Splice plates are the most widely used method for connecting cable tray sections in straight runs. Splice plates are flat metal pieces with holes. Fittings can, on the one hand, be used for horizontal or vertical changing of the routing direction or, on the other, to change the height or width of the. There are five common ways to fix the cover plate of cable tray elbow supplier: pressing plate fixing, screwing fastening, clasping fixing, padlock fixing and seven-shaped buckle fixing. The main contents. This publication is intended as a practical guide for the proper and safe* installation of cable ladder systems, cable tray systems, channel support systems and associated supports.