ProjectNumber-PanelNumber Rev Sheet
But Alaric, is your question regarding spaces, dashes and underscores in the drawing names? The damm underscores were required years ago for a lot of database systems; I'm not sure if that's still the case. Personally, I hate underscores; I can live with one or two hyphens; but I'd rather just see spaces to separate fields that make up the identifier.
If I may present an opposing view ? (I work with a lot of legacy systems....like 30 year old legacy systems =)
I'd rather see an underscore than a space - It tells me that there is a charachter there, as opposed to a printer/copier/scanner error (it line-feeded too far...) If there is more than one underscore, it will be easier to notice this - ie- underscores are usually wider than spaces (in a non-fixed width font)
I'd also rather not use a dash - MS word (a fact of life in corporate America) has 2 different dash's (one is a dash, I don't know what the other one is called) but I'd rather that potential for confusion not be there. The same reason we skip "i" or "j" in the alphabet or specially annote "o" vs. "0" (letter o vs. the numeral zero)
Our plant numbering systems just sucks and is horrible, so I'm not gonna give you my current system =)
At my old place, we sold turnkey systems. Panel CP1 was pages 1000 to 1999 (CP2 was 2000 to 2999 etc).
1000 to 1004 - table of contents
1005 to 1049 - 3 phase 480w wiring (highest voltage in panel, incl supply, panel FLA and disconnect size
1050 to 1059 - 120vac control power
1060 to 1899 - remote I/O (first inputs, then outputs...)
1900 to 1999 - VFD parameters, reference procedures, notes, design criteria, network lengths, misc..
We had a system where the 3 phase motors were pages 1005 to 1039
This system was nice once you learned it, but to new customers (all of them) it took some learning. A few times we used up all the pages in an allocated ranges (ie- we had more than 9 120v pages) we just nudged the subsequent pages out for the rest of that panel. not a great solution, but there was a lot of legacy behind that system too (and I no longer work there =)
-John