More about Routing along External Curves

There are a few things that you need to know about routing along external curves.

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About Routing
Routing along External Curves

Valid external curves are curves of the following types: splines, lines, helix, spirals, splits, joins, projections, intersections, corners and connect curves.


  • Branch geometry is created using the selected curve as center curve.
  • You can add branch points anywhere along the curve.
  • Only Diameter and Section parameters are available. Since the branch center curve is a predefined curve, Bend radius and Build mode parameters are no longer pertinent and are therefore unavailable.
  • Route Definition is unavailable: you cannot modify external curve route. To modify the branch shape, you must edit the external curve itself.
  • Since the branch is built on an external curve, you cannot add definition points, vectors, or devices to the spine definition.
  • One branch is created for each external curve. You cannot select more than one external curve at a time for each branch, but you can use joins and other types of curves to combine several curves.
  • Electrical connections are automatically created if the ends of the external curve correspond to the ends of the branch. They are only created in the Branch Definition command. If the ends of the external curve are modified, no electrical connection update is done.
  • The branch length is the length of the external curve.