Copper bars for 60mm busbar kits, EBM 32/70mm and N/PE, . Field width +40mm, suitable for busbar supports FST601N, FST603N, FST703N. Width 2. Height 2. Rated current (A) 355 (285) . Copper size L1 - 3 12 x 10mm. PU 1. Copper bars. Pre-assembled copper bars in the sizes . 12 x 5, 20 x 5, 30 x 5, 12 x 10, 20 x 10, 30 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). Shortened field width. Vertical design in field height.