So a while ago i got my hands on a old sewing machine sadly the foot pedal blew up on me and i also noticed that the machine made my fingers tingle (more on that in this old post here: https://sh.itjust.works/post/35395330 ).
After that i didnt touch the thing for a while but now i needed to sew something so i got myself a new motor and pedal for it online.
The motor fits neat to the machine and the pedal works. But after the last time i was a bit afraid to just touch it, decided to better do a voltage check first.
So i grabbed a Multi meter and connected one side to main earth, and the other side to the metal body of the machine.
And apparently there are 30-32V AC on the metal body of the machine :( Then i tested the current and it was 4.1uA.
I did the same thing for the motor spindle an and the results where even worse >.< 173V AC on the spindle and 43uA when i short it to main earth over the multi meter.
Now my question is:
Is this normal?
Is it maybe just some parasitic currents from the Motor windings acting as antenna and inducting voltage into the metal body of the machine?
Will it kill me if i touch it?
Should i ground the machine to earth using a second plug?
Should i isolate the motor from the metal machine body?
Here are some more pictures from my measurements and measurement setup:
I could change it, i dont think there is any law against it as long as i am the only person using the machine, my problem is more practical. Even if i change the plug i would have to bypass the foot pedal, hence ending up with 2 wires in parallel basically the same as with the 2 plug solution.