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Edit: great approach to understand the matter: https://youtu.be/BGD-oSwJv3E?is=Fe1FimqTCvN-aY1u
I was looking at some transformers:
But also
If it outputs 12VA (12V * 1A) of apparent power, then it receives/works with (?) 12VA apparent power. That means that the current in my 230V wall outlet is 12 / 230 ≈ 0.05A. Even a button cell can supply 0.15A per hour... This leads my uninitiated head to believe, that it is mainly high voltages that are not compatible with life.
Please advise? 🙃
The transformer will output 12w of power and use just over 50ma, but your wall outlet can supply significantly more. Using the transformer to try to say voltage kills or that your outlet supplies the same as a battery isn't acurate.
Rubbing a glass rod with a silk cloth will generate thousands of volts but very low current. Power would be in the low millijoules. It will give you a nice shock, which would hurt, but isn't lethal.
A 12v car battery can output 700+ amps through low resistance. In the right conditions it can be lethal, though it would most likely result in burns.
Voltge pushs amperage through resistance. Ohms law (Voltage = Amps x Resistance) shows that as one value increases, the others adjust.
The simplified expression is voltage hurts, amperage kills. Mostly due to the high resistance of a body.
No. They ARE NOT decoupled. At all. Period. Unless you're an idiot in today's world.
While 12v can struggle to kill someone, it still can.
While 120v isn't the end of the world, it's still FULLY capable of murdering you depending on how the current flows.
The real answer is, and ONLY is, "it depends, and you do not like the answer".
MANY shitty power supplies are FULLY capable of killing a human. The real question is: does your local government properly regulate things? (the answer is NO for 80%+ of the population, including americans)