3 ms·
As others have said, that's not it. It's the line filter capacitors in the power supply. There's two types: X capacitors which filter differential noise (betwee
by Gracana 6y ago
As others have said, that's not it. It's the line filter capacitors in the power supply. There's two types: X capacitors which filter differential noise (between line and neutral) and Y capacitors which filter common mode noise (between line and chassis.) Some small AC current (microamps) will pass through the Y capacitor to the chassis. If the chassis is ungrounded, you may be able to feel the current when you touch it.