Electrocution by iPhone charger (involving a bathtub)

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Discussion Overview

The discussion revolves around the circumstances surrounding the electrocution of a man who was using his iPhone while charging it in the bathtub. Participants explore various aspects of electrical safety, the design of Apple chargers, and the potential causes of the incident, including the role of extension cords and GFCI (Ground Fault Circuit Interrupter) devices.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Exploratory

Main Points Raised

  • Some participants question how the mains reference could have reached the man, suggesting possibilities such as a transformer, optocoupler, or Y-Class capacitor.
  • There is speculation about whether the bathtub is electrically isolated and the implications of bonded taps and drains.
  • Some argue that the cause of the electrocution remains unknown due to a lack of specific information about the setup.
  • Concerns are raised about the absence of a GFCI in the hallway where the extension cord was plugged in, which may have contributed to the incident.
  • Participants discuss the possibility that the charger or extension cord itself fell into the bath, leading to the electrocution.
  • One participant suggests that low voltage can still be dangerous when the skin is wet, sharing a personal experience to illustrate this point.
  • There is a suggestion that the current could pass through the chest without triggering a GFCI, depending on the circumstances.
  • Some express frustration over the perceived lack of responsibility in safety practices, while others emphasize the need for caution when using electrical devices near water.
  • One participant mentions that the severe burns observed were inconsistent with a low voltage shock from the charger alone.

Areas of Agreement / Disagreement

Participants generally do not reach a consensus on the exact cause of the electrocution, with multiple competing views and hypotheses remaining throughout the discussion.

Contextual Notes

There are limitations in the discussion due to missing details about the specific electrical setup and the conditions under which the incident occurred. The role of the extension cord and the safety standards in different regions (US vs. UK) are also points of contention.

Guineafowl
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This link:

http://www.telegraph.co.uk/news/2017/03/17/man-died-charging-iphone-bath/

Briefly, a man was using his iPhone in the bath while he was charging it. He dropped it in and was electrocuted. How?

Where did the mains reference come from - transformer? Optocoupler? Y-Class capacitor? I always thought Apple chargers were well designed safety-wise.

Isn't a bathtub isolated electrically? (Yes, the taps are bonded, I know).
Why didn't his RCD (GFCI) trip?In short... how?
 
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Guineafowl said:
Briefly, a man was using his iPhone in the bath while he was charging it. He dropped it in and was electrocuted. How?

for all us here, not knowing all the facts of the situation ... the answer can only be "cause unknown"

Guineafowl said:
Where did the mains reference come from - transformer? Optocoupler? Y-Class capacitor? I always thought Apple chargers were well designed safety-wise.

as I said, unknown, there must have been a cabling fault of some sort

Guineafowl said:
Isn't a bathtub isolated electrically? (Yes, the taps are bonded, I know).

maybe / maybe ... again without the specific info ... cause unknown
Guineafowl said:
Why didn't his RCD (GFCI) trip?

probably wasn't one installedDave
 
The bathtub drain is also bonded.
 
anorlunda said:
The bathtub drain is also bonded.
Not in the UK, I believe.

In any case, is the 5v from an Apple charger not 'floating'?
 
It's not really clear what fell in the bath.
If it was a cable carrying AC mains to some other device, the result is unsurprising.
 
They talk about an extension cord from the hallway ...
PC Craig Pattison told the inquest at West London Coroner's Court how he found the extension lead running from the hallway outside into the bathroom.

"We found an iPhone plugged into the extension cable and then the charger element in the bath," he explained.

The phrase "charger element in the bath" leads me to believe that the AC cord and charger itself fell into the bath, not just the phone and charger cable end. The hallway probably would not have had a GFCI (at least not in the US - those are more commonly used in the bathroom and kitchens or any wet area, but older homes may not have them).

Also:

Coroner Dr Sean Cummings said: "This was a tragic accident and I have no reason to believe at all that there anything other than it being completely accidental.

If only the phone side was in the bath, he should not have been electrocuted, as mentioned, that side should be isolated from the mains. It would take a fault in the charger, and I think they would have mentioned it, and not only called it an accident.
 
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The low voltage surely "floats" (no pun intended)

US code says there should NOT be a receptacle within reach of the tub, for obvious reasons.

That suggests he had it plugged into an extension cord,
and if that fell into the tub anything could happen.

That said, low voltage will really shock when your your skin is wet. I state from personal experience it is impossible to hand tighten a loose 12 volt boat battery terminal when you're soaked with seawater . It would not surprise me if somebody immersed chest deep in water maybe laced with bath salts were to get electrocuted by fifteen volts.

My bet though is on the extension cord scenario, he got the high side of his power supply in the water.
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EDIT i see NTL got there ahead of me. :)
 
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NTL2009 said:
The hallway probably would not have had a GFCI (at least not in the US

Awhile back, a U.K.-based EE on another forum I participate in told me that the U.K. tends to be more rigorous than the U.S. in its standards for GFCI in old buildings as well as new. Obviously that's a very general observation & doesn't speak to this particular situation.
 
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It's not quite clear, is it?! Oh, I wish for more technically-minded journalists...

If he had the trailing socket on his chest, charger plugged in, then a) that is catastrophically stupid, and b) I don't get the talk of sending Apple a letter about safety, nor the comments about there 'only being a transformer between you and the mains'. He got a shock from the trailing socket. No transformer or Apple product involved.
 
  • #12
willem2 said:
https://www.thesun.co.uk/news/31112...n-a-bath-with-the-mobile-resting-on-his-chestI Think you could get a current through your chest that won't trigger a GFCI.

The coroner probably should sent a warning to the manufacturer of the extension cord.
Tell them to put a warning in the instructions?:

"Don't plug this in and take it in the bath with you?"

There are all sorts of very obvious remarks we could make about stupidity here, but the fact is, there is no need to change the instructions of any device, or any laws, or to berate any manufacturers. All we need is for responsible adults to behave as such.

*Gets on soapbox* Our current risk-averse legislative climate is so tight, and the injury lawyers are so close over our shoulders, that daily life, if possible, has become 'too' safe. Every hole in the ground has a fence, signs and lights; every downed branch has reflective tape on it and a bored man directing you round it. People walk along the street looking at nothing but their phones, expecting not to trip, fall or bang into something in doing so. Our danger perception is blunted. Look at the idiots who went on a winter car journey in T-shirts - no torches, warm clothing, spare wheel, food or basic recovery gear. They nearly died from a puncture. This poor man may have been an adult in other ways, but he had a child's idea of risk.
 
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  • #13
He dropped the extension lead (mains Voltage) into the bath. The fact that he was charging a phone is immaterial.
 
  • #14
From Willem 's Sun link:
He suffered severe burns on this chest, arm and hand when part of it touched the water.

Wife Tanya found him when she returned home and first thought he had been attacked because his injuries were so bad.
5 volts at an amp from low voltage side of the charger won't do that . .
 

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