[docfr8]

[gatagato]

Originally Posted by ViraA ↗

Hey there,

Overhead lines carry 25Kv (Kilovolts) which is 25,000 volts.

Direct contact would mean instant death, as you've seen in the video.

In many cases a shock of 25,000 volts will be LESS deadly than a 45 volts one: it is the amount of current (amperes) forced though your body what will kill you, not the voltage, of course depending on the body resistance between the points of contact.


Above 10 milliamps, muscular contractions become so strong that you are unable to leave the wire wire that is shocking you (this occurs often in houses NOT equipped with a Residual-current device [ALCI, GFCI or GFI in the US, RCD in the UK, RCBO if it includes also a overcurrent protection). In Italy, for example, the law prescribes RCDs with no more than 30 milliamps residual current, and you have to install at least two separate RCDs for separate domestic circuits.
Between 20 and 75 milliamps, breathing becomes labored, in the worst cases it can cease completely.
As the current reaches 100 milliamps, ventricular fibrillation of the heart occurs, killing you for sure.
Over 200 milliamps, the muscular contractions will clamp your heart, which will prevent episodes of ventricular fibrillation, paradoxically saving your ass.

All this, regardless the voltage.

[fatter]

yeah, milliamps can kill....but this guy was roasted...maybe 500ampere through his body, burning his flesh, cooking his blood, vaporizing his brain....within milliseconds....idiot...

[jbell0129]

darwinism

[HarveySpecter]

ouch

[Trunkzdbz]

Horrible video, couldn't see shit.

[Teknobry]

Originally Posted by gatagato ↗

In many cases a shock of 25,000 volts will be LESS deadly than a 45 volts one: it is the amount of current (amperes) forced though your body what will kill you, not the voltage, of course depending on the body resistance between the points of contact.


Above 10 milliamps, muscular contractions become so strong that you are unable to leave the wire wire that is shocking you (this occurs often in houses NOT equipped with a Residual-current device [ALCI, GFCI or GFI in the US, RCD in the UK, RCBO if it includes also a overcurrent protection). In Italy, for example, the law prescribes RCDs with no more than 30 milliamps residual current, and you have to install at least two separate RCDs for separate domestic circuits.
Between 20 and 75 milliamps, breathing becomes labored, in the worst cases it can cease completely.
As the current reaches 100 milliamps, ventricular fibrillation of the heart occurs, killing you for sure.
Over 200 milliamps, the muscular contractions will clamp your heart, which will prevent episodes of ventricular fibrillation, paradoxically saving your ass.

All this, regardless the voltage.

45v won't kill you because it can't overcome the resistance of your own skin.

I can guarantee you in order to power a train the current needs to be greater than an amp or two

[gatagato]

Originally Posted by Teknobry ↗

45v won't kill you because it can't overcome the resistance of your own skin.

I can guarantee you in order to power a train the current needs to be greater than an amp or two

Are you serious when you say that 45 volts "won't kill you"?
If your skin is dry then the electrical resistance will be about 1k-10k ohms, so your ass is safe, for sure.
BUT if wet, then it may reach up to 200 ohms.
In this case, i can kill you with a 10$ Nokia phone battery charger. Be serious, someone may take you seriously and believe that what you say is true. You are virtually putting in danger the lives of those who have the bad luck to read your post: and on top of that, it's obvious that you have no clue what you are talking about.
The derived unit of electrical resistance can be established with MUCH precision, there's no room for speculations.
Voltage by itself means nothing. I touch cables carrying 12,000V on daily basis, all i need is a pair of gloves which cost is 40€, made in Germany, and a pair of boots resistent to up to 30,000. If i forget to wear those gloves, i get roasted.
But NOT by the voltage: it's amperage what would kill me, NOT the voltage by itself.
I can kill you even with 45 volts, very easily, man: and if you don't believe me, we can do an experiment ( on YOUR skin) and share the results here (in this very section of the board, i mean). Do you want to try? It's free, i don't want to be paid for this.

