There are basically two types of house power panels
My Progressive Dynamics has handy dandy LED's next to the fuses Blow a fuse and the LED lights up....
OThers do not
If yours does not you need an automotive test lamp and may need so wire to extend the clip lead with to any good ground.. or not depending on the panel)
Touch the tip into the small square or retangular opening on each end of the top of the blade..
BRIGHT-BRIGHT = Good fuse
BRIGHT-DARK (or Dark bright) Bad fuse
Dark-Dark no test.