Re: Ideas for HV Wiring.

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

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>



Tesla list wrote:
> 
> Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jimlux-at-earthlink-dot-net>
> 
>
> 
> That coax is usually low loss foam dielectric stuff, totally unsuited for
> HV.  For HV use, you want the stuff with a dielectric should be a solid
> translucent waxy substance (i.e. polyethylene or teflon).


Correct in that all the industrial hv cable i've worked with uses an
ultra high molecular weight poly of 1.5" for 2400v and upwards of 3" for
15kv. This stuff you couldn't barely chip with Jed clampets best
whittling
knife. I would spend an hour on one splice until a lineman showed me the
nice little tool that clamped on the cable and with a few twists it cut
all three steps into the cable (like a big coax cutter). Each step for
the shield, the semi conductive layer and the poly dielectric. I will
not say i didn't have a few hv splices blow apart as soon as the power
was applied, A humbling expedience indeed, but in it i don't have any
doubts that a good coax would work on lower current coils. The best coax
might even work on medium current coils, At the first time i saw hv
cable i even said "it looks like BIG coax to me"