[Teknobry]

Originally Posted by gatagato ↗

In many cases a shock of 25,000 volts will be LESS deadly than a 45 volts one:

And you're saying I'm chatting sh1t?

45v exposed cable carrying 1amp.
25,000v exposed cable carrying 1amp.

Which would you touch?

Originally Posted by gatagato ↗

Are you serious when you say that 45 volts "won't kill you"?
If your skin is dry then the electrical resistance will be about 1k-10k ohms, so your ass is safe, for sure.
BUT if wet, then it may reach up to 200 ohms.
In this case, i can kill you with a 10$ Nokia phone battery charger. Be serious, someone may take you seriously and believe that what you say is true. You are virtually putting in danger the lives of those who have the bad luck to read your post: and on top of that, it's obvious that you have no clue what you are talking about.
The derived unit of electrical resistance can be established with MUCH precision, there's no room for speculations.
Voltage by itself means nothing. I touch cables carrying 12,000V on daily basis, all i need is a pair of gloves which cost is 40€, made in Germany, and a pair of boots resistent to up to 30,000. If i forget to wear those gloves, i get roasted.
But NOT by the voltage: it's amperage what would kill me, NOT the voltage by itself.
I can kill you even with 45 volts, very easily, man: and if you don't believe me, we can do an experiment ( on YOUR skin) and share the results here (in this very section of the board, i mean). Do you want to try? It's free, i don't want to be paid for this.
Attachment 560320

You're creating a straw man argument here. Yes, you can engineer circumstances where you can kill someone with 45v, but as it's the voltage which pushes the current through the resistance you'd have to have someone nicely greased up with low impedance in order to electrocute them.
Why do you think power tools work off 110v? max voltage shock you could get is 55v, which is considered safe as it cannot (except in ridiculous circumstances which you're talking about) electrocute you.

Yes, I work with very high voltage and amps daily.

[gatagato]

Originally Posted by Teknobry ↗

And you're saying I'm chatting sh1t?

45v exposed cable carrying 1amp.
25,000v exposed cable carrying 1amp.

Which would you touch?





You're creating a straw man argument here. Yes, you can engineer circumstances where you can kill someone with 45v, but as it's the voltage which pushes the current through the resistance you'd have to have someone nicely greased up with low impedance in order to electrocute them.
Why do you think power tools work off 110v? max voltage shock you could get is 55v, which is considered safe as it cannot (except in ridiculous circumstances which you're talking about) electrocute you.

Yes, I work with very high voltage and amps daily.

Look, despite your post doesn't sound very nice, im happy to see that you're not an ignorant. A reason MORE to avoid to say something that you know it's not true.
My point was that to claim that 45v cannot kill you is a plain WRONG statement, especially coming from someone who works on this shit. One kid that listens from you that to do whatever he wants with a battery charger is safe may die. It's true, it may occur only under some RARE circumstances (without me necessarily engineering them), but it may occur. And you know it.
To say that it can't occur is much different. And where power tools work up to 110v? Do you think that 110 volt line is the standard worldwide? Here it's 220v and anyway voltage is the only value that we know for sure along with the watts: the rest can be determined after calculations considering variables and all the rest. For example, in Germany they connect the neutral to the protective earth/ground: if you do that in Italy or in France, you'll get arrested. However, both system are super-safe. Nobody dies electrocuted in any of these countries, while taking a shower. What matters is that in the electrical system that you design for a home (just an example) the amperes (in transit) resulting from a 3kw must be lower than 16amperes: not 0.16, 16/full.
Now comes the funniest part: according to the laws in Italy, you're ok if soil resistivity is above 20 ohm ( the law is DPR 547/55) HOWEVER, If i read a value below 166 i won't proceed, since that would be put at risk human lives.
That law was written in 1955. And it's still effective.

Sorry if it came out the wrong way, the only problem i had was with the "can't kill you" part: since you're educated, share your knowledge, don't say things that you know they aren't true.