Maybe "they" are trying to alert the installer that if used for living quarters, that ' Floor outlets ' may be required.
You mentioned ' window ' , so I guess it is not totally metal and thus the porch can be protected from driving rain.
Not good architectial design to have those extention cords under carpets or around the perimeter of the porch for todays electrical items. But usually 'too' late to install floor boxes in concrete after the permit is obtained.
[This message has been edited by Glenn (edited 11-18-2001).]
