Solid Bottom Trough Cable Tray with Custom Dimensions | Anti-Corrosion Closed Cable Trough for Shielded Electrical and Telecom Wiring Product Overview Electrical and communication engineering requires dependable cable shielding to sustain continuous system operation. Our solid base trough cable tray adopts non-ventilated solid bottom design, which distinguishes it from perforated ventilated cable trays. Matching detachable covers can be installed to form an enclosed channel,