Electronic Fence

[capwizard]

How many volts to be used on the electronic fence for Zoo or cow ranch?

If Trump wants to use the electronic fence, how many Tesla towers need and is that possible to achieve it? Would it be cheaper than the 8 billion dollars? Please, Do not have political opinions and humanitarianism.

How many volts, DC, AC or PWM and currents for electrocution, I mean electric chair?

[Curious.George]

Re: Electronic Fence

How many volts to be used on the electronic fence for Zoo or cow ranch?

If Trump wants to use the electronic fence, how many Tesla towers need and is that possible to achieve it? Would it be cheaper than the 8 billion dollars? Please, Do not have political opinions and humanitarianism.

How many volts, DC, AC or PWM and currents for electrocution, I mean electric chair?

You need just enough potential to break down skin resistance (assuming the victim is directly connected to the conductors -- if clothing is present, then a higher potential is required).

Death is most easily caused by passing a current through the heart. This is one reason why you want to keep one hand in your pocket when working on electrical things (avoid the easy circuit from one hand to the other!).

Figures as low as 10mA AC have been reported to be sufficient to cause Vfib -- though I think 30-100mA is more of the "get 'er done" figure. At DC, you're typically looking at much higher (300-500) levels.

There are all sorts of factors that can make things better or worse (for the victim). E.g., at 100mA, muscles tend to act on their own. So, 100mA could prevent your hand from releasing the wire that is inflicting its damage on you! An opening in the skin can drop the overall resistance to ~100 ohms meaning 10V would be fatal) instead of the ~1K+ that the skin normally imposes. And, obviously, current traveling from hand to foot (grabbing a power line) has a higher resistance to overcome than hand to hand (through the heart).

The "Electric Chair" goes for overkill -- the "victim" is effectively cooked.

[brethin]

Re: Electronic Fence

Electric fences don't use AC they use DC and low current, the object is to inflect pain not death.

[eccerr0r]

Re: Electronic Fence

The main reason for not inflicting death is if it dies on the electric fence, it will short, and now the fence no longer is active against other animals trying to get across...

Those tesla coils in the pictures will need to get to millions of volts to break through the dielectric strength of air, the resistance of an animal/human is much less and is negligible. Let's say there's about 30 meters between the target and the generator, at 30kV/cm, one needs to hit 90 megavolts to break a spark.

After a hit, resistance will drop to 1/100th of its level, so only need 900KV or so to maintain the spark. However one needs 20mA to feel something versus just see something. So this contraption needs to expend 18 kilowatts for the duration of that person standing in the field. If a caravan went through, you'd have to multiply the wattage by number of people.

And all of this can be circumvented by just wearing an aluminum foil shield. Want to go 20A to fry the aluminum foil (slowly)? Can you supply 18 megawatts for a few moments to melt the foil (which can worked around with 10 gauge copper wire)? This would also require a whole power plant on standby, and if that person doesn't have the metal, it's death...

Remember these 18KW/18MW numbers are not dissipated within the person, but within the air making the blue lighting. Much less is frying the person. Man made lightning, that's ultimately what one wants?