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RE: Pole pig HV wires (fwd)
---------- Forwarded message ----------
Date: Tue, 5 May 1998 11:54:31 -0700
From: "Basura, Brian" <brian.basura-at-unistudios-dot-com>
To: 'Tesla List' <tesla-at-pupman-dot-com>
Subject: RE: Pole pig HV wires (fwd)
Hi,
When using coax (RG-8 or RG-213) should the shield be grounded at the
transformer end or both ends? I would assume just the transformer end or
you'll have a ground loop.
Thanks,
Brian D. Basura
> ----------
> From: Tesla List[SMTP:tesla-at-pupman-dot-com]
> Sent: Tuesday, May 05, 1998 9:43 AM
> To: tesla-at-pupman-dot-com
> Subject: Re: Pole pig HV wires (fwd)
>
>
>
> ---------- Forwarded message ----------
> Date: Tue, 5 May 1998 08:30:57 -0700
> From: Jim Lux <jimlux-at-earthlink-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: Pole pig HV wires (fwd)
>
>
>
> ----------
> > From: Tesla List <tesla-at-pupman-dot-com>
> > To: tesla-at-pupman-dot-com
> > Subject: Pole pig HV wires (fwd)
> > Date: Monday, May 04, 1998 9:05 PM
> >
> >
> >
> > ---------- Forwarded message ----------
> > Date: Mon, 4 May 1998 22:03:20 -0600 (MDT)
> > From: Chip Atkinson <chip-at-pupman-dot-com>
> > To: tesla-at-pupman-dot-com
> > Subject: Pole pig HV wires
> >
> > Greetings,
> >
> > I am looking to get some new wires to connect from the HV of my pole pig
> > to the tank circuit of my coil. I'd like to have something with enough
> > insulation that I could let the wire lay on the concrete, touch each
> > other, etc., and be heavy enough gauge to carry the current, say up to
> 1A
> > for sake of upgradability. Will neon sign wire be enough? I believe
> that
> > it's just the current (amps) that determines the necessary wire gauge,
> > correct?
> Yep.. Although the thickness of the insulation has an effect, in that
> thicker insulation lets the wire get hotter, so the ampacity should
> probably be derated. You could calculate the heating from the series
> resistance, the thermal resistance of polyethylene (what they use in neon
> sign wire), and make sure that the wire doesn't get hot enough to soften
> the PE.
>
> You could also just try it and see if it works.
>
> My GTO-15 neon sign wire is #14, .00254 ohms/ft, or at 1 amp, a whole 2.5
> mW being dissipated in a foot. I doubt that it gets very warm.
>
>
> You could also use RG-213 (or RG-8) which has the advantage of having a
> grounded outer shield which might help with radiated EMI from the TC
> getting back to the transformer, etc.
>