No! Never use a normal vacuum cleaner to suck up dust that might contain ACMs! It will not filter all of it out of the airstream so will spread it around the room, and may continue to do even after you've changed the bag and moved on to another job. Work wet, damp the dust, contain it at source etc.
DMX is also in Aus. Do we have a verdict about UK meter boxes? In the UK we didn't really have meter boxes until after the asbestos era. As above. the traditional white ones have always been GRP.
HHD did you have a pic of the suspect box or one like it?