Dimensions for laying the rubber sheet in the distribution box

Rubber sheets used in distribution boxes are primarily specified by thickness according to voltage levels, with typical thicknesses ranging from 3mm to 12mm.Thickness StandardsThe thickness of insulating rubber sheets is crucial for electrical safety and depends on the voltage of the distribution system:Low Voltage Distribution Rooms (below 500V): Rubber sheets with a thickness of 3mm are generally sufficient to provide insulation and protection for personnel .10kV Distribution Rooms: A minimum thickness of 4mm is recommended to ensure adequate insulation against higher voltage .35kV Distribution Rooms: Thicker sheets of 12mm are advised to meet safety standards and prevent electrical hazards . These thicknesses comply with domestic power supply bureau standards and are essential for preventing electrical accidents during operation.Material and PropertiesRubber sheets used in distribution boxes are typically made from butyl rubber, silicone, or natural rubber, offering:High dielectric strength and resistance to leakage currentsTensile strength and elasticity to withstand mechanical stressResistance to heat (up to 100°C), UV, ozone, and agingFire resistance and chemical resistance to acids and lyesHalogen-free and odorless properties for safe indoor use Dimensions and PlacementWhile thickness is standardized, the length and width of the rubber sheet are usually chosen to cover the floor area in front of or inside the distribution box to ensure full insulation. The sheet should be positioned securely to cover the area where personnel may stand or work near live circuits . For portable or site-specific distribution boxes, sheets can be cut or customized to fit the box dimensions, ensuring complete coverage and safety .Safety ConsiderationsInspect sheets regularly for wear, cracks, or damageEnsure the sheet's voltage rating matches the applicationUse in combination with personal protective equipment (PPE) such as insulated gloves and bootsStore sheets in a dry, cool place away from direct sunlight to prevent deterioration By selecting the correct thickness and material, and ensuring proper coverage, rubber sheets provide effective insulation and enhance safety in distribution boxes and rooms.