National Electrical Code Section392. 8(B) states that in other than horizontal cable tray runs, the cables shall be fastened securely to transverse members of the cable trays. The cable's weight. As you can see from the image illustrated below 👇 I have a set of cable tray run in my model which I need to change their rotation by 180 degrees. Also, is it possible to place a new cable trays inverted in such a way that the bottom of the cable tray is upside? I welcome any ideas or suggestions. en completely installed, without damage either to conductors or structural system use maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. These rules shall be applied in the cabling engineering workflow for all subjects concerning or in relationship with cabling in the ITER facility. Adherence to these guidelines is essential: 1. Proper installation can significantly reduce electromagnetic interference, prevent fire hazards, and improve overall efficiency.