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(CBC)   "Siri, how much current will it take to electrocute a human being?" Siri, "let me show you"   (cbc.ca) divider line 37
    More: Scary, iPhone, mobile telephones, Xinjiang, Chinese woman, Sirius, Xinhua News Agency, Apple Inc.  
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2139 clicks; posted to Business » on 15 Jul 2013 at 4:19 PM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



37 Comments   (+0 »)
   
View Voting Results: Smartest and Funniest
 
2013-07-15 04:24:29 PM
meh
was water involved?
was it plugged into a GFCI?

get back to me with details
 
2013-07-15 04:25:28 PM
Would you like me to search the web for "how much current will it take to electrocute a human being?"
 
2013-07-15 04:32:04 PM
In April, Apple apologised to Chinese consumers and altered iPhone warranty policies in its second-biggest market after its after-sales service suffered more more than two weeks of condemnation by the state-run media.

I'd be  interested to learn the nature of the changes in their warranty policies, maybe something along the lines of You are not covered if you are electrocuted?
 
2013-07-15 04:43:01 PM
images.wikia.com

Amateur.
 
2013-07-15 04:44:07 PM
According to this chart, an iPhone wall charger delivers 1 amp. I believe that's enough to kill.

Still, this story seems a tad lacking in details.
 
2013-07-15 04:44:38 PM
In April, Apple apologised to Chinese consumers and altered iPhone warranty policies in its second-biggest market after its after-sales service suffered more more than two weeks of condemnation by the state-run media.

farm1.staticflickr.com

The recent spate of criticisms of Apple have absolutely nothing to do with our support for Xiaomi, just as the problems experienced with using Google in China have nothing to do with our support for Baidu.
 
2013-07-15 04:45:41 PM
I'm guessing it was a combination of a cheap third-party charger and reversed hot/neutral house wiring.
 
2013-07-15 04:50:37 PM

Ivo Shandor: I'm guessing it was a combination of a cheap third-party charger and reversed hot/neutral house wiring.


Yep. If the mains voltage hot wire substituted for the neutral, and the charger somehow allowed the neutral to be connected to one side of the USB plug (or whatever it is Apple use), hilarity could ensue, particularly if the user grabbed a fully grounded object in her other hand.
 
2013-07-15 05:00:30 PM

MrEricSir: According to this chart, an iPhone wall charger delivers 1 amp. I believe that's enough to kill.

Still, this story seems a tad lacking in details.


Not enough volts then.

Mains is the culprit.
 
2013-07-15 05:01:23 PM

Stile4aly: [images.wikia.com image 850x637]

Amateur.


Now, if Siri could release a deadly neurotoxin, that would be something...
 
2013-07-15 05:02:10 PM

MrEricSir: According to this chart, an iPhone wall charger delivers 1 amp. I believe that's enough to kill.

Still, this story seems a tad lacking in details.


The original microblog said it was an iPhone4.  But regardless - why are news critters repeating something that was written on a chinese microblog without any further proof?

/oh wait ... yea click counts ...
 
2013-07-15 05:03:55 PM
Apple declined to say whether the deadly incident, in which a woman was electrocuted when she took a call from a charging iPhone, was an isolated case.

Because, of course, cell phone electrocutions usually go totally under the radar.  Who would even bother to report them, really.
 
2013-07-15 05:24:02 PM
 
2013-07-15 05:32:03 PM

MrEricSir: According to this chart, an iPhone wall charger delivers 1 amp. I believe that's enough to kill.

Still, this story seems a tad lacking in details.


The chargers provide 1 amp at 5 volts.   The voltage is so small, there's no way the current would even break the skin if it were dry, much less pass to her heart to kill her.  A 9 small Volt battery you'd put in a smoke detector can supply more power than that and you can press both terminals to your hand w/ out a shock - lick the terminals even if you want an uncomfortable tingling sensation.

It's true that it doesn't take many amps to stop someone's heart, but it usually takes a large voltage to overcome the human body's natural resistance to get to the heart to stop it.   It takes a combination of volts and amps to kill.

I doubt the cable attached to the phone and charger could handle the power necessary to electrocute her - it'd probably catch fire first.

The amps matter much more than the voltage, but skin has a high resistance and with V=IR, the voltage is proportional to the resistance.    Say 2 spots on the skin were 500 ohms resistance, then to provide 1 amp, that's 500 volts required. Tazers are usually close to a million volts, but low amps so as not to kill.
 
