Hi,
Just ask some Navy old salts who did some magnetic
minesweeping.........Maybe amazing their experience in that matter.
Jos on4kj ( used to be a sparky on those
corks in the fifties).
----- Original Message -----
From: "Jeffrey Madore" <K1LE@arrl.net>
To: "2" <2@vc.net>; <MorgusMagnificen@aol.com>; " AMPS"
<amps@contesting.com>
Sent: Friday, February 07, 2003 4:24 AM
Subject: Re: [Amps] Re: Voodoo "EMF' forces from grid current pulses
>
> >
> > >I strongly challenge this assertion. I know of no mechanism within the
> realm
> > >of classical EM field theory to account for this. I am assuming you are
> > >referring to the normal force that would accompany two current-carrying
> > >conductors which are in parallel proximity to each other.
> > >
> > Have you ever been to a welding shop and observed what happens to
> > arc-welder cables when an arc is struck? I have and I saw the cables
> > jump about on the floor.
>
> Yea verily, Rich!
>
> In my past life I did high current trip testing on 480 volt circuit
> breakers. 50,000 amps was not unusual but even much lower currents would
> make welding cables jump off of the floor.
>
> I remember experimenting with a fairly large 480/120 3 phase lighting
> transformer, with a dead short on the secondary and 208 volts applied to
the
> primary via a pretty large motor control contactor and momentary push
> button. It was a "hit the button while peaking around the corner" type of
> experiment. We were able to draw about 2000 amps momentarily on the
> secondary which really made a set of welding cables jump.
>
> In my experience, a single conductor doesn't need any other conductor near
> it to display mechanical force when high current is applied. The self
> inductance of the cable and resulting cemf produce sufficient magnetic
> reaction to make the cable jump if it is not secured. Very interesting to
> look at the Z of a 4/0 welding cable...
>
> I've often found that if our engineering theories couldn't explain what
> appeared to take place in reality, then we needed to look deeper into the
> matter.
>
> 73, Jeff - K1LE - CT
>
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