del prado,
The reason for citing FAA RECAT is that ICAO asked EUROCONTROL and the FAA to re-categorise aircraft and develop new wake turbulence separation standards.
What you are seeing is the EUROCONTROL/FAA RECAT Phase 1 program. IF this is adopted by ICAO, this will be coming to an airport near you.
UpperATC,
Under RECAT 1, there is one separation standard.
There is not a different minimum sep per visual/radar conditions. The only difference in the standard, is as illustrated in the table..IF the runway has the 2.5nm MRS sep, the min RECAT is 2.5...IF they have the standard 3nm MRS, then the min sep is 3nm...
From the FedEx document you reference, the runways they use do not currently have the 2.5nm waiver, so the min wake sep of 3nm is illustrated...
(note 777 to 777)
As you have noted, the RECAT standard for sep is threshold to 10nm. This was moved out from threshold to 5nm (typical FAF) to harmonize with TRACON.