This Top Bus Chamber is a power distribution accessory to be assembled on top of the PanelSeT SFN floor standing modular decarbonized steel electrical enclosure. It contains recycled steel, which is produced with renewable energy, resulting into a significant reduction of CO2 emissions. It has a nominal height, width, and depth of 300 mm, 1200 mm and 600 mm, respectively. The frame and uprights of the chamber are made of galvanized steel for durability. The panels are made of steel sheet. An epoxy-polyester powder finish provides a smooth appearance. The chamber has a grey (RAL 7035) color with a black (RAL 9005) handle. It comes with one sealing gasket, front and back panels and four eyebolts. The chamber has an IP55 rating, which makes it resistant to dust, water and oil ingress. The enclosure is also resistant to impacts, with an IK10 rating. Operation is convenient due to rear, front, and side access.