The assembly position of the distribution box should avoid direct sunlight, splashing water, and moisture, and there should be ample operating space at the rear. Regularly stop cleaning the equipment inside the cabinet, reflect on the wiring terminals, whether the switches and contactors are superior, whether there are signs of overheating outside, and regularly reflect on the sealing function of the distribution cabinet to avoid small plants from entering or external condensation. To deal with areas with high humidity, it is necessary to equip with dehumidifiers, dryers, etc. We should reflect on whether the assembly position is sturdy and not deviate or sway.
1. Equipment request: 1) The surface reflection of the cabinet (panel) body should be free of damage and deformation, and the paint should be intact and undamaged. Reflection on the exterior of the cabinet (panel): The electrical assembly, components, and insulation porcelain parts are complete, without any defects such as damage or cracks. 2) Before assembly, it is necessary to check whether the distribution box number matches the assembly position, and reflect on its box number and circuit number according to the planned drawings. The grounding of the box door should adopt soft copper braided wire and common wiring terminals. The wiring inside the box should be standardized, in accordance with the requirements and acceptance standards specified in the plan (GB50303-2002).
2. Prerequisite for homework: The civil engineering of the distribution box assembly site should have the fundamental prerequisite of achieving internal painting and installing doors and windows. Pre embedded pipelines and components should be properly cleared; The garden has transportation prerequisites and insists on a flat and smooth route.
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3. Distribution box positioning: Based on the plan request, confirm the status of the distribution box on site and the actual equipment assembly environment, and stop wire positioning according to the shape and size of the box.
4. Foundation steel assembly: 1) Prefabricate and process the foundation steel frame according to the drawing requirements, and do a good job of anti-corrosion treatment. Place the prefabricated foundation steel frame on the reserved iron parts according to the position marked on the construction drawing, level and align it, and then weld the foundation steel frame, embedded iron parts, and gaskets firmly with electric welding. The top of the ultimate foundation steel should exceed 10mm above the leveled height. 2) Grounding of foundation steel: After the assembly of foundation steel is completed, the grounding wire should be welded firmly to both ends of the foundation steel, with the welding surface being twice the width of the flat steel, and then connected firmly to the cabinet grounding bar. And carry out anti-corrosion treatment.
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