4 ms·
> respectively not sure I follow you. can you clarify what you mean by both 225v and 230v to ground? You are measuring the potential between ground and USB out
by anonu 3y ago
> respectively
not sure I follow you. can you clarify what you mean by both 225v and 230v to ground? You are measuring the potential between ground and USB output?
- red_trumpet 3y agoThere are two pins. One has 225V to ground, the other one has 230V to ground. So the voltage from pin to pin is still 230V-225V = 5V.
- lxgr 3y agoYes, and given that USB devices usually don’t have protective grounding (since they expect to be supplied 5V to ground at most!), you just might be what eventually provides that ground connection when you touch a conducting part of the case…
- ronsor 3y agoSurely this is a violation of the specifications?
- moqmar 3y agoDefinitely at least electrical standards in most countries, and probably USB also specifies that the voltage needs to be isolated from mains. But yeah, usually those are illegal to be sold.