Posted on 07/15/2013 9:40:56 AM PDT by topher
Apple said Monday it would investigate claims that a Chinese woman was killed by an electric shock she received when answering a call while the device was charging.
The claim quickly drew attention after a woman in the western region of Xinjiang wrote about the death of her 23-year-old sister Ma Ailun on China's popular microblog service Sina Weibo.
"We will fully investigate and cooperate with authorities in this matter," said Apple's Beijing-based spokeswoman Carolyn Wu, offering condolences to the family.
“uk is 110v”
Not that it matters ,but ,240V 50Hz.
Yes I was going to mention resistance. But the point of the discussion was the wire to carry the charge.
http://www.foxnews.com/tech/2013/07/15/apple-investigating-iphone-5-user-death-by-electrocution/
“He hooked up custom wiring for our homemade light bar for stage lighting.”
If there’s ever a fire, your insurance will deny you payment; the fire marshal and insurance outfits will go after and sue that electrician.
CAT5 used that way, cannot meet code anywhere except maybe in China!
How AC affects the body depends largely on frequency.
Low-frequency (50- to 60-Hz) AC is used in US (60 Hz) and European (50 Hz) households; it can be more dangerous than high-frequency AC and is 3 to 5 times more dangerous than DC of the same voltage and amperage. Low-frequency AC produces extended muscle contraction (tetany), which may freeze the hand to the current’s source, prolonging exposure. DC is most likely to cause a single convulsive contraction, which often forces the victim away from the current’s source.
AC’s alternating nature has a greater tendency to throw the heart’s pacemaker neurons into a condition of fibrillation, whereas DC tends to just make the heart stand still. Once the shock current is halted, a “frozen” heart has a better chance of regaining a normal beat pattern than a fibrillating heart. This is why “defibrillating” equipment used by emergency medics works: the jolt of current supplied by the defibrillator unit is DC, which halts fibrillation and gives the heart a chance to recover.
In either case, electric currents high enough to cause involuntary muscle action are dangerous and are to be avoided at all costs.
http://www.allaboutcircuits.com/vol_1/chpt_3/2.html
I got caught in a storm in Galveston bay. After my boat was beached, I tried to unhook the battery which was under water. There was no way! The shock from that 12 volt battery was just too strong.
Also the Merck manual states that for AC, 60 ma can be fatal.
There’s an interesting tear down of a fake Apple charger on the EEV blog site at:
http://www.eevblog.com/forum/blog/eevblog-388-fake-apple-usb-charger-teardown/msg164707/#msg164707
Lots of fake chargers circulating and essentially all skimp on safety features and good design practices.
The only suggestion I have with your CAT5 in the walls and framing now: Use only 12 volt lighting, nothing greater with CAT5.
240 really?
CAT5 used that way, cannot meet code anywhere except maybe in China!
Then again, know what bicyclists call that line on your seat post that denotes the maximum extension of the tube? The lawyer line.
Good news is that he only plugs it in at gigs. And his families lifestyle is just a half notch above Amish. :-)
Oh, and the band includes his family and me...
Yep, 240V.
I’m using it now to tell you. :)
The amount of money save over using #14 AWG is what $20?
Is that the value he places on himself, you, his family and all the people in the audience.
It is a dumb risk for too little reward. Why do it?
If you are his friend, go down to Home Depot or some other store and buy the wire that is suitable for this purpose.
Quit using that piece of crap installation. If you cannot wire it yourself, hire someone that isn’t willing to cause a fire.
I’m with you on the insulation. In my early 20’s I put some Cibia pencil beam lights on my Opel GT and wired it with speaker wire. After a few miles the lights went out and when I opened the hood, I saw the insulation was melted and the wires were grounding out. I’m very “sensitive” about insulation and heat. But the guy IS an electrician and DID use math to support his wiring. I’m not particularly concerned because I don’t think these lights will ever see any serious use - if any at all. :-)
If this is true, then water could have been dripping down the charging line to the 220 Volt line to the wall socket -- past the AC to DC converter.
This link has pictures of the woman...
Insulation aside ... CAT5 has 8 conductors. Paralleling 4 and 4 will increase the effective gauge by 8 (4 steps)
#28 will be #20. Still dangerous with 110 or 220.
The UL test for a fuse used to be to put it in a fuse box packed it with cotton wool, with all circuits loaded to rated capacity, then fault the supply to 2500 Volts, simulating a tranmission line falling onto the distribution line entering the house. If the cotton wool caught fire, the fuse failed. Lightning strikes are another possible hazard.
Whatever the wall socket nominal voltage, a lot of bad things can happen on the other side of socket. Levels of protection and likelihood of a fault vary around the globe. In the absence of other information, I would put China in the low level of protect, high level of incidence brackets.
And 220 V is just a whole lot more dangerous than 120. If the transformer failed, faulting the primary to the secondary (it happens) and the person holding the phone was exposed to 220 V (and was reasonably well grounded) the chance of death is pretty high. I have no idea how well the case of the iPhone is insulated from the charging circuit.
“I don’t think these lights will ever see any serious use - if any at all. :-)”
Even if the fire has another source, the wiring will get the blame and insurance denial.
It is your call to knowingly participate and consider it okay.
I’m pretty sure that the UK is 220 V, as is most of Europe.
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