In the Electrical workspace, click Manage tabPreferences panelCable Tray . In the Cable Tray Layout Preferences dialog box on the Routing tab, under Cable Tray Layout Rise/Run, click Angle or Fraction. For Rise/Run, enter the desired value, depending on the. 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 industrial applications. Use this tool to estimate sloped section length, horizontal run requirement, cut marks, and installation feasibility. The Ladder Tray features light, rugged, tubular steel construction. NEC Article 392 limits fill ratios based on cable type and arrangement — single-layer or stacked — to ensure adequate ventilation, maintain current-carrying capacity, and provide space.
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