On 5/22/06, Russell McMahon <apptech@paradise.net.nz> wrote:
> 1-) Why do sparks exist when we make touch the (+) line to the (-)
> line of
> dc voltage or (phase and neutral line of AC)?
>
> Heated/vapourised material from conductors.
>
> 2-) Where is the source of scent after touching the two lines to each
> other?
>
> Ozone - oxygen in air changed from O2 to O3. Also possibnly material
> from heated conductors or insulation.
>
> 3-) (Although this one is a bit foolish question) Is it wiser to test
> the
> existance of the electricity on the AC line by letting touched phase
> and
> neutral lines?
>
> No!!!
>
> ie Neutral won't tell you anything IF it is properly functioning and
> may turn out to be as lethal as Phase if things are not as they should
> be. use a meter !!!!!!!!!!!!!!!!!!!!!!!!!!!!

He was thinking to a VOLT-meter of course.

This question remebers me of one of my best friends in the highschool.
He graduated finally medicine but also 3 years of electronics. It was the unique
doctor with high voltage electrical diploma in the history of
medicine, having two jobs, one as high voltage electrician and the
second as stomatologist.
On old times before all of those, he was trying to measure the
internal resistance of a mains using an ohmeter.
And he succeed. Once.

greetings,
Vasile


>
>
>        Russell McMahon
>
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