said by sk1939:Anything wrong electrically/code-wise about my plans? Someone told me that you can't use flex for more than 6 feet...
Since your location says New York, NY - I would assume this is in NYC? You should check the NYC codes; especially under type-FMC uses permitted & prohibited. Not sure about the flexible conduit length (simply because I never had need to look it up, as I would never do such a thing. Hideous, IMHO.) Also, if you're running it over a ceiling; not sure how you plan to secure & support it properly at the code required lengths. Its usually a lot easier to run type-MC or conduit over drop ceilings.
For another thing, you say the run is 100 feet long. Better consider using 10 AWG, or at least think about doing a voltage drop calculation. 3% is the maximum voltage drop allowed on branch circuits, as per the NYC electric code, for most types of buildings.
As for placing a 15A fused disconnect on the circuit; then, the way I see it, makes the upstream portion a feeder. I would bet there's an NEC requirement against placing receptacles on a feeder. (Again, something I have never looked up, as its something I would never do.) Sorry, sk1939, but in my opinion the whole thing sounds like what started as a mess, is only becoming worse.