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dai
welsh and proud
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why is site electric 110 then??
ajlelectronics
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It's the Volts that jolts
but
The mills that kills.
Risk depends on the current flow. Between the arms or down the length of the body is most dangerous. 30mA is enough to stop the heart I believe.
but
The mills that kills.
Risk depends on the current flow. Between the arms or down the length of the body is most dangerous. 30mA is enough to stop the heart I believe.
ajlelectronics
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brightspark
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30 ma is the max the body can take without causing electrocution unles u have a weak ticker
ive knocked a few out when ive been half asleep 
a sharp reminder you need both to do any harm.
why do you think you can bridge a car battery with your hands, which can provide hundreds of amps.
you need enough volts to push the electricity through your body, which is only really a poor conductor.
however, if there aint enough electricity (amps) then it won't do much, hence why the thousands of volts in a static shock will just make you jump.
30mA through your heart will interuppt the signals and can stop it.
30mA in one finger and out the other will just tingle.
Still, be very careful with it though...
I made a habit of switching my arc welder off every time the rod fell out cos i got bitten once or twice.
why do you think you can bridge a car battery with your hands, which can provide hundreds of amps.
you need enough volts to push the electricity through your body, which is only really a poor conductor.
however, if there aint enough electricity (amps) then it won't do much, hence why the thousands of volts in a static shock will just make you jump.
30mA through your heart will interuppt the signals and can stop it.
30mA in one finger and out the other will just tingle.
Still, be very careful with it though...
I made a habit of switching my arc welder off every time the rod fell out cos i got bitten once or twice.
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Putting your finger between 2 phases in a live contactor
drills a neat 3mm hole through it, as accidently demonstrated by a work colleague in the 70's, threw him a few feet as well!
brightspark
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this post is deveating from the original question 
the only thing i will say to anyone dont go under the elusion that if u have a 30 ma trip and touch the live cable u get a tingle and it trips sadly it realy lifts u and bloody hurts then it trips . and if u catch the live and neutral and not the earth it doesnt trip efectively u are the load
the only thing i will say to anyone dont go under the elusion that if u have a 30 ma trip and touch the live cable u get a tingle and it trips sadly it realy lifts u and bloody hurts then it trips . and if u catch the live and neutral and not the earth it doesnt trip efectively u are the load
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rtbcomp
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this post is deveating from the original question
A boss of mine was going to test a newly installed RCD by putting his fingers accross live & neutral. Against my better judgement I stopped him.
mike os
just a little insane.....
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erm yes... it can still hurt and kill.... its just a risk management item, not a risk eliminator.
Friend of mine spent 2 days on a heart monitor after trying to remove both the end caps from a broken flourescent light... while it was on
Friend of mine spent 2 days on a heart monitor after trying to remove both the end caps from a broken flourescent light... while it was on
again ouch...
yeah an RCD will only trip after the current has gone over its trip, and also they are mechanical, and take time to work, whereas electricity, for all intents, doesn't.
my dad shocked himself when he was younger by completing a circuit between the front side part of an old CRT tube and the casing. He said hes not sure which hurt more, the shock or his head as he leap back into the shelf behind him!
yeah an RCD will only trip after the current has gone over its trip, and also they are mechanical, and take time to work, whereas electricity, for all intents, doesn't.
my dad shocked himself when he was younger by completing a circuit between the front side part of an old CRT tube and the casing. He said hes not sure which hurt more, the shock or his head as he leap back into the shelf behind him!
Lewis Medlock
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ive knocked a few out when ive been half asleep
Me too, morning glory and all that.....
I got a belt at work the other day (MMA), grabbed the cable below the electrode holder which had some insulation missing.
No gloves, a bit hot and sweaty, other hand on the work, using 5mm iron powder electrodes so the plant was running at about 330 amps. It woke me up but didn't hurt.
It wasn't as bad as the time I ****** on an electric fence
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But 110v from a transformer is only 55v really, 55v each.
My understanding, is you need a combination of the two to cause damage.
For instance a blade, you might have a 12" blade, but if you havn't got enough strength to push it in, it wont damage anything. Say a 55v/16a
Yet a 220v/16a, will hurt.
Volts is the strength of how far the amps are pushed.
My understanding, is you need a combination of the two to cause damage.
For instance a blade, you might have a 12" blade, but if you havn't got enough strength to push it in, it wont damage anything. Say a 55v/16a
Yet a 220v/16a, will hurt.
Volts is the strength of how far the amps are pushed.
Lewis Medlock
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That makes sense (as a complete ignoramus when it comes to electrickery).
It would also explain why the maximum open circuit voltage allowed on welders was reduced from 100 volts to 80 volts.
We did a thing about it in college last year, before striking the arc - volts were high/amps were low, after striking the arc - volts low/amps high.
I'm sure I didn't have a 330 amp belt, the arc wasn't struck.
I'm still wary of electric fences though.
It would also explain why the maximum open circuit voltage allowed on welders was reduced from 100 volts to 80 volts.
We did a thing about it in college last year, before striking the arc - volts were high/amps were low, after striking the arc - volts low/amps high.
I'm sure I didn't have a 330 amp belt, the arc wasn't struck.
I'm still wary of electric fences though.
Country Joe
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I've not had a shock from any welding kit yet. Hope I never do!
Remember someone saying they'd had a lot of shocks during ac tigging, though.
Might even have been someone on here?
I did that once, as a kid, on a camping holiday somewhere. Had bare feet at the time, dunno if that made it worse or not.
Anyway, coming back from my "reasonable distance away", I walked in a "not yet properly cold" cow-pat.
I'm quite sure bare feet didn't help at this point.
Had chicken-pox at the time too!
But if it's not as bad as peeing on an electric fence, maybe I shouldn't worry too much!
Ever Lucky,
CJ
Remember someone saying they'd had a lot of shocks during ac tigging, though.
Might even have been someone on here?
I did that once, as a kid, on a camping holiday somewhere. Had bare feet at the time, dunno if that made it worse or not.
Anyway, coming back from my "reasonable distance away", I walked in a "not yet properly cold" cow-pat.
I'm quite sure bare feet didn't help at this point.
Had chicken-pox at the time too!
But if it's not as bad as peeing on an electric fence, maybe I shouldn't worry too much!
Ever Lucky,
CJ
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You may well get a shock, for instance your holding something on the floor, but whilst sat on the edge of a steel bench to which your earth is attached to.
I had a beauty one day, quite a tingle, backside perched on the edge of a bench, held two bits ready for matey to tack... made me jump
I had a beauty one day, quite a tingle, backside perched on the edge of a bench, held two bits ready for matey to tack... made me jump
madkayaker
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any shock can kill but its the amps that stop your heart high voltage cooks you. 110V is centre taped to earth so from each live (N is a live conductor) the potential to earth (the big soggy thing you are stud on/ in) is 55V (or 63 if you have a 3/ph 110V supply) the two lives are not both at full potential at the same time. its worth remebering that earth is not that good a conductor so limits the current folw (same as bad connection dimming car light bulb) but a 55V shock if you were well grounded (e.g. layed on earthed steel work welding) could give a fatal shock so for extra protection an even lower voltage is used in confined spaces (24V) and extra RCD. a welder is unlikely to produce a fatal shock but the HSE have issues a guidance note for the risk if you are suffering sleep problems
volts and less than 1 amp if its earthed then you get a higher amp reading and a lower volt reading 
madkayaker
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The volts go down as the capacitor is trying to charge up the earth
