The main takeaway is simple: safety issues for cable tray systems are serious, and ignoring them can lead to real problems. But by taking the right steps – planning well, using proper lockout/tagout, wearing the right gear, and making sure everyone is trained – you can reduce. Cable tray systems can pose serious safety risks if not properly designed or installed. - Skilled & experienced technicians and the worker shall be involved in the activity. 305(a)(3), or comparable standards promulgated by States. Cable trays can be part of a planned cable management system to support, route, protect, and provide a pathway for cable systems.