Shared Coordinates Drift Between Linked Architectural Model and Panel Locations
Your electrical team has modeled 240 receptacles, 80 light fixtures, and 14 panelboards in a Revit model started from an architectural link. The architect later reissues the shell with a 3'-6" building shift and a 2-degree rotation, and your office uses a federated workflow where the electrical model is the published coordination model. After reloading the link, you notice panels in the east wing are now 3'-6" off the architectural rooms, conduit homeruns cross walls, and the panel schedule room names no longer match. A junior modeler suggests selecting all electrical elements and using the Move tool to nudge them back. The project uses Shared Coordinates, and the architect's model has Acquired Coordinates published to a site file.
1. Diagnose why the electrical elements moved relative to the architecture after the link reload, and explain what the junior modeler's Move suggestion would break.
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The electrical model was almost certainly created in Project Internal coordinates and the link was positioned by Acquire Coordinates or by manual positioning, so the reissued link carries new shared-coordinate values. When the link is reloaded, Revit honors the shared coordinate system, not the previous visual placement, so host elements that were placed relative to the old link origin appear displaced relative to the new geometry.
Moving the electrical elements manually would break the shared-coordinate relationship permanently: the host and link would no longer share a common origin, future reissues would drift again, and any exported NWD or IFC for coordination would carry incorrect coordinates. It also silently changes circuit and panel associations only where geometry is rehosted, so some homeruns would appear fixed while others remain wrong.
Correct approach: verify the link's positioning method (Shared Coordinates vs. Project Base Point), compare the host's shared coordinates to the architect's published site file, and if the architect genuinely moved the building, re-acquire coordinates or use Publish Coordinates only after agreeing which model owns the site. If only the link placement is wrong, correct the link's positioning rather than moving host content.
2. Describe the verification steps you would run before and after correcting coordinates to confirm no electrical content was silently rehosted or orphaned.
Read the worked answer
Before correcting, create a workshared backup and a detached copy. Record the current shared coordinates of the host Project Base Point and Survey Point.
Step 1: In a 3D view, isolate the Electrical category and check the link's room bounding. Run an interference check between electrical elements and the architectural link to quantify displacement.
Step 2: Open the panel schedules and export the room name and number columns; this becomes the baseline. After the coordinate correction, re-export and diff the two files. Any panel whose room changed is suspect.
Step 3: Check the System Browser for disconnected or unassigned circuits, and filter the schedule for elements with blank Space or Room parameters.
Step 4: Review warnings for elements no longer hosted or hosted in the wrong level.
Step 5: Republish coordinates to the site file only after the architect confirms ownership, then re-run the interference check to confirm the displacement is zero.