2013-07-15 05:37:27 PM

MrEricSir: According to this chart, an iPhone wall charger delivers 1 amp. I believe that's enough to kill.

Still, this story seems a tad lacking in details.


From what I was told, it takes about 0.3 Amps and 30 Volts to be fatal, meaning that's enough to stop your heart.
 
2013-07-15 05:37:50 PM
seems legit.
 
2013-07-15 06:29:23 PM

StoPPeRmobile: MrEricSir: According to this chart, an iPhone wall charger delivers 1 amp. I believe that's enough to kill.

Still, this story seems a tad lacking in details.

Not enough volts then.

Mains is the culprit.


THIS
 
2013-07-15 06:31:40 PM

Befuddled: MrEricSir: According to this chart, an iPhone wall charger delivers 1 amp. I believe that's enough to kill.

Still, this story seems a tad lacking in details.

From what I was told, it takes about 0.3 Amps and 30 Volts to be fatal, meaning that's enough to stop your heart.


Except those chargers can be plugged into USB, which is 5V.  5V is not enough to do basically anything unless you stab it through your chest and into your heart.
 
2013-07-15 06:32:13 PM
Nobody seems to have posted pictures of just how cute this poor lass was.

www.quantrimang.com.vn

www.ladyblitz.it

(A couple examples - more available via GIS.)
 
2013-07-15 06:33:50 PM

Ivo Shandor: I'm guessing it was a combination of a cheap third-party charger and reversed hot/neutral house wiring.


ftfy
 
2013-07-15 06:48:00 PM
Did she buy a Chinese made counterfeit charger off of ebay?  That is my guess.
 
2013-07-15 06:53:50 PM
Ohm's law in the house!
 
2013-07-15 07:49:29 PM
That'll teach her to jailbreak an iPhone.

/Oh, and even worse, her warranty is void now too
 
2013-07-15 08:27:18 PM
Subby, you are assuming that SIRI can actually understand the spoken word.  I have found SIRI worthless in too many situations...
 
2013-07-15 09:42:28 PM

Ivo Shandor: I'm guessing it was a combination of a cheap third-party charger and reversed hot/neutral house wiring.


Because Apple could never in a million years design/manufacture a defective product

Fanbois will defend their logo to the death
 
2013-07-15 09:44:07 PM

jpo2269: Subby, you are assuming that SIRI can actually understand the spoken word.  I have found SIRI worthless in too many situations...


d24w6bsrhbeh9d.cloudfront.net
 
2013-07-15 09:53:33 PM

dantheman195: Ivo Shandor: I'm guessing it was a combination of a cheap third-party charger and reversed hot/neutral house wiring.

Because Apple could never in a million years design/manufacture a defective product

Fanbois will defend their logo to the death


I've bought my share of defective Apple products. They all failed in a manner which left me alive and able to buy more of them. Electrocution isn't Apple's style; it's bad for business.
 
2013-07-15 10:56:46 PM
Fake:
http://www.righto.com/2012/03/inside-cheap-phone-charger-and-why-you .h tml

Real:
http://www.righto.com/2012/05/apple-iphone-charger-teardown-quality. ht ml


Betting a cheapo charger was involved. "oh yeah, lets just put the USB ground shield pin 1mm away from the mains input."

Mains>USB shield>thick braided aluminium cable ground shield>phone USB shield>metal phone casing>her body>bare feet>ground. And that's how you complete circuit.


Didn't notice my stainless steel toaster oven was live until a few days ago when I had bare feet on my wet concrete floor. Have not fixed it yet :/
 
2013-07-16 12:22:07 AM
Just a phone? My half brother once did some electrical work on his house. What could go wrong, yes? When he was done the entire house was live. I don't mean it had power, I mean the entire house and every metal object inside and quite possibly every object inside period were crackling with electricity. Touch the doorknob, wake up on the sidewalk wondering why you are smouldering. This is not the only time my bro has made his house unsafe for human habitation, sadly.
 
2013-07-16 01:52:01 AM

Befuddled: From what I was told, it takes about 0.3 Amps and 30 Volts to be fatal, meaning that's enough to stop your heart.


It's a complex subject.  You can be killed by milliamps at kilovolts, or something like your numbers, but both would require very different circumstances.  30V would require open heart surgery.  In any shock, it's less about stopping your heart than throwing it out of its rhythm.  Your diaphragm can be shocked too which makes for a nasty inability to breathe even if your heart keeps going.  The good news is those kinds of shocks are ideal for CPR treatment (as opposed to someone with a massive coronary or bloodloss).

