1. The materials used in the Non-metallic box must conform to the requirements of GBT 15568-2008 general-purpose sheet Molding plastic (SMC), or the use of better weathering material, the wall thickness of the box must not be less than 5mm.
2. The metal box must use the grade q235-a or better metal material, the thickness is not less than 1.2mm.
3. Non-metallic components must use flame-retardant ABS plastic or better plastic materials.
4. The Fiber wiring box composition material must conform to the SJ, T 11363-2006 stipulation uniform material (EIP-A Class) The poisonous harmful substance content request.