Possible problems with the distribution box and weak box installation
In front of us, we introduced the precautions for installing the distribution box and how to properly mount it. Today, we’ll go over some common issues that may arise during the installation process and how to address them effectively.
1. **Incorrect or improper selection based on the drawings** – This is a frequent mistake where the wrong type or size of distribution box is chosen, leading to installation difficulties and potential safety hazards.
2. **Thin metal casing with poor rigidity** – Some boxes are made with thin steel, which can cause the outer shell to deform, resulting in misalignment and large gaps when closing the door. This not only affects aesthetics but also compromises protection.
3. **Electrical devices installed do not meet design requirements** – Sometimes, the components inside the box are not compatible with the project specifications, which can lead to malfunction or even electrical faults.
4. **Lack of grounding or insufficiently sized busbars** – Without proper grounding or with undersized busbars, the system cannot safely handle fault currents, increasing the risk of electrical shocks or equipment damage.
5. **Missing isolation or protective measures** – Some distribution boxes lack necessary isolation switches or protective panels. In addition, some panels are not insulated or made from flame-retardant materials, which poses a fire hazard.
To avoid these issues, here are some recommended solutions:
1. **Strictly follow the design drawings and standards** – Before installation, check the appearance of the product, ensure it has a factory certificate, verify the nameplate details, confirm all accessories are present, and inspect insulating parts for cracks or defects. Make sure the electrical appliances inside the box match the design specifications.
2. **Ensure the metal box meets thickness requirements** – The material should be thick enough to maintain structural integrity and prevent deformation.
3. **Properly install grounding and neutral busbars** – The grounding terminal board must be connected to the box body, while the working neutral terminal should be insulated from the box (except for the main distribution box). The busbar should be made of copper and have a cross-section at least twice the largest wire in the box, with a minimum of 60mm² and a thickness of no less than 3mm.
By following these guidelines, you can significantly reduce the risk of problems during the installation and operation of the distribution box. Always prioritize quality and compliance to ensure safety and long-term performance.
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