which one is more dangerous ac source or dc source

[srinivasan]

230 v ac and 230 v dc ,, which one is more dangerous to human body

 

[K8MHZ]

230 v ac and 230 v dc ,, which one is more dangerous to human body

DC. AC contracts and relaxes muscles, DC just contracts them so it's harder to let go. There are other reasons, too, but the answer is DC.

You will also notice that contacts that are rated for both AC and DC will have a lower DC than AC rating.

 

[zog]

DC. AC contracts and relaxes muscles, DC just contracts them so it's harder to let go. There are other reasons, too, but the answer is DC.

You will also notice that contacts that are rated for both AC and DC will have a lower DC than AC rating.

Nope, AC is more dangerous. AC causes ventricular fibrilation which is by far the most common cause of death following a shock, DC does not cause fibrilation it just stops the heart which is much more recoverable than being in fibrilation. In fact DC is used to treat a person in fib.

Also the minimum let go current (Level at which your muscles contract and you can't let go) is 10-20mA for AC. The min let go current for DC is 75mA. So it takes 5 times as much DC current to have the same effect.

IEC 479 and IEEE 80 are the 2 most recogonized standards on the effects of electric shock, and also is my reference.

 

[Jraef]

When you die of electrocution, you are more dead from DC than you are from AC.

Proven fact.... :roll:

Seriously, it's all circumstantial. BOTH are dangerous, BOTH can be deadly. Edison tried in vain to prove that AC was more dangerous, the result was the Electric Chair. But in an earlier experiment that he caught on film, he killed an elephant with AC and it took an agonizingly long time to die. Tesla sat inside of a large Tesla Coil field and read a book to prove how safe AC was. It just went back and forth with no real conclusion.

In a 30+ year career, I have only witnessed one electrocution accident and that was from DC; a technician touched a DC bus on a large steel mill drive and was locked on for too long before we could find a 2x4 to push him off. But more people die from electrocution each year as a result of AC contact, because there is a LOT more AC running around to come in contact with.

 

[Gac66610]

When you die of electrocution, you are more dead from DC than you are from AC.

um i am no expert but i think once you're dead you cant be "more dead"

 

[jumper]

When you die of electrocution, you are more dead from DC than you are from AC.

Proven fact.... :roll:

LMAO.:thumbsup::thumbsup::thumbsup:

 

[zog]

um i am no expert but i think once you're dead you cant be "more dead"

Nah, he is just mostly dead, if he was all dead there is only one thing to do, go though his pockets for loose change.

 

[zog]

. But in an earlier experiment that he caught on film, he killed an elephant with AC and it took an agonizingly long time to die.

Yep, Topsy, poor Topsy

http://www.bing.com/videos/search?q...EFBBCD96ED2E39E14F17EF&view=detail&FORM=VIRE5

 

[dereckbc]

Ask one of these two guys here in Dallas who got caught stealing copper. However it was 13.2

{Moderator's Note: I removed the photo. We don't allow gruesome images (including photos of dead people or animals) to be posted here}

 

[Stevareno]

I got hung up on 120V AC once. I can only imagine that 120V DC would have a similar effect, sans the teeth rattling buzz. hmy:

 

[T.M.Haja Sahib]

Polarity of DC voltage in electrocution

Polarity of DC voltage in electrocution

In case of DC,polarity of voltage also is important to cause electrocution.In one experiment two rabbits were connected in series across a DC voltage via a switch.On closing the switch,only one died and other survived.On reversing the polarity,the other also died.

 

[mivey]

In case of DC,polarity of voltage also is important to cause electrocution.In one experiment two rabbits were connected in series across a DC voltage via a switch.On closing the switch,only one died and other survived.On reversing the polarity,the other also died.

Where's the rim shot?

 

[T.M.Haja Sahib]

The rabbits on DC voltage experiment was mentioned in V.Manoilav's 'Electricity and Man' MIR publishers,Moscow.

 

[Jraef]

The rabbits on DC voltage experiment was mentioned in V.Manoilav's 'Electricity and Man' MIR publishers,Moscow.

Ah, well, as we all know if it comes from Russia, it must be true...

I suppose it never occurred to him that the reason the second rabbit would die is because it was the only one still alive eh?

Or did the first one come back to life? If so, maybe he was plagiarizing an earlier work by V. Frankenstein. :ashamed:

 

[T.M.Haja Sahib]

I suppose it never occurred to him that the reason the second rabbit would die is because it was the only one still alive eh?

The second rabbit did not die,despite DC was passing it,till polarity of DC voltage was reversed.

 

[iwire]

The second rabbit did not die,despite DC was passing it,till polarity of DC voltage was reversed.

He obviously had used the wrong polarity rabbit.

 

[T.M.Haja Sahib]

You are totally clueless.

 

[don_resqcapt19]

In case of DC,polarity of voltage also is important to cause electrocution.In one experiment two rabbits were connected in series across a DC voltage via a switch.On closing the switch,only one died and other survived.On reversing the polarity,the other also died.

To know if it was polarity or something else the experimenter would have to look at thousands of details. It would not be a simple experiment.
Did the original experimenter give any details as to why polarity mattered?

 

[iwire]

I think we need to know if this was a positive ground or negative ground rabbit.

 

[Strathead]

Nah, he is just mostly dead, if he was all dead there is only one thing to do, go though his pockets for loose change.

After you disconnect him from the source! We must be safe now!