Edit the first rung reference number to resequence a ladder.
AutoCAD Electrical toolset drawings can be easily renumbered and retagged with a minimum of manual clean-up. You can resequence line reference numbers, component tags, and wire numbers. It is useful when a drawing has been copied from a previous project and the line reference numbers and tagging format of the drawing do not conform to the project requirements.
Resequence ladder line reference numbers
The Modify Line Reference Numbers dialog box displays a list of ladders in the drawing.
The reference numbers update along each ladder.