zgorany wrote: the test tube has voltage on the brown and black wires.
"Something" is induced in the unloaded cable,
which runs parallel to the laden.
I would only call it potential, not tension.
You can check it on your own skin.
If the black vein bulbs are lit, touch N to this unloaded brown vein
and the potential will disappear. There will be no short circuits.
YOU HAVE NO IDEA DON'T RISK !!!
The test tube is an electrician's "weak" tool.
Added after 4 [minutes]: zgorany wrote: or is it supposed to be this way?
It will be like that.
Don't stress
OK.