People who get exposed to a lot of amps and volts, even indirectly often have a serious problem of their clothes bursting into flames due to plasma arc.

Anyway, forget anyone who says "it's not the volts that get you it's the amps".  Better to say it's the coulombs but even that is too simplistic.  It's the farkin electricity that gets you.
 
2013-07-16 05:01:46 AM

Choo-Choo Bear: Nobody seems to have posted pictures of just how cute this poor lass was.

[www.quantrimang.com.vn image 300x399]

[www.ladyblitz.it image 291x250]

(A couple examples - more available via GIS.)


my tranny detector is slightly beeping...
 
2013-07-16 08:33:31 AM

504_King_streetcar: Just a phone? My half brother once did some electrical work on his house. What could go wrong, yes? When he was done the entire house was live. I don't mean it had power, I mean the entire house and every metal object inside and quite possibly every object inside period were crackling with electricity. Touch the doorknob, wake up on the sidewalk wondering why you are smouldering. This is not the only time my bro has made his house unsafe for human habitation, sadly.


How does one get a second chance at pissing in Darwin's face?
 
2013-07-16 09:09:42 AM
They don't call it the Lightning connector for nothing.
 
2013-07-16 09:18:54 AM
Knockoff + Bad Wiring, if she was even electrocuted by her phone at all.
 
2013-07-16 10:31:59 AM

Bacontastesgood: Anyway, forget anyone who says "it's not the volts that get you it's the amps".  Better to say it's the coulombs but even that is too simplistic.  It's the farkin electricity that gets you.


So, it's true that it is "current that gets you".  However, more often than not the current is essentially determined by voltage.  So voltage indirectly kills you anyway:

Ohm's law states that I=V/R.  So if the resistance of your body remains constant, voltage and current are directly proportional.  Of course, by the same token, if your body's resistance goes down, that also increases current for any given voltage.  A body's resistance can vary by orders of magnitude based on how wet your skin is, whether you are wearing shoes, etc.  That's why you can theoretically be killed by 30 volts, but I have also been shocked by 240V mains and am not yet dead.  But all other things being equal, 240V will pass double the current as 120V.

People start getting confused because we have a variety of power sources that don't appear to follow Ohm's law (they actually do, just we give them constraints).

The best example is a Van de Graaff generator.  This is a high voltage device, but it is current limited, meaning that even though Ohm's law would dictate a large current to flow from the voltage it produces, the device is incapable of producing more than a certain (very low) current.  So, you can touch it and see your hair stand on end without being shocked.  Van de Graaff generators are probably the primary reason why people think that voltage is "harmless".

You can also have a "current source".  A current source will produce whatever voltage is necessary to output a constant current.  A true current source would produce an infinite voltage to pass current across and infinite resistor, but in practical terms, there is always some voltage limit at which it gives up.  We don't encounter current sources much in daily life, but most lab power supplies have a constant current mode, albeit with a low voltage limit of, say, 30V.

You can also have "voltage sources" which will pass whatever current is nessesary to maintain their voltage level.  The mains is actually this--breakers and fuses notwithstanding, they are designed to be an "infinite bus" meaning that no matter how big of a load (aka how small of a resistance) you place on it, the voltage and frequency will not change.  Of course in reality, there is SOME load that can cause the voltage to collapse, but it is far more than you would be able to place on it at home (you'd blow out your transformer first).
 
2013-07-16 12:33:28 PM

Ghost Roach: 504_King_streetcar: Just a phone? My half brother once did some electrical work on his house. What could go wrong, yes? When he was done the entire house was live. I don't mean it had power, I mean the entire house and every metal object inside and quite possibly every object inside period were crackling with electricity. Touch the doorknob, wake up on the sidewalk wondering why you are smouldering. This is not the only time my bro has made his house unsafe for human habitation, sadly.

How does one get a second chance at pissing in Darwin's face?


I really don't know how he's still alive at this point. The second time involved renovations to the whole house, every room at once. He did some work in the basement, exposed and (I think) cracked the sewer line. I think he's going for a trifecta with weight loss and gain, I can assume he will be 200 lbs or so in the summer and 400 lbs by the winter and back to 200 by the next summer. Lather, rinse, repeat and tell the cardiac unit to expect him any day now.
 
2013-07-16 10:37:56 PM

Hollie Maea: So, it's true that it is "current that gets you".


Everything you say after this is true, so you understand the complexity.  So I don't get why you would say the above, because it's self-evidently meaningless.  You can be killed by milliamps.  You can survive amps.  It's a silly statement.
 
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