Since the crew taking these photos are wearing hazmat suits, it would seem that the red "caution" tape around the recessed cable trays would seem to be redundant.
See here for a view from the other side of this room.
|Time picture taken||Wed Mar 18 09:10:16 2009|
|Location picture taken||F-1 Test Stand Interior
West Test Area
Marshall Space Flight Center
|Photo Credit||Marshall Space Flight Center|
|Full-size Image||Click here for a 1029x684 pixel version of this diagram in a new window.|