With the continuous need of science and technology, building electrical equipment is constantly updated, and its installation technology requirements are also increasing. However, in the installation process of electrical equipment, there are often many problems. The following section briefly discusses the installation technology of building electrical equipment.
First, do a good job in the coordination of electrical equipment before construction and installation. Due to the large number of professional construction teams in construction and the wide cross-operations, each construction team only pays attention to the progress of this type of work within the scope of the contract, and does not pay attention to the differences between different professions. Coordination, which often causes difficulties in the installation of electromechanical equipment. Therefore, coordination work should be done well before the construction, which mainly includes the following points: (1) Handing over the handover procedures in due course. After each process is completed and self-tested, the handover procedure shall be completed in time to allow the next process to be constructed as soon as possible to ensure that the construction period and construction conditions are met; (2) On-site supervision shall be performed. In the process of threading, the problem of leakage of the tube box often occurs, causing troubles to the installation and construction of the following equipment. Therefore, the on-site engineering personnel should require the professional construction party to find out the missing issues at one time, and make timely repairs to prevent later rework. Bring more trouble; (3) distinguish the professional construction interface. Some projects do not clearly distinguish the boundary between strong and weak electricity and electromechanical installations in the construction design drawings, causing conflicts between different devices, such as the distribution box equipotential trunk and fire box, and the air conditioner control Cabinet to the power box. The pipelines, etc., conflict with each other and affect the construction. Therefore, the construction party should do a good job of reviewing the drawings, identify the problems in time, and reflect them to the design unit to allow them to modify or change them; (4) to be meticulous in running and staggered construction. The inter-professional construction should be coordinated and arranged as early as possible. For example, when the construction needs to use the building stringers as lightning deflectors, the on-site construction personnel should require the structural construction personnel to promptly notify the electromechanical connection to the lightning protection line when the column bars are cut off. In this way, it is necessary to strengthen the running-in of various majors and do inter-professional construction in order to best ensure the construction quality and progress of the installation of electrical equipment.
Second, the electrical equipment construction and installation phase to do a good job with the civil construction 1, the basic construction phase. During the construction of basic projects, electrical equipment installation engineering personnel shall cooperate with the civil construction personnel to make reservations for strong and weak professional cable entry through the wall, and check whether the reserved location, size, axis, elevation, quantity, etc. are consistent with the drawings. , because if the incoming cable through the wall tube and reserved for pre-buried and failed to rework, it will not be conducive to secondary waterproofing of civil works, so in principle, no rework is allowed. In addition, electrical specialties must be completed before the construction of the waterproofing of the wall to prevent the electrical construction of the later period from affecting the quality of the waterproof layer. Electrical engineering personnel should cooperate with the construction progress of the civil construction, do a good job in time for the reserved construction with holes smaller than 300mm, which are not indicated on the civil construction drawings, and do a good job in the construction of the pipeline static box that is concealed in the floor and the foundation cushion. According to the requirements of the drawings, the grounding measures in the base rocker should be well done. To use the ground anchors as the grounding device, the main bars in the column should be scattered at the base root and welded to the bottom ribs to mark the color, and the trunk line for measuring the ground resistance should be left and tested. point.
2, the structure of the construction phase. The key to the construction phase of the building structure is to make the concealed work of the electric pipe layer by layer. When the concrete is poured into the earth, the electrical profession should be guarded to prevent the lamp box from shifting or destroying the pipe when the concrete is shaken. The pre-positioned holes and pre-embedded iron and wooden box boxes of the electrical professional itself are responsible for the cooperation of the civil engineering construction with the electrical engineering personnel, so that they can be timely buried in place, and the lightning protection of each floor can be promptly completed. Offline welding work. If it is necessary to make use of the main bars of the column as the lightning deflector, the welding joints for the tie bars of the main bars of each column shall be welded according to the process requirements.
3, decoration stage. Before the civil engineering building masonry partition wall, the electrical personnel should verify the horizontal line and the partition wall line to ensure that the position of the top buried pipeline is mixed with various switch sockets, and the position and elevation of the luminaire are correct. Before the plastering of the wall, the electric construction worker shall verify the horizontal line and the wall line that pop up on the inner wall according to the design and specification requirements, and stabilize the box, then sweep the pipe, put on the band, and plug the box. . Plastering at the box should be smooth and smooth. Do a good job of the grounding connection of the anti-hazard voltage equalization line with the glass curtain wall aluminum frame and metal doors and windows. When taking over and stabilizing the box in the partition wall board and the heat insulation board, it is necessary to ensure that the groove is accurately dimensioned and the horizontal long distance notch is not opened as far as possible. Wait for the spray gun or paint brush to install the lighting fixture and prevent the installation from scratching or soiling the wall surface.
Third, the technical requirements of electrical equipment construction and installation 1, should first install the electrical equipment on the insulating electrical installation board, and then put into the distribution box as a whole, according to the relevant process requirements to reasonably set electrical equipment, equipment and board At a distance of four weeks, the connection shall be firm, not skewed and loose, and the distribution box shall be electrically connected to the metal plate.
2. The working neutral wire in the distribution box and switch box shall be connected through the terminal board, and it shall also be divided into the terminal board with protection neutral wire. Insulated wire is used as the connecting wire in the box. The type and cross section of the wire must meet the requirements. An insulated copper core wire with a cross section of not less than 2.5 mm2 should be used to connect various instruments. There should be no exposed live parts, and the wire connector should be firm.
3, the following parts must be done to protect the zero: a variety of metal structure of the box, metal box, uncharged metal base of the box, shell, etc., and the protection of the zero line through the terminal board connection.
4, the wire should not be damaged at the line of the core of the long-line, multi-strand wire to be installed on the pressure line terminal, try not to crimp the coil, the wire pressure head should be solid and reliable. If it is necessary to crimp with the top wire, the multi-strand wire should be brushed and then crimped. The number of wire strands must not be reduced. The cables behind the distribution box need to be arranged neatly, bundled and fixed after being bundled, and the lead wire drawn out of the tray should be left with an appropriate margin for overhaul.
5. Construction in progress shall not be conducted under the high and low voltage lines, and no components, racks, materials and other debris shall be stacked under the high and low voltage lines.
6. Appropriate operating distances shall be maintained between the outside edges of various racks and the edges of the external overhead lines. The voltage of the external lines shall be 1 kV or less and the full operating distance shall be 4m, 6m and 8m respectively. Any of the rotating jib cranes The minimum horizontal distance between the part or hanging object and the overhead line edge should be greater than 2m to prevent damage to the wire line.
7. When the external overhead line of the construction site intersects with the motor vehicle lane, the minimum vertical distance between the lowest point of the overhead line and the road surface is 6m and 7m, respectively, when the voltage of the external power line is 1kV or less and l35kV; for the minimum safety distance, the minimum requirements cannot be met. Measures such as the addition of barriers, fences, or protection nets may be taken at the construction site, and warning signs may be hung. Some construction sites can neither meet the minimum safety distance nor take protective measures, and they should consult with relevant departments for power outage or relocation. Wires, otherwise no construction.
8. Every month, professional electricians should be arranged to check and repair all distribution boxes and switch boxes on the construction site at least once. During inspection and maintenance, the corresponding power switch at the previous level should be disconnected from the power supply, and it must not be energized.
In short, our electrical engineering personnel must pay attention to the installation quality of electrical equipment. According to the characteristics of the electrical engineering of the building, coordination with other specialties should be well done. Installation and construction must be strictly performed in accordance with installation specifications and design requirements to ensure that users can use electricity normally and safely. .
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