Wire numbers are blocks or attributes inserted on a line wire entity. AutoCADÂ® Electrical assigns each wire number type to its own layer. You can assign a different color to each of these layers so you can easily tell them apart. The wire number placement is set to in-line as defined on the Drawing Properties Wire Numbers dialog box.
Insert wire numbers
Wire Tag Mode:Sequential
The wire numbers are automatically inserted into the drawing starting with number 100.
Specify new Wire Number location (select on wire):
Select each wire closest to Black Box 1, right-click
Note: You can align the wire numbers using the Align tool.