Grond and earth tingles

[imstuee123]

Hi all. I have this power supply which is connected to 240v L N E.
It has 244v dc. 12v dc and 5vdc outputs.
I have my nuc pc piggybacked on the 240v terminals as that uses its own psu.
The issue is any casing etc on the unit or arcade controls terminals [usb) all give a tingle.
I did look and see the earth is linked to the gnd too.

Is this right or something wrong. I have 10 of these and all the same.

 

[imstuee123]

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[Galgso]

If you have a multimeter do a continuity check between the ground screw terminal on the PSU and the earth pin on the mains plug feeding the PSU. You should get low resistance (less than 1Ω). If you do get continuity, check if the USB connector metal shields are also grounded properly using the same technique.