Is it dangerous to change the fan on a PSU?

C'mon people, money where your mouth is time (literally even). I want to see an OcUK version of Mythbusters but probably with more fatalities, that's what the crowd has come to see after all.
 
shaffaaf27 said:
actually, you can walk along a train track, or even the massive Electric pylons (the ones the crosses the countrysides, bringing the leccy), as long as you are not touching anything else. if you JUST walk along one pylon (or hang from it and use your hands to move) there is no potential difference.

With no potential difference, your safe. so if you on a trian track, remain on the ONE track, or jump off.
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Which is why I specified to copper rod into dirty water.

If you hung from a transmission line, the path from left hand, through you, and back through the right hand, would be a parallell loop and take some of the power, a little fraction of 22KV with $DEITY alone know what current, is still bbbbbbbbzzzzzzzzt toast.
 
thegoonden said:
Which is why I specified to copper rod into dirty water.

If you hung from a transmission line, the path from left hand, through you, and back through the right hand, would be a parallell loop and take some of the power, a little fraction of 22KV with $DEITY alone know what current, is still bbbbbbbbzzzzzzzzt toast.
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I don't think so. Current would only pass from one hand through your body and out of the other if there was a potential difference between one hand and the other. If you were simply hanging off a power line this difference would be tiny - the lines are incredibly good conductors (they need to be).
 
thegoonden said:
Which is why I specified to copper rod into dirty water.

If you hung from a transmission line, the path from left hand, through you, and back through the right hand, would be a parallell loop and take some of the power, a little fraction of 22KV with $DEITY alone know what current, is still bbbbbbbbzzzzzzzzt toast.
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Transmission loss on a power line over a distance of about it foot is not going to be sufficient enough to cause any current to flow through you. If they lost 100V+ in 1ft, there'd be sod all voltage at the end of the grid.

The voltage drop is just IR. The current's aren't huge, and resistance is really quite small. This means the voltage drop over a short distance is approximately 3/5 of bugger all.
 
shaffaaf27 said:
VOLTAGE WONT KILL YOU

(sorry i had to shout)

Current on the other hand will.

something as small as 26milliAMPs will kill you.
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Very true. Voltage is simply the potential to kill you. Until the current comes along you're fine.

It's like standing at the base of a dam in a 20ft diameter reservoir overflow pipe. Huge potential to kill you but it ain't going to happen until the current comes along.

Safest advice is, as always, if you don't understand it then don't do it. And yes I've had a full mains shock from a faulty socket box and it's quite an eye opener. Thankfully it blew my hand off the wire instead of clamping it tight.
 
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foxbat said:
Thankfully it blew my hand off the wire instead of clamping it tight.
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My first ever experience with the full 220/240v of the UK mains was years ago, when I got this bomtempi keyboard that had a fan inside it to make the music ( Anyone remember them? ) anyway, I ripped it apart for the fan, and naturaly the mains wire was showing... I knew not to touch it, but I did.

Experience you dont forget in a hurry.

Another time was when I tried ti fit a 1.5v bulb directly into a telefunken socket after the pop and shower of sparks died down, I had to laugh.

More recent times, and vastly closer to a final outcome, was last year, I was on the step ladder and I had the electricity box switched off so I should have been safe, but the electrics in our house are so bad, that even though the light swict hdid not switch the light on, there was still a live wire going to the light (The reason why I was re-wiring some of it - the previous owner was a knob ) and anyway I got a shock and thumb clamped so hard on the wire that I locked up... It was like some guy thumping me really hard really fast and was NOT something that Id recomend.

I was very lucky in that my legs also spazmed and I fell off the ladder, otherwise it would have killed me.

We had a laugh sure, but also undies were changed too!
 
thegoonden said:
Which is why I specified to copper rod into dirty water.

If you hung from a transmission line, the path from left hand, through you, and back through the right hand, would be a parallell loop and take some of the power, a little fraction of 22KV with $DEITY alone know what current, is still bbbbbbbbzzzzzzzzt toast.
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thats why bird can stand on said wire w.o becoming a nice roast
 
thegoonden said:
Well I've never seen anybody try it, put it that way.
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Because it's a daft experiment, and bloody hard to do. You'd have to climb up next to a power line and jump - you couldn't step from something as you'd be grounded and consequently very dead. Then how the hell do you get down again afterwards?!
 
Energize said:
"Since they began their research in 2001, Amnesty International has confirmed 245 Taser-related deaths, she said."
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Selective quoting at its best. You forgot to include the very next paragraph:

"The organization refers to them as "Taser-related," meaning a Taser had been used in the course of a person dying - but was not necessarily the cause of death."
 
This is probably the funniest thread I have read in a long time.
I'm glad (and perhaps a touch surprised) you all are so a healthy and alive!
 
foxbat said:
Selective quoting at its best. You forgot to include the very next paragraph:
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I had noticed that but put it down to the possibility that Energize might be related to my wife..

i.e.

Very selective hearing as well as Very selective quoting.

---

On a lighter note, I wonder how people with Pacemakers will fare with a Tazer?

Not that people woth a pacemaker should be getting themselves into a situation that requires them to be tazered in the first place mind you, but I just wanted to know?
 
foxbat said:
Selective quoting at its best. You forgot to include the very next paragraph:

"The organization refers to them as "Taser-related," meaning a Taser had been used in the course of a person dying - but was not necessarily the cause of death."
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Nope, I entered it into the search bar and hadn't read the rest of the article. However the number have deaths have increased since then anyway, and if you go through the cases individually you will see that many were definatley caused by the tasers, not just related.

http://www.amnestyusa.org/document.php?id=engamr510302006

"However, Amnesty International's research shows that in at least 44 of the 85 cases of taser related deaths since the publication of its previous report, the individuals who died went into cardiac or respiratory arrest at the scene."

http://thereport.amnesty.org/eng/regions/americas/usa

"Sixty-nine people died after being shocked with tasers, bringing to nearly 300 the number of such deaths since 2001. Many of those who died were subjected to multiple shocks or had health problems which could have made them more susceptible to the adverse effects of tasers. Although such deaths are commonly attributed to factors such as drug intoxication, medical examiners have concluded that taser shocks caused or contributed to a number of deaths."
 
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Ive learnt if you respect all the capacitors by not touching the metal contacts and your carefull when dismantling its really easy to swap out fans. Infact I have psu here ready for a new fan as it buzzes like mad.
 
Lets not get distracted here guys... Its not the capacitors you need to worry about

Its the transformer... That stores electricity even when off and your finger is all it needs.

The caps wont do bugger all with bare skin
 
its the caps that store the electricity isnt it ?

even if you touch them by mistake you wont die

it hurts though!
 
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