The welding and bolt connection of the distribution box shall be firm, and the weld joint shall be uniform, bright and clean, free of defects such as welding skin, weld through, air hole, etc. The distribution box has the characteristics of small size, simple installation, special technical performance, fixed location, unique configuration function, not limited by the site, relatively common application, stable and reliable operation, high space utilization, less land occupation and. 4 KV Substation of the ratings indicated above. 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. Sealing performance: It directly determines the protection level Outdoor distribution boxes typically require ingress protection (IP) ratings of IP54, IP65, or higher to ensure adequate environmental resistance. Achieving reliable waterproofing necessitates continuous, uninterrupted welding along. Electrical enclosure welding means joining metal parts like panels and frames to build a strong box that protects electrical equipment. It keeps out dust, water, and damage, making sure the system runs safely and lasts longer. To extinguish the arc immediately in iso ators, in each phase arc-chutes with minimum 12 strips ype.