Which standard should be used for the thickness of distribution boxes

The minimum steel plate thickness for distribution boxes is generally 1.5mm, with switch boxes requiring at least 1.2mm, according to national standards and JGJ46-2005.National and Technical StandardsAccording to JGJ46-2005, distribution boxes and switch boxes should be made of cold-rolled steel plates or flame-retardant insulating materials. The steel plate thickness requirements are:Switch boxes: minimum 1.2mmDistribution boxes: minimum 1.5mm The surface of the boxes should also be treated for anti-corrosion protection to ensure durability and safety . Other technical specifications reinforce these requirements:Distribution box enclosures: not less than 1.5mmPower distribution cabinet bodies: cold-rolled steel plate, not less than 2.0mmDoors and panels: minimum 2.0mmBack panels: minimum 3.0mm These specifications ensure mechanical strength, proper mounting, and seismic resistance .Material and Application ConsiderationsThe required thickness may vary depending on:Material type: steel, stainless steel, aluminum, or plasticSeismic resistance: thicker walls improve earthquake durabilityTemperature and environmental conditions: materials respond differently to heat and coldEquipment carried: boxes with heavier or more complex electrical components may require thicker walls .SummaryFor standard low-voltage distribution boxes, a minimum wall thickness of 1.5mm is generally accepted under national regulations. Switch boxes require at least 1.2mm. For larger power distribution cabinets or enclosures carrying heavier equipment, thicknesses of 2.0mm or more for panels and doors, and 3.0mm for back panels, are recommended to meet mechanical and safety standards . Proper material selection and anti-corrosion treatment are also essential for compliance and long-term reliability.