Joe It's just a personal thing with me I don't usually leave slack.
The company I work for is a stickler for color coding so shifting circuits can be problematic particularly when I usually run multiwire branch circuits.
Moving circuits also messes up the J-box labeling we do.
That aside I will be surprised if you can provide any good reason to place larger loads near the lug other than personal preference.
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The difference of a few inches of busbar seems insignificant.
[This message has been edited by iwire (edited 01-03-2006).]