Wish I could see a picture of this one. i think you're talking about a back fed breaker? See 408.16(f)

The only other restriction I know of is that the "up" position must be "on". 404.7 & 240.81

Tom

[This message has been edited by Tom (edited 12-08-2001).]

Few things are harder to put up with than the annoyance of a good example.