lethal dc voltage

EDAboard.com Forum Index -> Other Design -> lethal dc voltage

Author

Message

fogl

Joined: 26 Jan 2005
Posts: 15

05 Sep 2006 12:43 lethal voltage

What is the maximum DC voltage, that is not lethal?

IanP

Joined: 05 Oct 2004
Posts: 6492
Helped: 1542
Location: West Coast

05 Sep 2006 13:05 dangerous dc voltage

Quote:

More specifically, peak voltage greater than 42.4V is hazardous; voltage less than or equal to 42.4V, or SELV (safety extra-low voltage), is non-hazardous. It is difficult to know when electricity can cause serious injury or be fatal. Contact for only 1 to 3sec with currents of only 6 to 200mA can cause electrocution by disrupting the normal rhythm of heart muscles, resulting in fibrillation and leading to death

Quoted from:
http://www.ednasia.com/article-7565-hazardousvoltageprimer-Asia.html
All varies from person to person .. it is very individual ..

Regards,
IanP

rfsystem

Joined: 25 Feb 2002
Posts: 858
Helped: 96

16 Sep 2006 15:56 dc voltage dangerous

<=60V used for wired phone supply give irritation to most
<=110V US, shock but mostly not lethal
220-240V Europe, on the avarage lethal for about a minute

During the first world war there was a decision to use 220V instead of 110V because then wiring could be a quarter thick. That helps to supply more copper to the battlefield during the first world war.

Ironical because of this 220V decision more people died by violance on the battlefiled than by electric shock!

Google
AdSense
Google Adsense

16 Sep 2006 15:56 Ads

newelltech

Joined: 23 Aug 2006
Posts: 217
Helped: 32

16 Sep 2006 16:54 lethal voltages

Very interesting side note - thanks!

flatulent

Joined: 19 Jul 2002
Posts: 4877
Helped: 324
Location: Middle Earth

16 Sep 2006 17:24 minimum lethal voltage

There is another lethal side effect. The muscle contraction will sometimes cause the person to move, sometimes moving into mechanically dangerous areas and dying from mechanical damage to their bodies.

807fm

Joined: 14 Oct 2005
Posts: 13

06 Oct 2006 13:05 what dc voltage is dangerous

Higher DC voltages(over 200V) make blood electrolysys...then very small bubles of gas come into brain...this efect is lethal...human body can be very well and then after 1 or 2 min. Sad

....otherwords you can smile and think is OK and after
few min........... Crying or Very sad

I work with high DC voltages(600-900) 15 years and I think is more,more dangerous than AC.

donkey41

Joined: 19 Feb 2002
Posts: 91
Helped: 2

15 Jul 2009 19:40 lethal dc voltage

for 220 AC, there are chances that one can get away from the wire (which he has touched accidently) because AC's alternating nature - the 50 Hz vibration effect is perhaps the main helpful point of rescue.

what about 240 DC ? is will there be any chance to get away ? or sudden death ?
I ask because I am working nowadays with that kind of high DC voltage.

pranam77

Joined: 22 Apr 2008
Posts: 1071
Helped: 94
Location: Mangalore(India)

16 Jul 2009 10:02 fatal dc voltage

Practically seen, DC is more lethal than AC. It all depends from individual to individual which determines the voltage levels they feel as "lethal". I have one of my close friend Named Rajmohan Nair (Popularely known as "Current Mohan")who is not at all affected by any domestic or industrial electricity. He takes two phases in his two hands and one in the mouth and touches the Neutral with his feet and is still giving shows world wide and is alive.
A part of his performance may be seen on the link given below.

http://www.youtube.com/watch?v=PRf9MqqkMDM
http://my-xperience.blogspot.com/2007/04/current-mohan-electricity-in-human-body.html

FvM

Joined: 22 Jan 2008
Posts: 5161
Helped: 767
Location: Bochum, Germany

16 Jul 2009 10:30 lethal dc current

Quote:

what about 240 DC ? is will there be any chance to get away ? or sudden death ?
I ask because I am working nowadays with that kind of high DC voltage.

You're asking the wrong question. You should better ask about the required and optional safety means when working with dangerous voltage levels. Any likelihood of getting away in case of accident must not come true in your individual case.

donkey41

Joined: 19 Feb 2002
Posts: 91
Helped: 2

16 Jul 2009 19:07 what is the lethal amount of voltage

FvM wrote:

ok, here is, perhaps, the right question Smile

what should the the safety means in case of working with that kind of high voltages ?
I have been in germany so i know that in germany there are strict safety regulations. can you suggest me any safety-how-to ?

For FvM :
Schlecht Deutsch - Verzeihung.
Ich hab' im Dortmund etwa 3 Jahren gelebt und war sehr öfter Buchum meinen Kollegen besuchen kommen. Ich hab's gerade gemerkt, unter Dein ID, dass Du aus Bochum bist Smile