You can specify vertical or 45-degree lines and the line spacing to use. In the Electrical workspace, click Manage tabPreferences panelCable Tray . To specify a cable tray pattern, under Cable Tray Pattern, select a type of line pattern, and enter a value for. The B-Line series Cable Tray Manual was produced by our technical staff. We recognize the need for a complete cable tray reference source for electrical engineers and designers. The following pages address the 2014 National Electrical Code® requirements for cable tray systems as well as design. In this video, we'll cover the essential steps of marking and cutting cable trays. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. How to design cable tray? Most projects are roughly defined at the start of cable tray design. For projects that are not 100 percent defined before design start, the cost of and time used in coping with continuous changes during the engineering and drafting design phases will be substantially less. You can specify labels or flow arrows to be added to cable tray runs as you draw them. Wire Basket Overhead Cable Tray Routing System contributes to effective space utilization.