To calculate the size of the cut-out in the cable tray in this situation you divide the distance between sets by the width of the cable tray ie. You have used your protractor and worked out you need to make a 22° angle in a 600mm cable tray. Use this tool to estimate sloped section length, horizontal run requirement, cut marks, and installation feasibility. Oglaend System manufacture and deliver Multidiscipline modular bolted support systems, cable trays, cable ladders and accessories for complete installation and containment of Instrument, Electrical, Telecom, HVAC and Piping. Cable trays are essential for organizing and supporting electrical and communication cables, as well as assuring safe installations. You don't need a PhD—just a consistent method.