Reasonable setting of cable tray expansion joints is a key link to ensure the safe operation of the cable tray system, and factors such as thermal expansion compensation, vibration absorption and structural stability must be considered comprehensively. The following is an analysis of the setting. Is your cable tray system optimized for safety, dependability, space and cost savings? Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and. 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. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when. It is important that cable tray installations incorporate features which provide adequate compensation for their thermal contraction and expansion.
