Thickness of National Standard 7258 Distribution Box

The wall thickness of a National Standard 7258 low-voltage distribution box body must be at least 1.5mm, with metal auxiliary rods at a minimum of 1.2mm.Standard RequirementsAccording to national standards, the distribution box body should be made of cold-rolled steel plate or other suitable materials, and the minimum wall thickness of the box body is 1.5mm to ensure structural integrity, electrical safety, and seismic performance. The metal auxiliary rods inside the box must have a minimum thickness of 1.2mm to support internal components and maintain grounding reliability ( ).Material and Safety ConsiderationsMaterial: Steel plates, stainless steel, or aluminum are commonly used, with thicker walls recommended for higher durability, heat resistance, and safety.Seismic and load factors: The thickness ensures the box can safely bear electrical equipment and withstand vibrations or minor seismic events.Environmental protection: The box surface is typically treated for corrosion resistance, making it suitable for outdoor or industrial environments ( ).Practical NotesWhile 1.5mm is the minimum standard, specific applications may require thicker walls depending on the equipment load, environmental conditions, or material type. For example, boxes carrying heavier transformers or exposed to harsh conditions may benefit from increased thickness for enhanced safety and longevity ( ). In summary, a National Standard 7258 distribution box should have a body thickness of at least 1.5mm, with auxiliary rods at 1.2mm, and material and environmental factors should be considered when selecting or manufacturing the box to ensure compliance and operational safety ( ).