Installation kit, universal, with top hat rails, for field distributor AP 4-row, 600x250mm, QC. Installation field for surface-mounted small installation distributors in accordance with DIN EN 61439-1/-3 (VDE 0660-600-1/-3), in accordance with dimensional standard DIN 43 871, for installing devices up to 125 A, support rails made of profiled and galvanized sheet steel, device support rails made of galvanized sheet steel, with contact protection cover.