IMHO, think about this:
The "line" side of a fused disconnect is connected to the bottom lugs.....you "open" the disco to replace a fuse....the fuse is "hot", and so are the knives that you opened.....
How many of us have come upon this scenario??
Just put a untrained person, DIY'er, homwowner, or the new apprentice in the above situation!
How about the guys that "back feed" a 2 or 3 pole CB???
Manufacturers instructions are supposed to be followed. Somewhere there is/was a reference about the disconnect switch isolating the fuses when the switch was "open".
John
