A, material tips:
1. Financial management should choose brand products that meet national standards.
2. The materials must be consistent with the product names listed in the company's engineering quotation.
3. The cross-sectional specifications of the conductor used are 2.5mm2, 4mm2 and 6mm2, and there is no tension, and the conductor core will not be hurt by firm binding, and there are no defects such as kinking, dead bending and insulation damage. The colors of the conductor used should be distinguished.
Second, the temporary electricity consumption
1. The plug, switch, socket and leakage circuit breaker shall be complete for temporary electricity utilization on the construction site, and cables must be used for temporary electricity utilization.
2. When entering the site, remove all wires of the air switch, and then connect it to the temporary junction box from the main incoming wire. The construction team shall provide its own distribution box, including leakage switch, air switch and socket with protective device, and the cables shall be in good condition.
3, including cutting machine, angle grinder, electrical data, hand drill, impact drill and other power tools, after inspection, insulation performance should be intact, safe and reliable use, correct operation method.
Third, the construction technology
(1) Slotted pipeline and positioning
Circuit design should be multiplexed, so that air conditioning, kitchen, bathroom, living room, bedroom, computer and high-power electrical appliances are wired separately; Socket and switch should be separated. Except for general lighting and wall-mounted air conditioning, each loop should use a leakage protector separately. Strong and weak current should be separated, and the design of weak current lines such as audio, telephone, multimedia and broadband network should be reasonable and standardized.
1. Before slotting on the wall and the ground, thread the ink cartridge for positioning. The surface of the pipeline and the wall surface should be left with a powder ash layer of about 15mm to prevent the wall surface from cracking.
2. Without permission, public electrical facilities such as lightning protection grounding wire and protective grounding shall not be destroyed or changed.
3. When the power line pipe is buried, the distance between the power line pipe and the weak current pipe should be more than 500mm, and the parallel distance between the power line pipe and the hot water pipe and the gas pipe should be not less than 300mm.
4, through-wall conduit to minimize turning, and avoid the installation position of through-wall mirror, furniture, etc. To prevent damage by electric hammers and nails.
5. Unless otherwise specified, in the same suite, the switch is between 1200- 1500mm from the ground, away from the door 150-200mm, and the socket is about 300mm from the ground. The socket switches are on the same horizontal plane, and the height difference is less than 8 mm When installed side by side, the height difference is less than1mm.
6, all kinds of strong and weak electricity socket interface should not be lacking, power sockets and telephone sockets should be set on both sides of the bed, and more than three power sockets should be set near the computer desk and the background wall of the living room TV cabinet, and corresponding TV, telephone, multimedia, broadband network and other sockets should be set.
7. Audio, television, telephone, multimedia, broadband network and other weak current lines are laid in the same way and requirements as power lines, and their sockets or boxes are installed side by side with power sockets, but strong and weak current lines are not allowed to share a set of tubes.
8. All wires entering the wall are buried with PVC flame-retardant pipes above 16, and the wires occupy less than 40% of the space, and are connected with the box bottom by special interface pieces. & lt> < 40% of the space is connected with the bottom of the box with special interface pieces. & lt& gt
9. When using conduit, a reasonable turning radius should be made when the power supply conduit passes through the ground. Special attention should be paid to the use of underground casing and the tight connection with glue. Before the ground is closed, the PVC pipe sleeve must be protected, and it is not allowed to break and damage; When laying floor tiles, PVC sleeves should be completely covered with cement mortar.
(2) Electrical installation
1, wiring, phase line and zero line colors should be different; The phase line (L) of the same residence should be the same color, the neutral line (N) should be blue, and the protection line (PE) should be yellow-green double-color line.
2. Before threading the catheter, apply PVC glue directly on the head to avoid water ingress. When the power cord passes through the pipe, the wire should be straightened before passing through the pipe, and the pipe joint should not be pulled or pulled in the middle; Don't use too much force when threading the weak thread, so as not to break it.
3. The power branch connector shall be connected in the socket box, switch box and lamp holder box. Each connector should not connect more than two wires, and the wires should have appropriate margins in the box.
4, the audio cable in and out of the wall should be at the bottom of the box. At the joint of multi-core telephone line, the sheath mouth is tightly wrapped with adhesive tape to avoid the telephone line from being damp and crosstalk.
5, TV antenna wiring must adopt shunt device and leave a check port.
6. The power cord must not have a joint in the tube, and the power cord must not be exposed on the ceiling or directly put into the wall to ensure that the power cord can be removed or replaced.
7, wire connection is firm, joint is not subject to tension, bandage tightly, when using screw (nut) connection, wire insulation distance is not more than 3mm, copper wire connection application pressure welding or splicing method, splicing length is not less than 5 laps, bare wire must be wrapped with black tape before, no defects such as insulation damage after inspection and approval.
8. Test the wires, signal wires and telephone lines passing through the pipeline to confirm whether there is short circuit between wires, short circuit to ground and disconnection. , confirmed before buried pipe.
9, single-phase two-hole socket wiring, facing the socket left zero right phase, single-phase three holes, directly above the grounding line, socket grounding laying alone, not to be confused with the working zero line. All single-phase sockets shall be "left zero and right phase, with the top grounded".
10, sockets and switches shall be installed firmly, with no gaps around them. Switches installed in kitchens and bathrooms, indoors and outdoors should be switches with splash boxes.
1 1, 16A air conditioning power supply three hole socket. /kloc-All sockets with protective baffles below 0/500mm shall be installed to prevent children from touching them. The bathroom should be equipped with local equipotential connection terminals, and the socket should be waterproof and splash-proof, away from water sources. The lighting switch should be located outside the door, and the mirror headlights and yuba in the bathroom should be waterproof switches.
12. For the comfort and convenience of life, the bedroom should adopt double control switches, and the kitchen power socket should be set with switch control power in parallel.
13, socket, switch and panel shall be fixed with supporting screws, and wood screws or gypsum board screws shall not be used instead, so as not to damage the bottom box, and the switch shall be installed in the same direction.
14, the distribution box should be connected to supply power according to the different power of indoor electrical equipment; High-power household appliances should be wired independently and installed with sockets. The wires in the distribution box should be arranged neatly, the switches for socket lighting should be distinguished, the crimping fittings should be complete, the rotation direction of the crimping wires should be correct, the wiring of the circuit breaker should be firm, the wires with different wire diameters should not be crimped at the same end of the circuit breaker terminal, the distribution box shunt should be balanced, and each loop should be marked.
15. After completion, submit a standard and detailed circuit layout.
(3), electrical testing
1. After all wiring is completed, the distribution box, socket and switch must be inspected and tested.
2. Weak current needs to be detected by short-circuiting at one end and measuring on-off at the other end.
3. After all the electrifying is completed, conduct electrifying detection. The leakage switch works normally, and the socket switch is tested well.
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