🚀 go-pugleaf

J.A. Legris wrote:
> On Mar 8, 10:35 am, Sylvia Else <syl...@not.at.this.address> wrote:
>> Sylvia Else wrote:
>>> I've recently bought a D-Link DIR-300 wireless router. While
>>> disconnecting its power supply from it, I got a tingling sensation when
>>> I touched the plug (to be clear, I'm talking about the 5V DC plug, not
>>> the mains plug).
>>> An AVO meter shows about 90V AC to earth from either side of the 5V
>>> plug. Short circuit current to earth is about 0.1mA.
>>> Still, I thought these things were meant to be completely isolated. Has
>>> there been a change of approach?
>>> Sylvia.
>> Apparently it's normal, and is related to RFI suppression.
>>
>> Sylvia.
> 
> Just think, the only thing between you and the great beyond is a thin
> layer of ceramic material, possibly contaminated with who-knows-what,
> bearing a certification logo of dubious authenticity. It's time to
> invest in some rubber-soled slippers.

It's certainly not a happy thought. I will be treating the low voltage 
side of such power supplies with more respect from now on.

BTW, I tried the same tests with the power supply for my cable modem. It 
showed higher voltages, but lower current.

But immediately after I'd unplugged it from the mains, I happened to 
touch the mains plug pins with the palm of my hand, and got a 
significant shock off it. Reverse leakage through the rectifiers? But 
why should there even be enough to feel?

Sylvia.