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Is this kind of voltage supposed to be there?

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objekt406:
Hi,
a few days ago i got shocked by touching the pins on the mains cable going to my lab psu, while moving it. Now im curious if this is a major fail or if its normal to have this high a voltage on the input to the psu. I tested with a PC psu and it didnt even measure above 2V.

objekt406:
I have to note, that the main power switch was off while measuring

capt bullshot:
Your description is unclear.
My crystal ball says: This could be the residual charge of the EMC (X class) capacitor across the PSU input.
Yes, it's normal for older units, modern stuff must discharge this capacitor within a few seconds (by applicable safety regulations), most probably because people had experiences like you.

objekt406:
How can i describe it better for you, so its clearer? :)

TimFox:
For example, I read your post and his answer to  indicate the following description:
1.  You shut off the PSU at its power switch.
2.  You unplugged the PSU's power cable from the outlet.
3.  You touched a contact on the power plug and felt a shock.
4.  You did the same with another PSU and measured a very small voltage at the plug.
Before I retired, I found that people (both co-workers and customers) were afraid to over-specify a situation when reporting a problem.

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