This upper busbar chamber is a power distribution accessory designed to be mounted on PanelSet SFN floor enclosures made of decarbonized steel. It contains recycled steel produced with renewable energy, leading to a significant reduction in CO2 emissions. It has nominal dimensions of 300 mm in height, 1200 mm in width, and 800 mm in depth. The frame and supports of the chamber are made of galvanized steel to ensure a long service life. The panels are made of sheet steel. An epoxy-polyester powder coating provides a smooth appearance. The chamber is finished in gray (RAL 7035) with a black (RAL 9005) handle. It comes with a seal, front and back panels, and four eye screws. The chamber has an IP55 protection rating, meaning it is resistant to the ingress of dust, water, and oil. The enclosure is also impact-resistant and has an IK10 rating. Operation is comfortable with access from the back, front, and sides.