First very few firefighers are qualified to cut energized serivce conductors, and then most likely don't have the correct PPE to do it safely. Second, it might not be very wise to cut the power at the pole because it could be feeding the building fire pump. Third, the building "pre-plan" that should be done by the fire department for commerical and industrial building will show the locations of all of the building utility service disconnects. 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.
Don
