Charge Your Cell Phone In 5 Seconds

cat of curiosity

Well-Known Member
I think 20-30 amps at any AC residential-volatage is an ass-ton, 240 or 115, but more importantly the higher voltage literally BLASTS you off, it's the lower voltage that causes your muscles to contract and exposing you to a longer shock.
I don't know what you mean by 240volts being in sync with the body, you lost me there.
But amps still won't do much if the voltage is low.
Seriously though, the 115 isn't bad at all, compared to a high voltage DC shock, as far as pain goes and overall physical discomfort. Distributor-less ignition systems hurt like a BITCH, same concept as a taser, only higher. Never been tased though... Is that a word? Tased? Or Tazed? whatever
i've been knocked around a handful of times (and every one is too many). 120v hurts, even if you aren't grounded. 240v hurts less, but has more of a knock down, rather than a grab and hold. i'd have to dig to back up the 240v thing, but it's there.

and tazers blow. big time. it's like getting hung on a 12ov circuit, causing full contraction rather than a blow.
 

greasemonkeymann

Well-Known Member
i've been knocked around a handful of times (and every one is too many). 120v hurts, even if you aren't grounded. 240v hurts less, but has more of a knock down, rather than a grab and hold. i'd have to dig to back up the 240v thing, but it's there.

and tazers blow. big time. it's like getting hung on a 12ov circuit, causing full contraction rather than a blow.
nah, I wasn't arguing, I just never heard that before, interested to hear about it.
 

cat of curiosity

Well-Known Member
nah, I wasn't arguing, I just never heard that before, interested to hear about it.
i'll see what i can find later; i remember it from a navy log and conversation with a supervisor, but i'll see what i can come across... i'll say this; i've gotten burns and thrown from 240v, the opposite of the contractions from 120v. lets see what i can find, maybe an et or engineer can chime in meanwhile.
 

cat of curiosity

Well-Known Member
what i'm finding doesn't exactly back up my statement. it's more along the lines of half the amperage and twice the voltage, but could cause less damage being double phase, and alternatively hitting rather than single phase (easier to break from the circuit than 120v).

both are deadly, which goes unsaid. i'll post if i get something more concrete.
 

Husseinps

Well-Known Member
It is the power that determines the severety of a shock : power is amps*volts
Power is the rate of energy at which it transforms
 

waterdawg

Well-Known Member
it's amps that kill ya... current is a bitch. personally i'd rather get hit by a 240v line at 20-30 amps than the same at 12o... 240 is more in sync with the body...
Huh??? Can you elaborate please? I'm not sure I understand what you mean by body's more in sync?
 

heckler73

Well-Known Member
Bibliographic Entry Result
(w/surrounding text)
Standardized
Result
Cutnell, John D., Johnson, Kenneth W. Physics. 4th ed. New York, NY: Wiley, 1998.
"Currents of approximately 0.2 A are potentially fatal, because they can make the heart fibrillate, or beat in an uncontrolled manner." 0.2 A
Carr, Joseph J. Safety for electronic hobbyists. Popular Electronics. October 1997. as found in Britannica.com.
"In general, for limb-contact electrical shocks, accepted rules of thumb are: 1-5 mA is the level of perception; 10 mA is the level where pain is sensed; at 100 mA severe muscular contraction occurs, and at 100-300 mA electrocution occurs." 0.1–0.3 A
"Electrical Injuries." The Merck Manual of Medical Information: Home Edition. Pennsylvania: Merck, 1997.
"At currents as low as 60 to 100 milliamperes, low-voltage (110-220 volts), 60-hertz alternating current traveling through the chest for a split second can cause life-threatening irregular heart rhythms. About 300-500 milliamperes of direct current is needed to have the same effect." 0.06–0.1 A
(AC)

0.3–0.5 A
(DC)
Zitzewitz, Paul W., Neff, Robert F. Merrill Physics, Principles and Problems. New York: Glencoe McGraw-Hill, 1995.
"The damage caused by electric shock depends on the current flowing through the body -- 1 mA can be felt; 5 mA is painful. Above 15 mA, a person loses muscle control, and 70 mA can be fatal." 0.07 A
Watson, George. SCEN 103 Class 12. University of Delaware. March 8, 1999.
"0.10 death due to fibrillation
> 0.20 no fibrillation, but severe burning, no breathing"
0.1–0.2 A
Miller, Rex. Industrial Electricity Handbook. Peoria, IL: Chas. A. Bennet, 1993.
"Currents between 100 and 200 mA are lethal." 0.1–0.2 A


A common misconception is that larger voltages are more dangerous than smaller ones. However, this is not quite true. The danger to living things comes not from the potential difference, but rather the current flowing between two points. The reason that people may believe this can be explained by the equation V = IR. Since V is directly proportional to I, an increase in voltage can mean an increase in current, if resistance (R) is kept constant.


