electric shock

I was working on a 55VAC line-powered TV system the other day and I
could feel the power through dry fingers. I got the impression 55V could
be quite nasty with wet hands and a good earth. It was interesting to
feel this attenuated mains. The individual cycles can be felt quite
clearly. It made me wonder if the feeling of touch has less persistence
than vision. Of course the ears would turn the 50Hz into a note.

Bill

On Fri, 18 May 2012 16:06:31 +0100
Bill Wright wrote:

I was working on a 55VAC line-powered TV system the other day and I
could feel the power through dry fingers. I got the impression 55V
could be quite nasty with wet hands and a good earth. It was
interesting to feel this attenuated mains. The individual cycles can
be felt quite clearly. It made me wonder if the feeling of touch has
less persistence than vision. Of course the ears would turn the 50Hz
into a note.

Bill

The 'nasty' value would also depend on the available current flow,
surely? 20 Amps would do serious damage, even 2 will kill you.
--
Davey.

Now here is a thing. We have some pylons near here, if I walk under the
lines , thn hold my white cane up in the air, I can feel the 50 hertz as i
gently run my finger over any exposed aluminium exposed area on the cane.



Brian

--
From the Sofa of Brian Gaff Reply address is active
"Bill Wright" wrote in message
...
I was working on a 55VAC line-powered TV system the other day and I could
feel the power through dry fingers. I got the impression 55V could be quite
nasty with wet hands and a good earth. It was interesting to feel this
attenuated mains. The individual cycles can be felt quite clearly. It made
me wonder if the feeling of touch has less persistence than vision. Of
course the ears would turn the 50Hz into a note.

Bill

Its of course across the heart you need to watch out for. Some people like
the effect of electric shocks, but obviously there are limits!

Brian

--
From the Sofa of Brian Gaff Reply address is active
"Davey" wrote in message
...
On Fri, 18 May 2012 16:06:31 +0100
Bill Wright wrote:

I was working on a 55VAC line-powered TV system the other day and I
could feel the power through dry fingers. I got the impression 55V
could be quite nasty with wet hands and a good earth. It was
interesting to feel this attenuated mains. The individual cycles can
be felt quite clearly. It made me wonder if the feeling of touch has
less persistence than vision. Of course the ears would turn the 50Hz
into a note.

Bill

The 'nasty' value would also depend on the available current flow,
surely? 20 Amps would do serious damage, even 2 will kill you.
--
Davey.

"Bill Wright" wrote in message
...
I was working on a 55VAC line-powered TV system the other day and I could
feel the power through dry fingers. I got the impression 55V could be quite
nasty with wet hands and a good earth. It was interesting to feel this
attenuated mains. The individual cycles can be felt quite clearly. It made
me wonder if the feeling of touch has less persistence than vision. Of
course the ears would turn the 50Hz into a note.

Bill

In my younger days I managed to get 'stuck' on the 240V mains (picked up a
live electrical item I was working on, forgetting the bottom cover was
removed). I reckon I was connected for about five seconds before the power
was removed.
I can testify you can REALLY feel the cycles! Seriously scary moment when
realised couldn't do anything about it. Arm muscles were near unusable for
days afterwards. Over twenty years on you can still see the marks on my
hands where the skin melted.

Davey wrote:
On Fri, 18 May 2012 16:06:31 +0100
Bill Wright wrote:

I was working on a 55VAC line-powered TV system the other day and I
could feel the power through dry fingers. I got the impression 55V
could be quite nasty with wet hands and a good earth. It was
interesting to feel this attenuated mains. The individual cycles can
be felt quite clearly. It made me wonder if the feeling of touch has
less persistence than vision. Of course the ears would turn the 50Hz
into a note.

Bill

The 'nasty' value would also depend on the available current flow,
surely? 20 Amps would do serious damage, even 2 will kill you.
A lot less than 2A across your chest will kill you.

Bill

In article ,
Bill Wright wrote:
The individual cycles can be felt quite
clearly. It made me wonder if the feeling of touch has less persistence
than vision. Of course the ears would turn the 50Hz into a note.

Presumably you feel it as 100Hz, since all you can detect is the
magnitude.

-- Richard

On 18/05/2012 16:09, Davey wrote:
On Fri, 18 May 2012 16:06:31 +0100
Bill wrote:

I was working on a 55VAC line-powered TV system the other day and I
could feel the power through dry fingers. I got the impression 55V
could be quite nasty with wet hands and a good earth. It was
interesting to feel this attenuated mains. The individual cycles can
be felt quite clearly. It made me wonder if the feeling of touch has
less persistence than vision. Of course the ears would turn the 50Hz
into a note.

Bill

The 'nasty' value would also depend on the available current flow,
surely? 20 Amps would do serious damage, even 2 will kill you.
Actually anything greater than 20mA can induce cardiac fibrillation.
This is why most RCDs are rated at 20mA leakage current.

Rob.

On Fri, 18 May 2012 17:49:13 +0200, Martin wrote:

On Fri, 18 May 2012 16:16:14 +0100, "Brian Gaff"
wrote:

Its of course across the heart you need to watch out for. Some people like
the effect of electric shocks, but obviously there are limits!

Brian

In one of today's newspapers there is a photo of a paraplegic guy who
has just swum between two of the Indonesian islands using special
attachments to what is left of his legs. It says he was electrocuted
whilst removing a TV aerial

You can't be electrocuted and live to tell the tail. By definition the
word means a fatal electric shock.

It was coined at the time of the first electric chair, a contraction
of "electric execution".

--
Graham.
%Profound_observation%

On Fri, 18 May 2012 18:09:40 +0100, Graham. wrote:

On Fri, 18 May 2012 17:49:13 +0200, Martin wrote:

On Fri, 18 May 2012 16:16:14 +0100, "Brian Gaff"
wrote:

Its of course across the heart you need to watch out for. Some people like
the effect of electric shocks, but obviously there are limits!

Brian

In one of today's newspapers there is a photo of a paraplegic guy who
has just swum between two of the Indonesian islands using special
attachments to what is left of his legs. It says he was electrocuted
whilst removing a TV aerial

You can't be electrocuted and live to tell the tail. By definition the
word means a fatal electric shock.

It was coined at the time of the first electric chair, a contraction
of "electric execution".


Tale, not tail. Sory.

--
Graham.
%Profound_observation%