---"This makes it easy to use the normal building disconnect to kill the power in the building, while waiting for the utility to kill the service drop."---
The problem I see with this is that the fire may very well prohibit the firemen from getting to the disconnect without having to spray large amounts of water on the energized switchgear, bussrails, etc.
The main building disconnect could very well be the source of the fire and I wouldn't want to be the one to have to spray water on an energized 5000 amp main.
I simple little shunt trip could solve some of the problems here but still wouldn't kill the power on the line side of the main.
I think that for once in Fl.'s life, they actually had it right.
An external means for disconnect sounds like a good idea to me.
