Conduit, Cable Tray, and Raceway Modeling
Understand the routing tools
Revit provides conduit, conduit fittings, cable tray, and cable tray fittings. Know that these are separate categories with their own routing preferences, and that parallel conduits and cable tray use different placement tools. A common trap is mixing conduit and cable tray families, which will not connect or route together.
Routing preferences and slope
Routing preferences control size, fitting type, and bend radius. Understand how slope is applied to cable tray and conduit runs, and how vertical vs. horizontal segments are created. Another trap: conduit without a fitting at a bend may not connect, and runs may not calculate length correctly.
Systems and connections
Conduit and cable tray can carry electrical systems when configured with connectors. Know that cable tray and conduit can host wires and that the system browser tracks them. Understand size and fill concepts, and that Revit does not automatically enforce fill percentages unless you model and check them.
Rule of thumb
Model conduit and cable tray on dedicated worksets with consistent routing preferences, and always place fittings at direction changes to keep runs connected and schedulable.
Worked example
A conduit run shows a gap at a 90-degree bend. The bend lacks a fitting; placing an elbow fitting from the correct routing preference reconnects the run and restores length calculations.