60 Amp, 3 phase, 208 volt power receptacles provided to supply motor-generator sets for helicopter 'shore power'. The MG sets have built-in switches/controllers. Laziness prevails and the users plug and unplug the MG sets in the 'on' position so that the attachment plug and receptacle are being used as the disconnect and controller. Owners won't change unless there is a code or legal requirement for a switch upstream from the receptacle (which is still going to be a problem in my mind because it requires a separate manual operation which isn't being done now as it is).
Assuming the receptacle is correctly sized and the branch circuit correctly protected, does anyone know of a requirement that would call for a manual disconnect ahead of the receptacle?
