Sparky,
Here's convoluted.
Voltage drop is not normally enforceable because it is a fine print note.
However, NEC's stated purpose is "the practical safeguarding of persons and property..." 90-1(a).
If excessive voltage drop would cause operating problems in any equipment that is required for safety, then a case could be made for installing larger conductors.
Tom
[This message has been edited by Tom (edited 06-03-2001).]