Re: coax (grounding shield & AC?)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "James Howells" <james@xxxxxxxxxxxxxxxxxxxxxxx>

This thread has made me rethink about my intentions to use RG ( 
?8)  coax cable for my earth

I have some RG 8 or 58 ?  coaxial - I cannot remember the exact code 
but it is about 1/2 dia and left over from my Radio Ham days ( G6PUR) 
c. 1982 ( the cable is c1995)

As my workshop / computer room Electrical lab ( also known as the 
spare bedroom) is on the first floor I thought about replacing my 
ground -earth wire with this co axial in the hope it might give some 
shielding of any stray RFI

I would have cut back the outer sheath and replaced my ex Navy, bare 
AERIAL wire with the co ax.


I have not had any complaints about RFI and one of my neighbours ( 
100yds away) is an active Radio Ham .... he would soon say !!! he is a mate :)
Would it be beneficial or not
Other, personal considerations : I have brick outer, breeze block ( 
cinder block) inner,  a 12" cavity   wall, it is on the front of the 
house,  The wife will give me allsorts of grief when she sees it ... 
I plan to do it when she is out of course!






Protected by www.SpamJab.com {UgzndUInruKjv2Cy9r}



----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, May 04, 2007 5:49 AM
Subject: coax (grounding shield & AC?)


> Original poster: "M G" <gt4awd@xxxxxxxxx>
>
> "Don't run it with AC with the grounded shield on it."
>
> Hi, just wondering why it is not good to use the coax with grounded 
> shield on for AC? I use coax for high voltage wire on my jacobs 
> ladder. I did notice that if the grounding shield was left normal by 
> the high voltage terminals of the NST it would pick up some of the 
> electricity. A small, weak, arc on the other end of the shield would 
> jump to anything conductive, such as your hand. Cutting the 
> shield/coil of wire off about 1" from the terminals stopped the 
> problem though. Is this the reason, or something else?
> Thanks,
> Matt G.
>
>
> ---------[ Received Mail Content ]----------
>
> Subject : Re: RG-8 coax
>
> Date : Thu, 03 May 2007 01:18:55 -0600
>
> From : "Tesla list" <tesla@xxxxxxxxxx>
>
> To : tesla@xxxxxxxxxx
>
>
>
> Original poster: "resonance"
>
>
>
>
>
> With DC it will handle approx 50 kV just as it is.
>
>
>
> With 60 Hz AC strip the outer coax off and run a separate ground
>
> cable, eg, 12 AWG. Don't run it with AC with the grounded shield on it.
>
>
>
> Dr. Resonance
>
>
>
>
>
>
>
> >I know many of you use RG-8 for HV wire...
>
> >Is it absolutely essential to strip the whole length or can I get away >with
>
> >leaving it as it is.
>
> >
>
> >If I must, what is the most efficient way to do this?
>
> >
>
> >Any response is always appreciated!
>
> >
>
> >Robert Hanford
>
> >
>
> >
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ----------
> Love Games? Gamesville is Waiting for You... Free Online Games, Fat 
> Cash $ Prizes Plus Bingo, Solitaire, Poker & Much More! 
> <http://www.gamesville.com?if_Event=LYCOSMAILgvilletxt>http://www.gamesville.com