Power line - through or drilled

I have a problem once testing jobs  and hope that it turns out to be not too bad...
Actually I was planning to install a shelf in the kitchen. Unfortunately, it has at the drill a small bang incl. Flash given and flew out the fuse. I so cleansed again the fuse to the fuse box, and the borehole into the phase tester to verify if current is flowing or not. Was probably not a good idea and can end may perhaps also badly! The phase Tester was to again blast, Flash, fuse out, etc black and somewhat smaller than before
So, I assume that the on or drilled through line is a power line?
Now also the (possibly stupid) question whether I strongly a electrician for repair should call or whether it is enough to to filling the hole would be nothing again.
I hope to get the one or two useful answer here.
If I am wrong in this thread, please move.
Call specialist and management rep. Everything else is bungling and dangerous
The voltage Tester is not short-circuit proof, therefore the looks, how he looks now.
Most are so cheap material to bend if you a wants to go to screw so eh.
Call professional, backup let out that long (fire hazard).
He was talking about a phase tester. The devices are not suitable. A voltage test is up to 1000 Volts pin 2.
I know what he meant, thats just the vernacular which sneaking up there, because with the phase Tester you can test Yes if a voltage is applied, if you necessarily want to do this with such a thing
D' around this thing well ever voltage Tester is called.
With a screwdriver, considering also no screws
That is also a screwdriver
Perhaps regional differences
We have also net here but Gliedermaßstab(Grad)metrisch ruler (with winkelfkt.)
How about a suitable detector?