Subject: Re: Reducing contact resistance for low volt use?
Summary: What do you think of these ping times eh?
Reply-To: You can't see me, and I pass right through planets...
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Date: Mon, 06 Jan 2003 12:05:06 GMT
NNTP-Posting-Date: Mon, 06 Jan 2003 07:05:06 EST
On Mon, 06 Jan 2003 06:20:59 GMT, jmuchow@SPAMMENOTcamlight.com (John
Muchow) Gave us:
>Thanks for the teflon wire tip. Do you mean silver-plated copper,
>teflon insulated wire?
It is silver plated copper wire. High strand count yields a higher
silver content. Most assuredly less resistance per foot for a given
> Or some type of specialized teflon core wire?
No. The only place teflon is no good at all is in nuclear reactors.
It breaks down terribly.
It is good in aircraft because it has a slick yet tough hide on it,
and has a high dielectric breakdown strength per mil thickness when
compared to PVC or THHN wire, so is less bulky and lees weight per
given foot of a given gauge.
>I didn't realize that the plating lowered the resistance that much for
Ohms per foot is ohms per foot. Silver is a better conductor than
copper. AC or DC. If you are trying to garner every little bit, how
could it be negligible?
> AC, yes, especially higher frequencies as more and
>more of the current passes only along the outer portion of the wire
>where the silver is.
When there are 20 or more strands in a wire, there is more surface
area plated with silver than you apparently think. As far as skin
effect goes, it would have to have all the strands insulated from each
other, known as a litz configuration. If they are all integral, there
would be no skin effect benefit as it would appear as one conductor of
the max diameter in size.
I would think it is better, as it gets used in their DC systems as
Another reason may well be the oxidation characteristics,
particularly in salt air environments. Copper fairs pretty poorly