The amount of damage done by the electric shock depends not only on the magnitude of the current, but it also on which portions of the body that the electric current is flowing through. The reason for this is that different parts of the body have difference resistances, which can lead to an increase in current, evidenced by the formula V = IR.


An interesting fact to note is that it takes less alternating current (AC) to do the same damage as direct current (DC). AC will cause muscles to contract, and if the current were high enough, one would not be able to let go of whatever is causing the current coursing through the body. The cut-off value for this is known as the "let-go current". For women, it is typically 5 to 7 milliamperes, and for men, typically 7 to 9 milliamperes. This is dependent on the muscle mass of the individual.



In general, current that is fatal to humans ranges from 0.06 A to 0.07 A, depending on the person and the type of current.


Jack Hsu -- 2000


http://hypertextbook.com/facts/2000/JackHsu.shtml
 

BROBIE

Well-Known Member
Ohm's law is your friend.
and sure 100 miliamps could kill you, gotta remember @ what voltage though.
100 MA @ a half volt won't do much, but at 100,000 volts it could stop your heart
100 milliamps is only a third of the equation
A coilpack for a car's ignition is frequently around 80k to 150k volts, but relatively low amperage, I've gotten nailed a couple times (sweaty insulated gloves during cyl balance test) and it hurts a whole lot, and I flew about 2 meters when it happened, I played football for years as a youth, and it felt exactly like a blindside block.
My chest felt weird for about 8 hrs after, and I probably shoulda gone to the doc....
point is, I've gotten shocked from a 115 AC syatem, and that was a cakewalk, compared to the coilpack.
anyways. Ohms law is something ALL indoor growers should be familiar with.
100ma at ANY given voltage can kill you. 100ma is 100ma of current ripping your outer valance electrons of atoms in your body, regardless of where or how much voltage or resistance.

I= E/R so at a given resistance (your body) it takes a certain amount of voltage to reach that magic death number of 100ma !! Why a taser doesn't kill you is because the current supplied is short and limited (Tat Tat TAt TAt TAT limited power P=iE) and localized across a short portion of your body. 120 volts across your chest dry may not kill you but lay in a bathtub...... R is much much lower.


EDIT: I'm WAY too late on this one.
 
Last edited:

greasemonkeymann

Well-Known Member
100ma at ANY given voltage can kill you. 100ma is 100ma of current ripping your outer valance electrons of atoms in your body, regardless of where or how much voltage or resistance.

I= E/R so at a given resistance (your body) it takes a certain amount of voltage to reach that magic death number of 100ma !! Why a taser doesn't kill you is because the current supplied is short and limited (Tat Tat TAt TAt TAT limited power P=iE) and localized across a short portion of your body. 120 volts across your chest dry may not kill you but lay in a bathtub...... R is much much lower.


EDIT: I'm WAY too late on this one.
You are right, 100 ma CAN kill some people, but it's not lethal to all, it's not like the electric chair or anything. And from what I've been told/taught at automotive electronics courses, that the magic number is 200 ma, but we're splitting hairs. But if we're to do that, hell a LOT less than 100 milliamps can be lethal, depends on the person, voltage, resistance (like you mentioned), riding a wet mechanical bull on a hill in a rain storm...:fire:
 

BROBIE

Well-Known Member
You are right, 100 ma CAN kill some people, but it's not lethal to all, it's not like the electric chair or anything. And from what I've been told/taught at automotive electronics courses, that the magic number is 200 ma, but we're splitting hairs. But if we're to do that, hell a LOT less than 100 milliamps can be lethal, depends on the person, voltage, resistance (like you mentioned), riding a wet mechanical bull on a hill in a rain storm...:fire:
Lathering up in oil and playing with a plug-in vibrator.........
 

Nevaeh420

Well-Known Member
Can we get back on topic?

This thread is supposed to be about super capacitors, and applications for super capacitors.

What would you guys use a super capacitor for?

~PEACE~
 
Top