Heads-up from Ideate Solutions, originally from Revit Clinic:
tagging the physical wires instead of tagging the device:

  1. draw wires coming off of each connector as small as possible
  2. (if the wire is short enough, the arrow head will not show up.) You can then
  3. hide the dot/short line of the wire in the symbology of the family and
  4. tag it.


via
Ideate Solutions: Revit MEP FAQ - Tagging Families That Have Multiple Connectors


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