Human body providing a through circuit for elctrical current flow.
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Posted by terryS on April 2, 2008, 4:47 am
Please log in for more thread options "Went over a book which discussed safety in electric systems. To my understanding, I think if there is no complete path to form through your body you won't get a shock taken also with the fact the potential of your body is the same as the point of touch (known as commons). Am I correct? Thanks Jack". This reminds of the story about a little old lady who asked an engineer, back in the days of street cars (trams etc.); "Would I get an electric shock if I stepped on the metal rails in the roadway? The engineer's answer was; "Only if you put your 'other' foot on the overhead street car wires, Ma'am"! Also by way of comment; if the lady was hanging from the overhead wires and was not touching anything on the ground, or in contact with it, she would also not provide any path for electricity and would not be shocked! From a practical point of view if you ARE touching (working on) something electrically hot, keep one hand in your pocket and stand on a rubber mat; you may survive! BTW anything over approx. 30 to 40 volts (depending on RMS peak volts etc.) can be 'felt' by many people and anything over about 50 (taking peak volts into account can shock) and possibly burn. | |||||||||||||
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Posted by z on April 2, 2008, 1:13 pm
Please log in for more thread options also, although you can stick a regular 9 volt battery on your tongue to see if it's good, if you stick one of those little 12 volt batteries with a terminal on each end inside your mouth to see if it's good and it is, your jaws will clamp shut over it, making it hard to remove (don't ask). | |||||||||||||
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Posted by Bob Masta on April 3, 2008, 9:37 am
Please log in for more thread options wrote:
>> =A0Jack had previuosly posted:
>> >> "Went over a book which discussed safety in electric systems. >> To my understanding, I think if there is no complete path to form >> through your >> body you won't get a shock taken also with the fact the potential of >> your >> body is the same as the point of touch (known as commons). Am I >> correct? >> Thanks Jack". >> >> This reminds of the story about a little old lady who asked an >> engineer, back in the days of street cars (trams etc.); "Would I get >> an electric shock if I stepped on the metal rails in the roadway? >> >> The engineer's answer was; "Only if you put your 'other' foot on the >> overhead street car wires, Ma'am"! >> >> Also by way of comment; if the lady was hanging from the overhead >> wires and was not touching anything on the ground, or in contact with >> it, she would also not provide any path for electricity and would not >> be shocked! >> >> From a practical point of view if you ARE touching (working on) >> something electrically hot, keep one hand in your pocket and stand on >> a rubber mat; you may survive! >> >> BTW anything over approx. 30 to 40 volts (depending on RMS peak volts >> etc.) can be 'felt' by many people and anything over about 50 (taking >> peak volts into account can shock) and possibly burn. >
>also, although you can stick a regular 9 volt battery on your tongue >to see if it's good, if you stick one of those little 12 volt >batteries with a terminal on each end inside your mouth to see if it's >good and it is, your jaws will clamp shut over it, making it hard to >remove (don't ask). As a kid I would often strip wires with my teeth. Once I tried it with the leads from a 9V battery clip, battery still in place. Both leads ended up inside my mouth at once. It was an amazing and scary experience... I actually saw the proverbial stars and heard a strange sound "inside my head". Never repeated that "experiment" afterward, but I *did* get a decent pair of wire strippers.... <g>
Best regards, Bob Masta DAQARTA v3.50 Data AcQuisition And Real-Time Analysis www.daqarta.com Scope, Spectrum, Spectrogram, FREE Signal Generator Science with your sound card! | |||||||||||||
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Posted by John Popelish on April 3, 2008, 1:59 am
Please log in for more thread options terryS wrote:
> Jack had previuosly posted:
> > "Went over a book which discussed safety in electric systems. > To my understanding, I think if there is no complete path to form > through your > body you won't get a shock taken also with the fact the potential of > your > body is the same as the point of touch (known as commons). Am I > correct? Take a look at this video of someone touching 400,000 volts AC: http://www.youtube.com/watch?v=UleGgWpeRhI -- Regards, John Popelish | |||||||||||||
>
> "Went over a book which discussed safety in electric systems.
> To my understanding, I think if there is no complete path to form
> through your
> body you won't get a shock taken also with the fact the potential of
> your
> body is the same as the point of touch (known as commons). Am I
> correct?
> Thanks Jack".
>
> This reminds of the story about a little old lady who asked an
> engineer, back in the days of street cars (trams etc.); "Would I get
> an electric shock if I stepped on the metal rails in the roadway?
>
> The engineer's answer was; "Only if you put your 'other' foot on the
> overhead street car wires, Ma'am"!
>
> Also by way of comment; if the lady was hanging from the overhead
> wires and was not touching anything on the ground, or in contact with
> it, she would also not provide any path for electricity and would not
> be shocked!
>
> From a practical point of view if you ARE touching (working on)
> something electrically hot, keep one hand in your pocket and stand on
> a rubber mat; you may survive!
>
> BTW anything over approx. 30 to 40 volts (depending on RMS peak volts
> etc.) can be 'felt' by many people and anything over about 50 (taking
> peak volts into account can shock) and possibly burn.