rumrunner

Switch off every thing you can find giz,test it ,make sure everythings dead ,test between phases ,phase to earth and phase to neutral,this thing may have more than one supply.
and be confident reading manuals will just confuse you ,read the previous posts ,and go and get the job done ,you cant woory about every job you might do in the future,
all the best with it.

It Cant Hurt You If Its Dead.