4 ms·

20V over 5A could definitely kill someone.

by matmann2001 12y ago

rasz_pl 12y ago
in order to pump 5A with only 20A you would first need to liquefy someones flesh
- ars 12y ago
  You should stop posting false information. A simple wound is enough. 5A @ 20V is 4 ohm. A wound is lower than that. And you don't need 20A to kill anyway. 20V with sweaty salty skin is right at the edge of dangerous territory.
  - rasz_pl 12y ago
    go ahead and stab yourself with a multimeter, your gonna read somewhere around 300-1000ohms
    - DanBC 12y ago
      http://darwinawards.com/darwin/darwin1999-50.html http://darwinawards.com/darwin/darwin1999-50.html > (1999) A US Navy safety publication describes injuries incurred while doing don't's. One page described the fate of a sailor playing with a multimeter in an unauthorized manner. He was curious about the resistance level of the human body. He had a Simpson 260 multimeter, a small unit powered by a 9-volt battery. That may not seem powerful enough to be dangerous… but it can be deadly in the wrong hands. > The sailor took a probe in each hand to measure his bodily resistance from thumb to thumb. But the probes had sharp tips, and in his excitement he pressed his thumbs hard enough against the probes to break the skin. Once the salty conducting fluid known as blood was available, the current from the multimeter travelled right across the sailor's heart, disrupting the electrical regulation of his heartbeat. He died before he could record his Ohms. "It's the volts that jolt but the mills that kill" - voltage gives you the electric shock feeling but current across the heart will kill you.
      - zyx321 12y ago
        It's a Darwin Award because you have to go out of your way to achieve it. When was the last time you plugged in a USB device while bleeding profusely from both hands and/or standing barefoot in a pool of your own blood? Unless you are actively, visibly bleeding, it's going take well over 50V to cause any sort of lasting harm. Not to mention that it'll almost certainly default to 5V unless both ends are plugged in to devices supporting higher voltage.
        DanBC 12y ago
        He was not bleeding profusely from both hands nor standing in a pool of blood. He stuck the probes into his thumbs. This sub thread is not so much about whether it is probable that a person will die but whether it is possible that a person could die. And, with some convolutions, you can work out a situation where a person could indeed die. Importantly rasz_pl is claiming that 50 mA cannot kill you. The rule of thumb is 50 mA at 50 V across the heart is enough to kill you. This voltage level is dropped if the skin is broken - and you don't need a big wound. If you're saying it's fantastically unlikely to actually happen: I agree.
        rasz_pl 12y ago
        so many clueless people downvoting :/ >50 mA at 50 V across the heart is enough to kill you. 1 Voltage doesnt matter! 2 AC 60hz, not DC. I dont know the state of safety education in US, but in Europe it was the first thing on the first day of EE lab. Quick google: "The threshold for ventricular fibrillation for direct current shocks longer than 2 seconds is 150 mA as compared with 50 mA for 60-Hz shocks; for shocks shorter than 0.2 seconds, the threshold is the same as that for 60-HZ shocks, that is, approximately 500 mA" so >2 seconds at 45 volts if you jam two live wires at 45V into your open wounds across the heart and here are some funny, but educational yt clips https://www.youtube.com/watch?v=hp97GjuULX8 https://www.youtube.com/watch?v=hp97GjuULX8 https://www.youtube.com/watch?v=XDf2nhfxVzg https://www.youtube.com/watch?v=XDf2nhfxVzg
        DanBC 12y ago

20V over 5A could definitely kill someone.

rasz_pl 12y ago

in order to pump 5A with only 20A you would first need to liquefy someones flesh

ars 12y ago
You should stop posting false information. A simple wound is enough. 5A @ 20V is 4 ohm. A wound is lower than that. And you don't need 20A to kill anyway. 20V with sweaty salty skin is right at the edge of dangerous territory.
- rasz_pl 12y ago
  go ahead and stab yourself with a multimeter, your gonna read somewhere around 300-1000ohms
  - DanBC 12y ago
    http://darwinawards.com/darwin/darwin1999-50.html http://darwinawards.com/darwin/darwin1999-50.html > (1999) A US Navy safety publication describes injuries incurred while doing don't's. One page described the fate of a sailor playing with a multimeter in an unauthorized manner. He was curious about the resistance level of the human body. He had a Simpson 260 multimeter, a small unit powered by a 9-volt battery. That may not seem powerful enough to be dangerous… but it can be deadly in the wrong hands. > The sailor took a probe in each hand to measure his bodily resistance from thumb to thumb. But the probes had sharp tips, and in his excitement he pressed his thumbs hard enough against the probes to break the skin. Once the salty conducting fluid known as blood was available, the current from the multimeter travelled right across the sailor's heart, disrupting the electrical regulation of his heartbeat. He died before he could record his Ohms. "It's the volts that jolt but the mills that kill" - voltage gives you the electric shock feeling but current across the heart will kill you.
    - zyx321 12y ago
      It's a Darwin Award because you have to go out of your way to achieve it. When was the last time you plugged in a USB device while bleeding profusely from both hands and/or standing barefoot in a pool of your own blood? Unless you are actively, visibly bleeding, it's going take well over 50V to cause any sort of lasting harm. Not to mention that it'll almost certainly default to 5V unless both ends are plugged in to devices supporting higher voltage.
      - DanBC 12y ago
        He was not bleeding profusely from both hands nor standing in a pool of blood. He stuck the probes into his thumbs. This sub thread is not so much about whether it is probable that a person will die but whether it is possible that a person could die. And, with some convolutions, you can work out a situation where a person could indeed die. Importantly rasz_pl is claiming that 50 mA cannot kill you. The rule of thumb is 50 mA at 50 V across the heart is enough to kill you. This voltage level is dropped if the skin is broken - and you don't need a big wound. If you're saying it's fantastically unlikely to actually happen: I agree.
        rasz_pl 12y ago
        so many clueless people downvoting :/ >50 mA at 50 V across the heart is enough to kill you. 1 Voltage doesnt matter! 2 AC 60hz, not DC. I dont know the state of safety education in US, but in Europe it was the first thing on the first day of EE lab. Quick google: "The threshold for ventricular fibrillation for direct current shocks longer than 2 seconds is 150 mA as compared with 50 mA for 60-Hz shocks; for shocks shorter than 0.2 seconds, the threshold is the same as that for 60-HZ shocks, that is, approximately 500 mA" so >2 seconds at 45 volts if you jam two live wires at 45V into your open wounds across the heart and here are some funny, but educational yt clips https://www.youtube.com/watch?v=hp97GjuULX8 https://www.youtube.com/watch?v=hp97GjuULX8 https://www.youtube.com/watch?v=XDf2nhfxVzg https://www.youtube.com/watch?v=XDf2nhfxVzg
        DanBC 12y ago