Busbar connection kit, 1-pole, 185mm busbar system, cabinet-cabinet. (Horizontal N-housing). 800 A, for 40 x 10mm Cu. Rated current (A) 800 (715). PU 1. Copper bars. For 185mm busbar kits. Pre-assembled copper bars in the sizes 30 x 10, 40 x 10, 50 x 10, 60 x 10mm in the following variants:. Horizontal design: - Field width. - Extended on one side (perforated from 20/30mm copper). - Extended on both sides (perforated from 20/30mm copper).