I guess the best way to indicate the "beginning" point of a Conduit run, would be to attach an Arrowhead leader to the Line, and indicate that point as the "Home Run" point.
Next to the Line, indicate the Circuit's data:
Number of Conductors,
Size of conductors,
To: Panel H1 Circuits: 2,4,6 4 # 6, 1 # 10 1-½" C. Apx. 85'-0"
The text could be contained in a "Baloon" , with a leader line connecting to the Circuit - which would help in cases where many Home Run points are shown together.
You could also database the Circuitry information, attach that database to a certain place of the planset, then use callouts (number and letter) which would correspond to the referenced database information. That makes for a really clean planset!
Other callouts may be used to reference specific Circuitry notes, or to match lines on other plan pages.
For ends of runs, either end it at an outlet, or "Terminate" the run with a solid filled dot. Maybe include something like "EOR" or similar text to verify the dot is indicating end of run (not mistaken for some type of symbol / block).
I like your ideas here! Wish you the best of luck with this.
Scott " 35 " Thompson Just Say NO To Green Eggs And Ham!
I use them for EVERYTHING! Commercial residential, controls. I make a clean copy of prints for the office, and my "Scratch set" is used to lay out my guys, and than can be sent back to the EE for As-built's, and he cleans them up in his format. Or, I copy them again, (if they are still intact)and leave it in the panel room.
Mark Heller "Well - I oughta....." -Jackie Gleason
At Loes'd Santee, they used a simple code for the underground wiring for the parking lot lights. Each run would have a round circle with a number like 38 or 68 in it next to it. "38" would translate to TWO #8 plus #8 ground. This is commercially sensitive information so don't tell anybody about it. Each fixture is labled with its ckt. number. The size of conduit is somewhat optional. Homeend of the runs shows the traditional stupid arrow with the relevant panel number. ~Peter