The present disclosure is directed to a cover assembly for a cable tray having a cover and at least one panel. The cover for a cable tray has at least one access opening. The panel aligns with at least one access opening to allow access to the cable tray upon removal of the panel. The panel is selectively secured to the cover using fasteners placed through aligned cover fastener holes and panel fastener holes. The panel has a top edge, a bottom edge, and two side edges. The top edge of the panel comprises an upward facing lip. The bottom edge of the panel includes a tongue that has a first portion and a second portion. The first portion is generally directed in a downward angle, and the second portion is generally directed in an upward angle.