The problem is this, on occasion, when servicing equiptment you might have reason to test something with power applied. This would not be a normal condition, but would be the exception. I also work as a broadcast engineer and there are hazardous voltages present in areas that need to be accessed for service. Our transmitters have a high voltage of 36KV and 32KV (at about 2 Amps) Under all normal conditions this is well protected from contact, But on an older transmitter that was removed from service there are a whole lot more opportunities to stick an appendage somewhere where one shouldn't. You know there is a possibility for danger when attached to the front of the cabinet is a grounding stick to discharge the large Capacitors and such.
Now a days in broadcasting, the number of staff available to work on stuff is usually yourself. Gone are the days of large staffs and large budgts as this is an industry that has a lot of competition and thus you sometimes have to do things under less than ideal conditions.
Even better would be a webcam on the cage so someone could observe the person working in the hazardous area. Call the security desk and let them know you are enterring the area, and once again when you leave so they know when to keep an eye on things.