Nate Holt's Blog

September 29, 2010

Insert Circuit – Dynamically pairing of unique wire Source/Dest codes – AutoCAD Electrical

Filed under: Electrical — nateholt @ 2:11 pm

AutoCAD Electrical’s “Insert Circuit” command is powerful with auto-tagging and such… but if the inserted circuit is popped in multiple times and it carries source/destination wire connection arrow pairs, then you need to edit these codes each time to keep them unique.

Here’s an AcadE “add-on” tool distributed by Doug McAlexander that make AcadE do this automatically. The normal AutoCAD Electrical dialog pops up, as shown below… just make sure that the toggle is set as shown. Then the tool seems to do the rest… doing a project-wide check on Source/Dest codes in use and picking a next available pair for the newly inserted circuit.

Here is link to demo video of the add-in in action. Doug’s site is here.



  1. Nate:
    Do you know if this will work with PLC to I/O routine? That routine does the same thing. It repeats the pairing code for each sheet it creates that has source/destination symbols.


    Comment by Scott Gensemer — October 14, 2010 @ 9:12 am

    • Hi Scott,
      Looking at the wdio.lsp utility source code (which everyone has because this utility runs straight from its source code), looks like the pairing is just “HOT_” and “NEUTRAL_” codes with an incrementing number starting at “1”. So it probably works fine but is not doing any project-wide checks to confirm that each new signal code pair is unique, that it hasn’t been used elsewhere in the project. And this could happen if you run the wdio.lsp utility a couple times to create subsets of I/O schematics for a common project…
      – Nate.

      Comment by nateholt — October 17, 2010 @ 9:14 pm

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