The power socket is tested with 220V light, and the insulation strength between lines is measured with megger. The insulation strength between lines is > > 0.5MQ, and the telephone line connector must be a special connector.

* Code for Hydraulic Building

When water conservancy engineers enter the site, they should first do water storage tests on the kitchen and bathroom, and then go downstairs to observe whether there is any leakage after 2 days. If there is any leakage, the owner shall be notified in time for waterproof treatment.

The direction and arrangement of double water supply pipes should be reasonable and should not be inclined or crossed.

Waterway reconstruction adopts aluminum-plastic pipes and edge fittings. Before installation, water pipes and connecting fittings must be inspected for damage, sand holes and cracks.

The installation position of water meter should be convenient for reading, and the distance between water meter and valve and wall should be appropriate for easy use and maintenance.

In the wall and underground, use as little or no connectors as possible to reduce the hidden danger of leakage. Connectors should be installed firmly without leakage.

The two reserved openings of the double water supply faucet should be at the same horizontal line and symmetrical with the axis of the basin and pool, and the central axis of the reserved opening plane is perpendicular to the wall surface.

The height of the water inlet (elbow) on the wall should be appropriate, it should be easy to maintain, and the hose should be exposed as little as possible, and no extra hose should be connected, giving people a simple and beautiful vision. For sanitary wares classified by columns without cabinets below, the height of the reserved opening should generally be about 600MM on the ground.

The lower outlet of the column basin should be located at the bottom center or behind the column, and cover the column as much as possible. The drain pipe of hanging-free washbasin (without column or cabinet) must be horizontally arranged with the elbow out of the wall (that is, the drain pipe enters the wall).

Water supply pipes with cabinets, washbasins and vegetable basins should be led out from the wall and cabinet backboard with elbows, and the height should be about 300MM higher than the bottom of the cabinet (400MM from the ground), not from the bottom of the cabinet. The faucet is generally 1- 1.2 meters from the ground and 30-40 cm from the washbasin.

After the pipeline connection is completed, the reserved elbow should be blocked in the wall groove by blocking the line, the water valve should be closed and the pressure test should be carried out. The pressure test pressure should be 0.8 MPa, and it is qualified if it is not reduced for 24 hours. At this time, you can seal the water pipe into the wall.

The ambassador's launching should go directly into the main sewer pipe and must be equipped with an underwater pipe head to prevent odor.

The floor drain must be placed at the lowest point of the ground.

Cabinets and washbasin cabinets should avoid the sewer pipe being set at the edge of the cabinet door and the center of the cabinet body, and the gap between the sewer pipe and the bottom of the cabinet body should be sealed with latex water scraps.

After the installation of the drainage pipeline, the water flow test should be carried out to ensure the smooth underwater flow without leakage and overflow.