I have encountered several articles and posts saying that what electrocute you and cause death is actually not the voltage but the current instead but is not clear to me how this works.
In: Physics
Voltage and current are related in the form voltage=current*resistance
So to have a high current tour a human you need high voltage too. What is really dangerous to you is the energy delivery to you that is voltage*current*time. Something with high voltage can drop quickly when you short it like in a static discharge, Then you have high current and high voltage but a fraction of seconds and very little energy.
The confusion is because it is quite easy to get a high voltage like with static electricity and measure it when nothing is connected to it. The problem is that holds very little charge and when the electrons start to pass trough you the voltage drops quickly.
Current is measured when it flows so measure it harder because in static discharge it might be a million of a second long
So you have a high voltage over you a high current trough you for a very short time and the energy it can deliver is so low that is does not damage you.
so any demonstration that shows that high voltage is not dangerous the voltage will drop when a human touches the device.
If the thing you touch has is not a static charge but a part of the power grid the voltage will remain high when you touch it and therefore a high current and a lot of energy deliver trough you and you are likely killed.
It is not possible to deliver high current at low voltage Look at [this video](https://www.youtube.com/watch?v=XDf2nhfxVzg) by electoBOOOM with a 20V 150A power supply that you can use to weld metal because of the low resistance in the metal. But he does it with one the positive electrons in one hand and the negative in the other. So the voltage is so low that the current and therefore the energy delivered to a human is negligible.
So it is cleat that something that can deliver a high current is not dangerous is the voltage is low enough.
Both the voltage over the source and the current it can deliver over time is what determine danger.
This is [another video](https://www.youtube.com/watch?v=DOMs7mYm_zs) from ElectroBOOM on the same subject. It end in the following
>It is not necessarily a supply voltage at no load, ut the amount of current it can provide when touched that indicates how much hurting you shall receive.
Because a touched supply voltage may drop if its current is somehow limited.
There is a reason you have “high voltage” warning signs not high “high current”. The high sustained voltage will kill you because it results in a high sustained current.
High current and lowe voltage trough a human is not possible because we have quite high resistance, voltage=current*resistance
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