Busway Design

[bcl]

You definitely need an isometric drawing if you are changing direction or elevations or connecting to other equipment.
For a straight run I would think a simple drawing would suffice, but you need to include things like the tap box location and hanging parameters.

Yes, I included a provision in my bid that accounts for cost increases associated with the final isometric design. My original estimate included tap boxes, elbows, etc., but I didn't want to rely solely on my own interpretation of how things ought to be run.