Re: HV wire

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Tesla729-at-cs-dot-com>

In a message dated 1/12/02 8:49:43 AM Central Standard Time, tesla-at-pupman-dot-com
writes: 

Jim Lux wrote: 

>
> ).  Vinyl tubing (e.g Tygon) is another 
> possibility, but I don't know how good an insulator vinyl is. 
>
>
>



Jim,all, 

I have personally found the transparent vinyl 1/8" thick walled 
tubing to work quite well to hold off > 15 kVAC when used as 
an outer sheathing around a # 10 AWG standard insulated 
stranded wire. Then I insert the vinyl cover "hot" wire thru an 
equal length of RF grounded aluminum, flex Romex conduit 
(sort of like a big homemade coax cable). I know there has to 
be some corona losses in this setup though, because when 
I energize the "hot"wire inside with my overdriven 14.4 kV pole 
pig with up to about 17 kV out, without any load from being con- 
nected to my coil, I hear a considerable amount of corona 
"hiss" inside the Romex conduit. I know the field is pretty 
even though and I'm not overly concerned about power losses 
from the corona since I'm running a 10 kVA pole pig. In about 
a year, this setup hasn't failed me yet. 

Sparkin' in Memphis, 
David Rieben