Distribution box adopts stainless steel box (stainless steel material is Baosteel 304 or above), the color is stainless steel color, the thickness of the box is not less than 4. Safety-related requirement: Level of interior fire protection, fire resistance duration of at least 30/90 min. These Distribution Cabinets are to be outdoor type nd to be fabricated out of 2 mm GI sheet steel. The body of the boxes shall have sufficient re- enforcement with suitable size of channels keeping a provision for fixin andle conforming to general. ems Distribution piping values Distribution systems. See also Design–flow criteria appurtenances design of evaluations of looping methods of distribution ratings of reliability application of considerations determining level of major system components operations overview sizing of storage depletion. There can be no compromises in fire protection. As an OBO customer, you can rely on test-ed quality. Our fire protection experts subject every newly developed product to. The key material requirements for distribution box are used in constructing an electrical distribution box play a crucial role in its durability, safety, and overall performance.