37 ms·

No, they're not. Two-prong power supplies need to have EMI suppression capacitors which connect the secondary side of the power supply's transformer to mains [1

No, they're not. Two-prong power supplies need to have EMI suppression capacitors which connect the secondary side of the power supply's transformer to mains [1]. The mains voltage is present on the output, but the maximum current is low enough that it is safe. It is considered not an issue by manufacturers [2] and it is a fact of many practical power supply designs. Please have any idea what you're talking about before you throw around technical terms like "galvanically isolated". You're clearly not an EE. [1] https://electronics.stackexchange.com/questions/478607/feeling-a-tingling-sensation-by-touching-stuff-is-this-safe https://electronics.stackexchange.com/questions/478607/feeli... [2] https://www.dell.com/en-us/blog/notebook-tingle-sensation-what-39-s-going-on/ https://www.dell.com/en-us/blog/notebook-tingle-sensation-wh...

xani_ 4y ago
Being connected via 2 caps is considered "galvanically isolated" If you're feeling "tingling sensation" your protection caps are fucked Mr. EE
- boltzmann-brain 4y ago
  Galvanic isolation means "no current is allowed from primary to secondary side". This is true of capacitors... but only in theory. Real life capacitors have leakage resistance and therefore do not, in practice, form full galvanic isolation.
megous 4y ago
Capacitive coupling still counts as galvanically isolated. Dielectric resistance of typical Y caps is in GOhm range, so that's basically galvanically isolated, unless you're some kind of purist. You certainly will not be able to feel that. Reactance of a typical Y capcaitor at 50Hz is in the range of single unit MOhm so even that does not cross perception thresholds of most individuals even at 230 V. But it may for some, I guess.
megous 4y ago
Also what the heck with the first link. Apliances with metal enclosure must be grounded. That guy has no business having 50V against ground on the metal enclosure.

xani_ 4y ago

Being connected via 2 caps is considered "galvanically isolated" If you're feeling "tingling sensation" your protection caps are fucked Mr. EE

boltzmann-brain 4y ago
Galvanic isolation means "no current is allowed from primary to secondary side". This is true of capacitors... but only in theory. Real life capacitors have leakage resistance and therefore do not, in practice, form full galvanic isolation.

megous 4y ago

Capacitive coupling still counts as galvanically isolated. Dielectric resistance of typical Y caps is in GOhm range, so that's basically galvanically isolated, unless you're some kind of purist. You certainly will not be able to feel that. Reactance of a typical Y capcaitor at 50Hz is in the range of single unit MOhm so even that does not cross perception thresholds of most individuals even at 230 V. But it may for some, I guess.

megous 4y ago

Also what the heck with the first link. Apliances with metal enclosure must be grounded. That guy has no business having 50V against ground on the metal enclosure.