Re: Black ABS

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>

Terry,

What would be the best test with an NST?  Since the
pipe is 1/8 inch thick, would putting 15KV on either
side of the pipe and seeing if it conducts be a good
test?  What would I expect with conductive pipe, would
it punch right through?

BTW: The hunk I have makes the hair on my arm stand up
with static, so that's another indication...

Thanks,

Curt.


--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: Vardan
> <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
>
> There seem to be two kinds of black plastics.
>
> One is a greasy carbon filled material that is used
> to resist UV and
> other nasty things.  It usually makes a black mark
> on paper like a
> grease pencil.  Often it is used as in internal
> coating in some types
> of white pipe seen at the hardware store.  This type
> conducts and
> shorts under high voltage.
>
> The other type is a dye.  It seems to be a very deep
> purple that
> looks black.  Often hard and shiny.  This type seems
> to resists high
> voltage like any plastic.
>
> In general, it is best to try and test it with a NST
> or something to
> make sure it will not conduct since both types have
> variations that
> make it hard to tell for sure just by looking at
> them.
>
> Of course, green, white, clear...  plastics have no
> carbon in them in
> any case...
>
> Cheers,
>
>          Terry
>
>
>